iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
ASTM

ASTM B912-02(2018)

(Specification)

Standard Specification for Passivation of Stainless Steels Using Electropolishing

Standard Specification for Passivation of Stainless Steels Using Electropolishing

ABSTRACT
This specification covers the passivation by electropolishing of stainless steel alloys in the 200, 300, and 400 series, as well as precipitation-hardened alloys. Basis materials shall be free of clearly visible defects, and if necessary, shall undergo preparatory cleaning procedures prior to electropolishing. Post-coating procedures such as post dip and final rinsing shall be performed as well. The performance of the specimens during passivation shall be evaluated by one or more of the following procedures: water immersion test; humidity test; salt spray test; copper sulfate test; and modified ferroxyl test for free iron.
SCOPE
1.1 This specification covers the passivation of stainless steel alloys in the 200 (UNS2XXXX), 300 (UNS3XXXX), and 400 (UNS4XXXX) series, and the precipitation-hardened alloys, using electropolishing procedures.
Note 1: Surface passivation occurs simultaneously with electropolishing under proper operating conditions. The quality of passivation will depend on the type of stainless steel, the formulation of the electropolishing solution, and the conditions of operation. Free iron on the surface of the stainless steel is removed resulting in improved corrosion resistance. Surface smoothing obtained by electropolishing will also improve corrosion resistance. Electropolishing will also remove heat tint and oxide scale.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This specification may involve hazardous materials, operations, and equipment. This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Sep-2018
ICS
49.040 - Coatings and related processes used in aerospace industry
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.07 - Conversion Coatings
Current Stage
Ref Project

Relations

Refers
ASTM A967/A967M-17 - Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
Effective Date
01-Jul-2017
Refers
ASTM D3951-15 - Standard Practice for Commercial Packaging
Effective Date
01-Dec-2015
Refers
ASTM D3951-18 - Standard Practice for Commercial Packaging
Effective Date
01-May-2018
Referred By
ASTM F1089-18 - Standard Test Method for Corrosion of Surgical Instruments
Effective Date
01-Oct-2018
Referred By
ASTM F86-21 - Standard Practice for Surface Preparation and Marking of Metallic Surgical Implants
Effective Date
01-Oct-2018

