ASTM C774-88(1995)

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
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems

Relations

• Replaced By: ASTM C774-88(2000) - Standard Test Method for Yield Strength of Enameling Steels After Straining and Firing
• Effective Date: 01-Jan-2000
• 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 774 – 88 (Reapproved 1995)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
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 5.2 This may lead to easy deformation of the steel and
damage to the porcelain enamel coating.
1.1 This test method covers determination of the yield
5.3 This test method may be correlated with transit or use
strength of steel specimens after simulated forming and enamel
tests to evaluate the suitability of steel for porcelain enameled
firing operations.
ware.
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
6. Apparatus
information only.
6.1 Shear for cutting blanks.
1.3 This standard does not purport to address all of the
6.2 Equipment for cutting or machining tension specimens.
safety concerns, if any, associated with its use. It is the
6.3 Gage, 2-in. (50.8-mm), for marking tension specimens.
responsibility of the user of this standard to establish appro-
6.4 Tension-Testing Equipment, as described in Test Method
priate safety and health practices and determine the applica-
A 370.
bility of regulatory limitations prior to use.
6.5 Specimen-Supporting Rack, slotted to support speci-
2. Referenced Documents mens on edge spaced 1 in. (25.4 mm) apart.
6.6 Furnace, capable of heating the test specimens and their
2.1 ASTM Standards:
supporting rack to the firing temperature in 2 min.
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
7. Reagents and Materials
E 8 Test Methods for Tension Testing of Metallic Materials
7.1 Sheet Steel, sufficient in size to provide the test speci-
3. Definition men, described in Section 8.
7.2 Solvent, such as acetone or isopropyl alcohol.
3.1 quarter lines—imaginary lines parallel to the direction
7.3 Hydrochloric Acid (1+1)—Dilute 1 volume of concen-
of rolling, positioned at a distance from the sheet mill edge
trated hydrochloric acid (HCl, sp gr 1.19) with 1 volume of
equal to one quarter of the sheet width.
water.
4. Summary of Test Method
8. Sampling
4.1 Representative sheet-steel specimens are selected,
8.1 Obtain ten test samples, each approximately 1 by 9 in.
strained in tension to simulate forming, heat treated to simulate
(25 by 229 mm), from within the quarter lines of the sheet
enamel firing, and tension tested for determination of yield
sample, the long dimension being in the direction of rolling.
strength.
9. Procedure
5. Significance and Use
9.1 Remove burrs from the cut edges of the test samples.
5.1 In the manufacture of porcelain enameled ware, sheet
9.2 Mark 2-in. (50.8-mm) gage lengths in the middle of the
steel is subjected to forming operations and subsequently to
test samples and strain in tension. Maintain a minimum of 1 in.
firing of the enamel at temperatures, typically, of 1400 to
(25.4 mm) of length between the grips of the ten
...