ASTM F738M-02(2008)
(Specification)Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs (Withdrawn 2015)
Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs (Withdrawn 2015)
ABSTRACT
This specification covers the chemical and mechanical requirements for stainless steel metric bolts, screws, and studs with nominal thread diameters M1.6 through M36 and is intended for use in engineering applications requiring general corrosion resistance. Eight groups of stainless steel alloys are covered, including three austenitic (grades A1, A2, and A4), one ferritic (grade F1), three martensitic (grades C1, C3, and C4), and one precipitation hardening (grade P1). The chemical composition of the material shall conform to the requirements prescribed. Tensile strength, yield strength, elongation, and torsional strength shall be tested to meet the requirements prescribed.This specification covers the material, dimensions, and construction of 5 and 10-gal (20 and 40-L) tanks purchased to store and dispense lubricating oils. The tanks are industrial safety cans mounted on a T-bar bracket, complete with drip tray. Internal air pressure test shall be performed on the tank to meet the requirements prescribed. There should be no visible seam leakage when subjected to underwater or soap bubble test.
SCOPE
1.1 This specification covers the chemical and mechanical requirements for stainless steel metric bolts, screws, and studs with nominal thread diameters M1.6 through M36 and is intended for use in engineering applications requiring general corrosion resistance.
1.2 Eight groups of stainless steel alloys are covered, including three austenitic (Grades A1, A2, and A4), one ferritic (Grade F1), three martensitic (Grades C1, C3, and C4), and one precipitation hardening (Grade P1).
1.3 Twenty property classes are covered, including nine austenitic, two ferritic, eight martensitic, and one precipitation hardening. The property classes with the permissible alloys for each are listed in Table 1.
1.4 This specification is based in concept and content on ISO 3506. The chemical and mechanical requirements specified for all property classes, except as given in 1.4.1, are essentially identical with classes of the same designation in ISO 3506.
1.4.1 This specification includes all of the property classes covered in ISO 3506. Additionally, it includes property classes A1-70, A2-70, A4-70, A1-80, A2-80, and A4-80 for products with nominal thread diameters larger than M20; and four non-ISO property classes, C1-110, C4-110, C3-120; and P1-90.
1.5 Supplementary requirements of an optional nature are provided, applicable only when agreed upon between the manufacturer and the purchaser at the time of the inquiry and order.
1.6 Suitable nuts for use with bolts, screws, and studs included in this specification are covered by Specification F 836M.
1.7 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.8 The following safety hazards caveat pertains only to the test method described in this specification. This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
This specification covers the chemical and mechanical requirements for stainless steel metric bolts, screws, and studs with nominal thread diameters M1.6 through M36 and is intended for use in engineering applications requiring general corrosion resistance.
Formerly under the jurisdiction of Committee F16 on Fasteners, this specification was withdrawn in December 2014. This standard is being withdrawn without replacement due to its limited use by industry.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F738M −02(Reapproved 2008)
Standard Specification for
Stainless Steel Metric Bolts, Screws, and Studs
This standard is issued under the fixed designation F738M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 1.8 The following safety hazards caveat pertains only to
the test method described in this specification. This standard
1.1 This specification covers the chemical and mechanical
does not purport to address the safety problems associated with
requirements for stainless steel metric bolts, screws, and studs
its use. It is the responsibility of the user of this standard to
with nominal thread diameters M1.6 through M36 and is
establish appropriate safety and health practices and deter-
intended for use in engineering applications requiring general
mine the applicability of regulatory limitations prior to use.
corrosion resistance.
1.2 Eight groups of stainless steel alloys are covered,
2. Referenced Documents
includingthreeaustenitic(GradesA1,A2,andA4),oneferritic
2.1 ASTM Standards:
(GradeF1),threemartensitic(GradesC1,C3,andC4),andone
A276Specification for Stainless Steel Bars and Shapes
precipitation hardening (Grade P1).
A342/A342MTest Methods for Permeability of Weakly
1.3 Twenty property classes are covered, including nine
Magnetic Materials
austenitic, two ferritic, eight martensitic, and one precipitation
A380Practice for Cleaning, Descaling, and Passivation of
hardening.The property classes with the permissible alloys for
Stainless Steel Parts, Equipment, and Systems
each are listed in Table 1.