Buy Standard

ASTM B912-02(2018) - Standard Specification for Passivation of Stainless Steels Using ElectropolishingASTM B912-02(2018) - Standard Specification for Passivation of Stainless Steels Using Electropolishing
PreviousNext
Technical specification
ASTM B912-02(2018) - Standard Specification for Passivation of Stainless Steels Using Electropolishing
English language
4 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B912 −02 (Reapproved 2018)
Standard Specification for
1
Passivation of Stainless Steels Using Electropolishing
This standard is issued under the fixed designation B912; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope A967/A967M Specification for Chemical Passivation Treat-
ments for Stainless Steel Parts
1.1 This specification covers the passivation of stainless
B117 Practice for Operating Salt Spray (Fog) Apparatus
steel alloys in the 200 (UNS2XXXX), 300 (UNS3XXXX), and
B322 Guide for Cleaning Metals Prior to Electroplating
400 (UNS4XXXX) series, and the precipitation-hardened
B374 Terminology Relating to Electroplating
alloys, using electropolishing procedures.
B602 Test Method for Attribute Sampling of Metallic and
NOTE 1—Surface passivation occurs simultaneously with electropolish-
Inorganic Coatings
ing under proper operating conditions. The quality of passivation will
D3951 Practice for Commercial Packaging
depend on the type of stainless steel, the formulation of the electropol-
3
2.2 ISO Standards:
ishing solution, and the conditions of operation. Free iron on the surface
of the stainless steel is removed resulting in improved corrosion resis- ISO 2080 Electroplating and Related Processes—
tance. Surface smoothing obtained by electropolishing will also improve
Vocabulary
corrosion resistance. Electropolishing will also remove heat tint and oxide
ISO 4519 Electrodeposited Metallic Coatings and Related
scale.
Finishes—Sampling Procedures for Inspection by Attri-
1.2 The values stated in SI units are to be regarded as
butes
standard. No other units of measurement are included in this
ISO 9227 Corrosion Tests in Artificial Atmospheres—Salt
standard.
Spray Tests
1.3 This specification may involve hazardous materials, ISO 15730 Metallic and Other Inorganic Coatings—
operations, and equipment. This specification does not purport Electropolishing as a Means of Smoothing and Passivat-
ing Stainless Steels
to address all of the safety concerns, if any, associated with its
use. It is the responsibility of the user of this standard to
3. Terminology
establish appropriate safety, health, and environmental prac-
tices and determine the applicability of regulatory limitations
3.1 Definitions:
prior to use.
3.1.1 electropolishing, n—electrochemical process in which
1.4 This international standard was developed in accor-
the article(s) to be passivated are treated anodically in a
dance with internationally recognized principles on standard-
suitable acid medium.
ization established in the Decision on Principles for the
3.1.2 passivation, n—rendering of a stainless steel surface
Development of International Standards, Guides and Recom-
into a lower state of chemical reactivity.
mendations issued by the World Trade Organization Technical
3.1.2.1 Discussion—Passivated surfaces are characterized
Barriers to Trade (TBT) Committee.
by the absence of free iron, as defined by Practice A380/
A380M.
2. Referenced Documents
3.2 Definitions of Terms Specific to This Standard:
2
2.1 ASTM Standards:
3.2.1 Definitions of terms in this specification can be found
A380/A380M Practice for Cleaning, Descaling, and Passi-
in Terminology B374 and ISO 2080.
vation of Stainless Steel Parts, Equipment, and Systems
4. Ordering Information
4.1 When ordering articles to be electropolished in confor-
1
This specification is under the jurisdiction of ASTM Committee B08 on
mance with this standard, the purchaser shall state the follow-
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
B08.07 on Conversion Coatings.
ing:
Current edition approved Oct. 1, 2018. Published October 2018. Originally
4.1.1 Alloy Designation—When ordering articles passivated
approved in 2002. Last previous edition approved in 2013 as B912 – 02 (2013).
in accordance with this specification, the purchaser shall state,
DOI: 10.1520/B0912-02R18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 -----------
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

ASTM
ASTM B1023-22(Test Method)
Standard Test Method for Abrasion Resistance of Hard Anodic Coatings by a Taber-Type Abraser

SIGNIFICANCE AND USE
5.1 Hard anodic oxidation coatings are often used to obtain improved resistance to abrasion, and have been used in such applications as valves, sliding parts, hinge mechanisms, cams, gears, swivel joints, pistons, insulation plates, blast shields, etc.  
5.2 This abrasion resistance test method may be useful for acceptance testing of a hard anodic coating, and it can be used to evaluate the effects of processing variables such as substrate preparation before coating, surface texture, coating technique variables, and post coating treatments.  
5.3 Results may be used for process control, comparative ranking, or to correlate with end-use performance. The resistance of material surfaces to abrasion, as measured on a testing machine in the laboratory, is generally only one of several factors contributing to wear performance as experienced in the actual use of the material. Other factors may need to be considered in any calculation of predicted life from specific abrasion data.  
5.4 The properties and characteristics of hard anodic oxidation coatings are significantly affected by both the alloy and the method of production.
Note 2: Hard anodizing will usually result in a dimensional increase on each surface equal to about 50 % of the coating thickness. Normal thickness for wear applications tends to be 40 µm to 60 µm; however the thickness of anodized coatings often ranges between 8 µm to 150 µm.  
5.5 The resistance of hard anodic coatings to abrasion may be affected by factors including test conditions, type of abradant, pressure between the specimen and abradant, composition of the alloy, thickness of the coating, and the conditions of anodizing or sealing, or both.
Note 3: The resistance to abrasion is generally measured on unsealed anodic oxidation coatings. While corrosion resistance is often increased by sealing the coating, it has been observed that sealing or dyeing can reduce the resistance to abrasion by over 50 %.  
5.6 The outer surface of the anod...
SCOPE
1.1 This test method quantifies the abrasion resistance of electrolytically formed hard anodic oxidation coatings on a plane, rigid surface of aluminum or aluminum alloy.  
1.2 This test uses a Taber-type abraser,2 which generates a combination of rolling and rubbing to cause wear to the coating surface. Wear is quantified as cumulative mass loss or loss in mass per thousand cycles of abrasion.  
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Note 1: The procedure described in Method A is similar to MIL-PRF-8625 (paragraph 4.5.5) and SAE AMS 2469 (paragraph 3.3.4). The procedure described in Method B includes a break-in period of 1000 cycles and is similar to ISO 10074 Annex B. When no procedure is specified, Method A shall be the default procedure. Although the procedures described in this method may be similar, they are not equivalent to Specification B893 or Test Method D4060.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    8 pages
    English language
    sale 15% off
ASTM
ASTM B1023-22(Test Method)
Standard Test Method for Abrasion Resistance of Hard Anodic Coatings by a Taber-Type Abraser

