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ASTM A262-13
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
Automaticky přeložený název:
Standardní postupy pro zjišťování náchylnosti k mezikrystalové útoku v austenitické korozivzdorné oceli
NORMA vydána dne 1.5.2013
Informace o normě:
Označení normy: ASTM A262-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.5.2013
Kód zboží: NS-1792
Počet stran: 17
Přibližná hmotnost: 51 g (0.11 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM A262-13 :
Keywords:
austenitic stainless steel, copper sulfate, corrosion testing, etch structures, ferric sulfate, intergranular corrosion, nitric acid, oxalic acid, ICS Number Code 77.140.20 (Steels of high quality)
Doplňující informace
| 1. Scope | ||||||||||||||
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1.1 These practices cover the following five tests: 1.1.1 Practice A—Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), 1.1.2 Practice B—Ferric Sulfate–Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 1.1.3 Practice C—Nitric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 15 to 21, inclusive), 1.1.4 Practice E—Copper–Copper Sulfate–Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 1.1.5 Practice F—Copper–Copper Sulfate–50 % Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Molybdenum-Bearing Austenitic Stainless Steels (Sections 32 to 38, inclusive). 1.2 The oxalic acid etch test is a rapid method of identifying, by simple etching, those specimens of certain stainless steel grades that are essentially free of susceptibility to intergranular attack associated with chromium carbide precipitates. These specimens will have low corrosion rates in certain corrosion tests and therefore can be eliminated (screened) from testing as “acceptable.” The etch test is applicable only to those grades listed in the individual hot acid tests and classifies the specimens either as “acceptable” or as “suspect.” 1.3 The ferric sulfate–sulfuric acid test, the copper–copper sulfate–50 % sulfuric acid test, and the nitric acid test are based on weight loss determinations and, thus, provide a quantitative measure of the relative performance of specimens evaluated. In contrast, the copper–copper sulfate–16 % sulfuric acid test is based on visual examination of bend specimens and, therefore, classifies the specimens only as acceptable or nonacceptable. 1.4 The values stated in SI units
are to be regarded as standard. The inch-pound equivalents are in
parentheses and may be approximate.
1.5 This standard does not
purport to address all of the safety problems, if any, 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.
Standard Test Methods and Definitions for
Mechanical Testing of Steel Products Standard Practice for Cleaning,
Descaling, Pickling, and Passivation of Stainless Steel Parts,
Equipment, and Systems Standard Specification for Reagent
Water Standard Guide for Preparation of
Metallographic Specimens ASME Boiler & Pressure Vessel
Code, Reagent Chemicals, Specifications and Procedures Determination of Resistance to
Intergranular Corrosion of Stainless Steels--Part 2: Ferritic,
Austenitic, and Ferritic-Austenitic (Duplex) Stainless
Steels--Corrosion Test in Media Containing Sulfuric Acid |
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