A484/A484MSpecification for General Requirements for
Stainless Steel Bars, Billets, and Forgings
1.4 This specification is based in concept and content on
ISO 3506. The chemical and mechanical requirements speci- A493Specification for Stainless Steel Wire and Wire Rods
for Cold Heading and Cold Forging
fied for all property classes, except as given in 1.4.1, are
essentially identical with classes of the same designation in A555/A555MSpecification for General Requirements for
Stainless Steel Wire and Wire Rods
ISO 3506.
1.4.1 This specification includes all of the property classes A564/A564M Specification for Hot-Rolled and Cold-
covered in ISO 3506.Additionally, it includes property classes Finished Age-Hardening Stainless Steel Bars and Shapes
A1-70, A2-70, A4-70, A1-80, A2-80, and A4-80 for products A582/A582MSpecification for Free-Machining Stainless
with nominal thread diameters larger than M20; and four Steel Bars
non-ISOpropertyclasses,C1-110,C4-110,C3-120;andP1-90. A751Test Methods, Practices, and Terminology for Chemi-
cal Analysis of Steel Products
1.5 Supplementary requirements of an optional nature are
D3951Practice for Commercial Packaging
provided, applicable only when agreed upon between the
E29Practice for Using Significant Digits in Test Data to
manufacturer and the purchaser at the time of the inquiry and
Determine Conformance with Specifications
order.
E353Test Methods for Chemical Analysis of Stainless,
1.6 Suitable nuts for use with bolts, screws, and studs
Heat-Resisting, Maraging, and Other Similar Chromium-
included in this specification are covered by Specification
Nickel-Iron Alloys
F836M.
F606MTest Methods for Determining the Mechanical Prop-
erties of Externally and Internally Threaded Fasteners,
1.7 Units—The values stated in SI units are to be regarded
Washers, and Rivets (Metric)
asstandard.Nootherunitsofmeasurementareincludedinthis
F836MSpecification for Style 1 Stainless Steel Metric Nuts
standard.
(Metric)
This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.04 on Nonferrous
Fasteners. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2008. Published August 2008. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1981. Last previous edition approved in 2002 as F738M–02. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F0738M-02R08. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F738M−02 (2008)
TABLE 1 Property Classes of Stainless Steel Bolts, Screws, and
Studs
Property Class Permissible Alloys
A
A1-50 304, 304L, 305
A1-70 384, 18–9LW, 302HQ
A1-80
A2-50
4. Ordering Information
A2-70 321, 347
A2-80
4.1 Orders for bolts, screws and studs under this specifica-
tion shall include the following:
A4-50
A4-70 316, 316L
4.1.1 Quantity (number of pieces of each item).
A4-80
4.1.2 Nameofitem(bolt,screw,stud,etc.;specifictypeand
B
F1-45 430 style; and reference to dimensional standard when appropri-
F1-60
ate).
4.1.3 Size (nominal diameter, thread pitch, length).
C1-50
C1-70 410 4.1.4 Property class.
C1-110
4.1.5 ASTM designation and date of issue. When date of
issue is not specified, fasteners shall be furnished to the latest
C3-80 431
C3-120
issue.
4.1.6 Supplementary requirements, if any (S1 through S5).
C4-50
4.1.7 Additional requirements, if any, to be specified on the
C4-70 416, 416Se
C4-110
purchase order:
4.1.7.1 Forming (5.2.1).
P1-90 630
4.1.7.2 Threading (5.2.2).
A
When approved by the purchaser, Alloys 303, 303Se, or XM1 may be furnished.
B
4.1.7.3 Alloy condition (5.2.3).
When approved by the purchaser, Alloy 430F may be furnished.
4.1.7.4 Protective finish (5.2.5).
4.1.7.5 Alloy selection (7.2).
4.1.7.6 Test report (9.2).
4.1.7.7 Heat number (9.1.1).
4.1.7.8 Additional testing (9.3).
F1470Practice for Fastener Sampling for Specified Me-
4.1.7.9 Inspection (11.1).
chanical Properties and Performance Inspection
4.1.7.10 Rejection (12.1).
2.2 ISO Standard:
3 4.1.7.11 Certification (13.1).
ISO3506 Corrosion-Resistant Stainless Steel Fasteners
4.1.7.12 Marking (14.1.3 and 14.1.4).
3. Classification NOTE 1—Examples:
10000 hex-cap screws, ANSI B18.2.3.1M, M12 × 1.75 × 50, Class
3.1 The designation of each property class is composed of
A2–70, furnish test report, ASTM F738, dated _____.
three parts: a letter, followed by a single digit, followed by 15000 oval-head machine screws,Type 1 recess,ANSI B18.6.7M, M3
× 0.5 × 25, Class C4-70, 416Se, Supplementary Requirement S2,ASTM
either two or three digits.