SIGNIFICANCE AND USE
5.1 Hard anodic oxidation coatings are often used to obtain improved resistance to abrasion, and have been used in such applications as valves, sliding parts, hinge mechanisms, cams, gears, swivel joints, pistons, insulation plates, blast shields, etc.  
5.2 This abrasion resistance test method may be useful for acceptance testing of a hard anodic coating, and it can be used to evaluate the effects of processing variables such as substrate preparation before coating, surface texture, coating technique variables, and post coating treatments.  
5.3 Results may be used for process control, comparative ranking, or to correlate with end-use performance. The resistance of material surfaces to abrasion, as measured on a testing machine in the laboratory, is generally only one of several factors contributing to wear performance as experienced in the actual use of the material. Other factors may need to be considered in any calculation of predicted life from specific abrasion data.  
5.4 The properties and characteristics of hard anodic oxidation coatings are significantly affected by both the alloy and the method of production.
Note 2: Hard anodizing will usually result in a dimensional increase on each surface equal to about 50 % of the coating thickness. Normal thickness for wear applications tends to be 40 µm to 60 µm; however the thickness of anodized coatings often ranges between 8 µm to 150 µm.  
5.5 The resistance of hard anodic coatings to abrasion may be affected by factors including test conditions, type of abradant, pressure between the specimen and abradant, composition of the alloy, thickness of the coating, and the conditions of anodizing or sealing, or both.
Note 3: The resistance to abrasion is generally measured on unsealed anodic oxidation coatings. While corrosion resistance is often increased by sealing the coating, it has been observed that sealing or dyeing can reduce the resistance to abrasion by over 50 %.  
5.6 The outer surface of the anod...
SCOPE
1.1 This test method quantifies the abrasion resistance of electrolytically formed hard anodic oxidation coatings on a plane, rigid surface of aluminum or aluminum alloy.  
1.2 This test uses a Taber-type abraser,2 which generates a combination of rolling and rubbing to cause wear to the coating surface. Wear is quantified as cumulative mass loss or loss in mass per thousand cycles of abrasion.  
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Note 1: The procedure described in Method A is similar to MIL-PRF-8625 (paragraph 4.5.5) and SAE AMS 2469 (paragraph 3.3.4). The procedure described in Method B includes a break-in period of 1000 cycles and is similar to ISO 10074 Annex B. When no procedure is specified, Method A shall be the default procedure. Although the procedures described in this method may be similar, they are not equivalent to Specification B893 or Test Method D4060.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    8 pages
    English language
    sale 15% off
ASTM
ASTM E1216-21(Practice)
Standard Practice for Sampling for Particulate Contamination by Tape Lift

