ASTM C774-88(2000)

Standard Test Method for Yield Strength of Enameling Steels After Straining and Firing

SCOPE
1.1 This test method covers determination of the yield strength of steel specimens after simulated forming and enamel firing operations.
1.2 The values stated in inch-pound units are to be regarded as the standard. SI units are provided for information only.
1.3  This standard does not purport to address all of 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-1999
• ICS: 25.220.50 - Enamels
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems

Relations

• Replaces: ASTM C774-88(1995) - Standard Test Method for Yield Strength of Enameling Steels After Straining and Firing
• Effective Date: 01-Jan-2000
• Replaced By: ASTM C774-88(2006) - Standard Test Method for Yield Strength of Enameling Steels After Straining and Firing
• Effective Date: 01-Apr-2006
• Referred By: ASTM C286-22 - Standard Terminology Relating to Porcelain Enamel and Ceramic-Metal Systems
• Effective Date: 01-Jan-2000

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C774–88(Reapproved 2000)
Standard Test Method for
Yield Strength of Enameling Steels After Straining and
Firing
This standard is issued under the fixed designation C 774; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope enameling are subject to grain growth in critically strained
areas resulting in loss of strength.
1.1 This test method covers determination of the yield
5.2 This may lead to easy deformation of the steel and
strength of steel specimens after simulated forming and enamel
damage to the porcelain enamel coating.
firing operations.
5.3 This test method may be correlated with transit or use
1.2 The values stated in inch-pound units are to be regarded
tests to evaluate the suitability of steel for porcelain enameled
as the standard. The values given in parentheses are for
ware.
information only.
1.3 This standard does not purport to address all of the
6. Apparatus
safety concerns, if any, associated with its use. It is the
6.1 Shear for cutting blanks.
responsibility of the user of this standard to establish appro-
6.2 Equipment for cutting or machining tension specimens.
priate safety and health practices and determine the applica-
6.3 Gage, 2-in. (50.8-mm), for marking tension specimens.
bility of regulatory limitations prior to use.
6.4 Tension-Testing Equipment, as described inTest Method
2. Referenced Documents A 370.
6.5 Specimen-Supporting Rack, slotted to support speci-
2.1 ASTM Standards:
mens on edge spaced 1 in. (25.4 mm) apart.
A 370 Test Methods and Definitions for MechanicalTesting
6.6 Furnace, capable of heating the test specimens and their
of Steel Products
supporting rack to the firing temperature in 2 min.
E 8 Test Methods forTensionTesting of Metallic Materials
7. Reagents and Materials
3. Definition
7.1 Sheet Steel, sufficient in size to provide the test speci-
3.1 quarter lines—imaginary lines parallel to the direction
men, described in Section 8.
of rolling, positioned at a distance from the sheet mill edge
7.2 Solvent, such as acetone or isopropyl alcohol.
equal to one quarter of the sheet width.
7.3 Hydrochloric Acid (1+1)—Dilute 1 volume of concen-
4. Summary of Test Method trated hydrochloric acid (HCl, sp gr 1.19) with 1 volume of
water.
4.1 Representative sheet-steel specimens are selected,
strained in tension to simulate forming, heat treated to simulate
8. Sampling
enamel firing, and tension tested for determination of yield
8.1 Obtain ten test samples, each approximately 1 by 9 in.
strength.
(25 by 229 mm), from within the quarter lines of the sheet
5. Significance and Use
sample, the long dimension being in the direction of rolling.
5.1 In the manufacture of porcelain enameled ware, sheet
9. Procedure
steel is subjected to forming operations and subsequently to
9.1 Remove burrs from the cut edges of the test samples.
firing of the enamel at temperatures, typically, of 1400 to
9.2 Mark 2-in. (50.8-mm) gage lengths in the middle of the
1550°F (760 to 844°C). Some steels used for porcelain
test samples and strain in tension. Maintain a minimum of 1 in.
(25.4 mm) of length between the grips of the tension-testing
This test method is under the jurisdiction ofASTM Committee B08 on Metallic
machine and the gage marks.
and Inorganic Coatings
...