F738, dated _____.
3.1.1 The letter indicates the general composition type of
stainless steel as follows:
5. Materials and Manufacture
3.1.1.1 A for austenitic steels,
5.1 Materials:
3.1.1.2 F for ferritic steels,
5.1.1 Specifications A276, A493, A564/A564M, and A582/
3.1.1.3 C for martensitic steels, and
A582M are noted for information only as suitable sources of
3.1.1.4 P for precipitation-hardening steel.
materialforthemanufactureofbolts,hexcapscrews,andstuds
3.1.2 The first digit (1, 2, 3, or 4) indicates the alloy group.
to this specification.
The permissible alloys within each group are given in Table 1.
5.2 Manufacture:
3.1.3 The last two or three digits (50, 70, 110, etc.) indicate
5.2.1 Forming—Unless otherwise specified, fasteners shall
10% of the specified minimum tensile strength of the property
be cold-formed, hot-formed, or machined, at the option of the
class.
manufacturer.
3.1.4 For example, ClassA1-50 is an austenitic steel of any
5.2.2 Threads—Unless otherwise specified, threads shall be
one of six permitted alloys, and the manufactured fastener has
rolled or cut at the option of the manufacturer.
a minimum tensile strength of 500 MPa.
5.2.3 Condition—Fasteners shall be furnished in the condi-
tion specified for the property class in Table 2. If other
conditionsarerequired,theconditionandresultantmechanical
properties shall be as agreed upon between the manufacturer
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. and the purchaser.
F738M−02 (2008)
TABLE 2 Mechanical Property Requirements
Property Condi- Alloy/ Nominal Product Full Size Product Tests Machined Specimen Tests Hardness
A B
Class tion Mechanical Thread Length
Tensile Yield Exten- Torsional Tensile Yield Elonga- Vickers Rockwell
Property Diameter E
Strength, Strength, sion Strength, Strength, Strength, gation,
Marking
C C,D F
MPa MPa N·m MPa MPa %
min min min min min min min min max min max
A1-50 F 738A M1.6–M5 all 500 . . . . . . Table 6 . . . . . . . . . . . . 165 . . . B85
A2-50 AF F 738B M6–M36 all 500 210 0.6D . . . 500 210 30 . . . 165 . . . B85
A4-50 F 738C
A1-70 F 738D M1.6–M5 8D 700 . . . . . . Table 6 . . . . . . . . . 220 330 B96 C33
A2-70 CW F 738E M6–M20 8D 700 450 0.4 D . . . 650 400 20 220 330 B96 C33
A4-70 F 738F over 8D 550 300 0.2D . . . 520 270 25 160 310 B83 C31
M20–M36 x
M1.6–M5 8D 800 . . . . . . Table 6 . . . . . . . . . 240 350 C23 C36
A1-80 F 738G M6–M20 8D 800 600 0.3D . . . 780 600 12 240 350 C23 C36
A2-80 SH F 738H over 8D 700 500 0.2D . . . 680 480 15 220 330 B96 C33
M20–M24
A4-80 F 738J over 8D 650 400 0.2D . . . 620 370 20 200 310 B93 C30
M24–M30
over 8D 600 300 0.2D . . . 570 270 28 180 285 B89 C28
M30–M36
F1-45 AF F 738K M1.6–M5 all 450 . . . . . . . . . . . . . . . . . . . . . 165 . . . B85
M6–M36 all 450 250 0.2 D . . . 450 250 25 . . . 165 . . . B85
F1-60 CW F 738L M1.6–M5 8D 600 . . . . . . 180 285 B89 C28
M6–M36 8D 600 410 0.2D . . . 550 360 20 180 285 B89 C28
C1-50 F738M M1.6–M5 all 500 . . . . . . . 165 . B85
C4-50 A F 738N M6–M36 all 500 250 0.2D . 500 250 20 . 165 . B85
C1-70 F 738P M1.6–M5 all 700 . . . . . . 220 330 B96 C34
C4-70 H F 738R M6–M36 all 700 410 0.2 D . 700 410 18 220 330 B96 C34
C1-110 F 738S M1.6–M5 all 1100 . . . . . . 350 440 C36 C45
C4-110 HT F 738T M6–M36 all 1100 820 0.2 D . 1100 820 12 350 440 C36 C45
C3-80 H F 738U M1.6–M5 all 800 . . . . . . . . . . . . . . . . . . 240 340 C23 C35
M6–M36 all 800 640 0.2 D . . . 800 640 15 240 340 C23 C35
C3-120 HT F 738V M1.6–M5 all 1200 . . . . . . . . . . . . . . . . . . 380 480 C39 C48
M6–M36 all 1200 950 0.2D . . . 1200 950 10 380 480 C39 C48
P1-90 AH F 738W M1.6–M5 all 900 . . . . . . . . . . . . . . . . . . 285 370 C28 C38
M6–M36 all 900 700 0.2D . . . 900 700 16 285 370 C28 C38
A
Legend of conditions:
AF — headed and rolled from annealed stock and then reannealed.