SIGNIFICANCE AND USE
3.1 The tape lift provides a rapid and simple technique for removing particles from a surface and determining their number and size distribution.  
3.2 By using statistically determined sample size and locations, an estimate of the surface cleanliness level of large areas can be made. The user shall define the sampling plan.  
3.3 The sampling plan shall consider the importance of surface geometry and surface orientation to gas flow, gravity, obstructions, and previous history of hardware. These factors influence particle fallout and entrapment of particles on the surface. The geometry of joints, recessed areas, fasteners, and the correspondence of particle-count data to area can be maintained.  
3.4 The selection of tape and the verification of its effect on the cleanliness of the hardware is very important. The tape adhesive should have sufficient cohesion to avoid transfer of the adhesive to the surface under test. The impact of adhesive transfer should be evaluated by laboratory testing before using the tape on the hardware. Since potential for adhesive transfer exists, cleaning to remove any adhesive might be required. In addition, the tape should have low outgassing characteristics, and as a minimum, it should meet the requirements of less than 1.0 % total mass loss (TML) and 0.1 % collected volatile condensable materials (CVCM), as measured by Test Method E595.  
3.5 Care should be exercised in deciding which surfaces should be tested by this practice. The tape can remove marginally adhering paint and coatings. Optical surfaces should not be tested until verification has been made that the surface coating will not be damaged. The minimum effectiveness of particle removal from smooth surfaces and angles down to 90° for all practice methods is 90 % for particles larger than 5 μm. Rough surface finishes result in low removal efficiencies. Surface finishes up to approximately 3.20 μm (125 μin.) have been tested and found to give satisfactory results.  
3.6 T...
SCOPE
1.1 This practice covers procedures for sampling surfaces to determine the presence of particulate contamination, 5 μm and larger. The practice consists of the application of a pressure-sensitive tape to the surface followed by the removal of particulate contamination with the removal of the tape. The tape with the adhering particles is then mounted on counting slides. Counting and measuring of particles is done by standard techniques.  
1.2 This practice describes the materials and equipment required to perform sampling of surfaces for particle counting and sizing.  
1.3 The criteria for acceptance or rejection of a part for conformance to surface cleanliness level requirements shall be determined by the user and are not included in this practice.  
1.4 This practice is for use on surfaces that are not damaged by the application of adhesive tape. The use of this practice on any surface of any material not previously tested, or for which the susceptibility to damage is unknown, is not recommended. In general, metals, metal plating, and oxide coatings will not be damaged. Application to painted, vapor deposited, and optical coatings should be evaluated before implementing this test.  
1.5 This practice provides three methods to evaluate tape lift tests, as follows:
Practice  
Sections  
A—This method uses light transmitted through the tape and tape adhesive to detect particles that adhere to it.  
4 to 6  
B—This method uses light transmitted through the tape adhesive after bonding to a base microscope slide, dissolving the tape backing, and a cover slide. The particles are embedded in the adhesive, and air bubbles are eliminated with acrylic mounting media.  
7 to 9  
C—This method uses light reflected off the tape adhesive to detect particles that adhere to it.  
10 to 12  
1.6 Units—The values stated in SI units are to be regarded as standard. The values given in parenthes...

  • Standard
    5 pages
    English language
    sale 15% off
  • Standard
    5 pages
    English language
    sale 15% off
ASTM
ASTM F3440-21(Test Method)
Standard Test Method for Corrosion of Low-Embrittling Zinc-Nickel Plate by Aircraft Maintenance Chemicals

SIGNIFICANCE AND USE
3.1 The data generated by this test method shall be used to determine whether low embrittling zinc-nickel plated parts are liable to be corroded or damaged by application of the test material during routine maintenance operations.
SCOPE
1.1 This test method is intended as a means of determining the corrosive effects of aircraft maintenance chemicals on low-embrittling zinc-nickel plating used on aircraft high-strength steel, under conditions of total immersion by quantitative measurements of weight change. Aircraft maintenance chemicals requiring this test method shall be determined by the cognizant engineering authority.  
1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 6 and 4.1.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM F1864-21(Test Method)
Standard Test Method for Dust Erosion Resistance of Optical and Infrared Transparent Materials and Coatings

SIGNIFICANCE AND USE
5.1 All materials on exterior aircraft surfaces are subject to abrasion from airborne particles of various sizes and shapes. Transparent materials are particularly vulnerable to abrasion, since their performance is based on their ability to transmit light with a minimal amount of scatter. Scratches, pitting, and coating removal and delamination as a result of abrasion may increase scatter, reduce transmission, and degrade the performance of transparent materials. Visually transparent materials are required for pilot and air crew enclosures, such as canopies, windshields, and viewpoints. Materials transparent in the IR region (8 to 12 μm) are required for tracking, targeting, and navigational instrumentation.  
5.2 This test method is intended to provide a calibrated and repeatable means of determining the relative abrasion resistance of materials and coatings for optical and IR transparent materials and coatings. The test parameters for this test method can be directly related to dust cloud densities and velocities to which transparent materials are exposed in the field.
SCOPE
1.1 This test method covers the resistance of transparent plastics and coatings used in aerospace windscreens, canopies, and viewports to surface erosion as a result of dust impingement. This test method simulates flight through a defined particle cloud environment by means of independent control of particle size, velocity, impact angle, mass loading, and test duration.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    9 pages
    English language
    sale 15% off
  • Standard
    9 pages
    English language
    sale 15% off
ASTM
ASTM F1105-09(2020)(Practice)
Standard Practice for Preparing Aircraft Cleaning Compounds, Liquid-Type, Temperature-Sensitive, or Solvent-Based, for Storage Stability Testing

SIGNIFICANCE AND USE
4.1 This practice determines the procedure to be used to ensure the long-term storage stability of aircraft cleaning and maintenance products in order to ensure their ability to meet the shelf-life requirements called up in specifications or contract documents. The subsequent testing requirements are detailed in the specification or contract.
SCOPE
1.1 This practice covers the determination of the stability in storage of liquid enzyme-based, terpene-based, and solvent-based chemical cleaning compounds used to clean the exterior surfaces of aircraft.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM F1104-02(2019)(Test Method)
Standard Test Method for Preparing Aircraft Cleaning Compounds, Liquid Type, Water Base, for Storage Stability Testing

SIGNIFICANCE AND USE
4.1 This test method determines the procedure to be used to ensure the long term storage stability of aircraft cleaning and maintenance products, in order to ensure their ability to meet the shelf-life requirements called up in specifications or contract documents. The subsequent testing requirements are detailed in the specification or contract.
SCOPE
1.1 This test method covers the determination of the stability in storage, of liquid, water-base chemical cleaning compounds, used to clean the exterior surfaces of aircraft.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM F485-08(2019)(Practice)
Standard Practice for Effects of Cleaners on Unpainted Aircraft Surfaces

SIGNIFICANCE AND USE
3.1 This practice is used to ensure that candidate aircraft surface cleaners do not leave a residue which, on drying, would leave a permanent stain requiring polishing to remove.
SCOPE
1.1 This practice describes the procedure used to determine the effect of cleaners on unpainted aircraft surfaces. Visual observation is used for determining streaking or permanent stains which require polishing to remove.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM F502-08(2019)(Test Method)
Standard Test Method for Effects of Cleaning and Chemical Maintenance Materials on Painted Aircraft Surfaces