CW — headed and rolled from annealed stock, thus acquiring a degree of cold work; products with nominal thread diameters larger than M20 may be hot-worked and
solution annealed.
SH — machined from strain-hardened stock or cold worked to develop the specified properties.
A — machined from annealed or solution-annealed stock, thus retaining the properties of the original material.
H — hardened and tempered at 565°C minimum.
HT — hardened and tempered at 275°C minimum.
AH — solution-annealed and age-hardened after forming.
B
For product lengths:
“all” means all lengths
“8D ” means 8 times nominal diameter maximum.
C
Tensile strength and yield strength values for full-size products of each property class are given in table on yield and tensile strength.
D
Yield strength is the stress at which an offset of 0.2 % gage lingth occurs.
E
Extension measurement is determined in accordance with the test procedure specified in 10.2.3.
F
Torsional strength requirements apply only to austenitic steel fasteners with nominal thread diameters M5 and smaller. Values are given in table on torsional strength.
5.2.4 Surface Finish—Fasteners shall have a surface finish 6. Heat Treatment
produced in accordance with Practice A380.
6.1 Austenitic Alloys, Grades A1, A2, and A4
5.2.5 Protective Finishes—Unless otherwise specified, fas-
teners shall be furnished without an additive chemical or
metallic finish.
F738M−02 (2008)
6.1.1 WhenConditionAFisspecified,thefasteners,follow- 7.3 Product analysis may be made by the purchaser from
ingmanufacture,shallbeannealedbyheatingto1040 630°C, finished fasteners representing each lot. The chemical compo-
at which time the chromium carbide will go into solution. The sition thus determined shall conform to the limits specified in
fasteners shall be held for a sufficient time and then cooled at Table 3 for the specific alloy within the product analysis
a rate sufficient to prevent precipitation of the carbide and to tolerances specified in Specification A555/A555M.
provide the properties specified in Table 2. 7.3.1 In the event of discrepancy, a referee analysis of
6.1.2 When Condition CW is specified, the austenitic alloy samples for each lot shall be made in accordance with 9.3.1.
shall be annealed as specified in 6.1.1, generally by the raw
8. Mechanical Properties
material manufacturer, and then cold-worked to develop the
8.1 Bolts, screws, and studs shall be tested in accordance
properties specified in Table 2.
with the mechanical testing requirements for the applicable
6.2 Ferritic Alloys, Grade F1
product type, property class, nominal thread diameter, length,
6.2.1 WhenConditionAFisspecified,theferriticalloyshall
and specified minimum tensile strength as specified in Table 4,
be heated to a temperature of 790 6 30°C, held for an
and shall meet the mechanical requirements specified for that
appropriate time, and then air-cooled to provide the properties
product in Tables 2-6.
specified in Table 2.
8.2 For products on which both hardness and tension tests
6.2.2 When Condition CW is specified, the ferritic alloy
are performed, acceptance based on tensile requirements shall
shall be annealed as specified in 6.2.1, generally by the raw
take precedence over low hardness readings.
material manufacturer and then cold-worked to develop the
properties specified in Table 2.
9. Number of Tests and Retests
6.3 Martensitic Alloys, Grades C1, C3, and C4
9.1 The requirements of this specification shall be met in
6.3.1 When Condition A is specified, the fasteners, follow-
continuous mass production for stock and the manufacturer
ing manufacture, shall be annealed to provide the properties
shall make sample inspections to ensure that the product
specified in Table 2.
conforms to the specified requirements. Additional tests of
6.3.2 When Condition H is specified, the fasteners shall be
individual shipments of material are not ordinarily necessary.
hardened and tempered by heating to 1010 6 30°C sufficient
9.1.1 Individual heats of steel are not identified in the
for austenitization, holding for at least ⁄2 h, rapid air- or
finished product.When specified in the p
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