ABSTRACT
This test method covers determination of the effects of cleaning solutions and chemical maintenance materials on painted aircraft surfaces. Materials used for testing shall be drawing pencils, fine sand paper, abrasive mats, acetone, MIL-PRF-85285 coating, MIL-PRF-23377 primer coating, chemical conversion materials, and distilled or deionized water. Plate and sheet specimens of aluminum alloy shall be examined under concentrated and diluted test solutions. Pencils preparation, panels preparations, testing, and hardness determination shall be done according to the indicated procedure.
SCOPE
1.1 This test method covers determination of the effects of cleaning solutions and liquid cleaner concentrates on painted aircraft surfaces (Note 1). Streaking, discoloration, and blistering may be determined visually. Softening is determined with a series of specially prepared pencils wherein determination of the softest pencil to rupture the paint film is made.  
Note 1: This test method is applicable to any paint film that is exposed to cleaning materials. MIL-PRF-85285 has been selected as a basic example. When other paint finishes are used, refer to the applicable material specification for panel preparation and system curing prior to testing.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
    3 pages
    English language
    sale 15% off
ASTM
ASTM A370-23(Test Method)
Standard Test Methods and Definitions for Mechanical Testing of Steel Products

SIGNIFICANCE AND USE
4.1 The primary use of these test methods is testing to determine the specified mechanical properties of steel, stainless steel, and related alloy products for the evaluation of conformance of such products to a material specification under the jurisdiction of ASTM Committee A01 and its subcommittees as designated by a purchaser in a purchase order or contract.  
4.1.1 These test methods may be and are used by other ASTM Committees and other standards writing bodies for the purpose of conformance testing.  
4.1.2 The material condition at the time of testing, sampling frequency, specimen location and orientation, reporting requirements, and other test parameters are contained in the pertinent material specification or in a general requirement specification for the particular product form.  
4.1.3 Some material specifications require the use of additional test methods not described herein; in such cases, the required test method is described in that material specification or by reference to another appropriate test method standard.  
4.2 These test methods are also suitable to be used for testing of steel, stainless steel and related alloy materials for other purposes, such as incoming material acceptance testing by the purchaser or evaluation of components after service exposure.  
4.2.1 As with any mechanical testing, deviations from either specification limits or expected as-manufactured properties can occur for valid reasons besides deficiency of the original as-fabricated product. These reasons include, but are not limited to: subsequent service degradation from environmental exposure (for example, temperature, corrosion); static or cyclic service stress effects, mechanically-induced damage, material inhomogeneity, anisotropic structure, natural aging of select alloys, further processing not included in the specification, sampling limitations, and measuring equipment calibration uncertainty. There is statistical variation in all aspects of mechanical testin...
SCOPE
1.1 These test methods2 cover procedures and definitions for the mechanical testing of steels, stainless steels, and related alloys. The various mechanical tests herein described are used to determine properties required in the product specifications. Variations in testing methods are to be avoided, and standard methods of testing are to be followed to obtain reproducible and comparable results. In those cases in which the testing requirements for certain products are unique or at variance with these general procedures, the product specification testing requirements shall control.  
1.2 The following mechanical tests are described:    
Sections  
Tension  
7 to 14  
Bend  
15  
Hardness  
16  
Brinell  
17  
Rockwell  
18  
Portable  
19  
Impact  
20 to 30  
Keywords  
32  
1.3 Annexes covering details peculiar to certain products are appended to these test methods as follows:    
Annex  
Bar Products  
Annex A1  
Tubular Products  
Annex A2  
Fasteners  
Annex A3  
Round Wire Products  
Annex A4  
Significance of Notched-Bar Impact Testing  
Annex A5  
Converting Percentage Elongation of Round Specimens to
Equivalents for Flat Specimens  
Annex A6    
Testing Multi-Wire Strand  
Annex A7  
Rounding of Test Data  
Annex A8  
Methods for Testing Steel Reinforcing Bars  
Annex A9  
Procedure for Use and Control of Heat-cycle Simulation  
Annex A10  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 When these test methods are referenced in a metric product specification, the yield and tensile values may be determined in inch-pound (ksi) units then converted into SI (MPa) units. The elongation determined in inch-pound gauge lengths of 2 in. or 8 in. may be report...

  • Standard
    51 pages
    English language
    sale 15% off
  • Standard
    51 pages
    English language
    sale 15% off