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ASTM A370-12a
Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Стандартные методы испытаний и определения для механических испытаний стальной продукции
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Разработчик:
Зарубежные/ASTM
ICS:
77.040.10 Mechanical testing of metals / Механические испытания металлов77.140.01 Iron and steel products in general / Продукция из чугуна и стали в целом
Сборник (ASTM):
01.03 Steel--Plate, Sheet, Strip, Wire; Stainless Steel Bar / Сталь - Плиты, листы, штрипсы, проволока; сортовой прокат из нержавеющей стали01.02 Ferrous Castings; Ferroalloys / Стальное литье, Ферросплавы01.01 Steel--Piping, Tubing, Fittings / Сталь - Система трубопроводов, Трубы, Фитинги01.04 Steel--Structural, Reinforcing, Pressure Vessel, Railway / Сталь - Конструкционная, арматурная, для сосудов под давлением, рельсовая01.05 Steel--Bars, Forgings, Bearing, Chain, Tool / Сталь - Прутья, Поковки и Заготовки, Балки
Тематика:
Steel--Structural, Tubes, Plate, Coated
Описание
Значение и использование

3.1 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.

3.1.1 These test methods may be and are used by other ASTM Committees and other standards writing bodies for the purpose of conformance testing.

3.1.2 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.

3.1.3 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.

3.2 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.

3.2.1 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 testing and variations in test results from prior tests are expected. An understanding of possible reasons for deviation from specified or expected test values should be applied in interpretation of test results.

Область применения

1.1 These test methods2 cover procedures and definitions forthe mechanical testing of steels, stainless steels, and relatedalloys. The various mechanical tests herein described are used todetermine properties required in the product specifications.Variations in testing methods are to be avoided, and standardmethods of testing are to be followed to obtain reproducible andcomparable results. In those cases in which the testingrequirements for certain products are unique or at variance withthese general procedures, the product specification testingrequirements shall control.

1.2 The followingmechanical tests are described:

Sections

Tension

6 to 14

Bend

15

Hardness

16

 Brinell

17

 Rockwell

18

 Portable

19

Impact

20 to 29

Keywords

30


1.3 Annexes coveringdetails peculiar to certain products are appended to these testmethods as follows:

Annex

BarProducts

A1.1

TubularProducts

AnnexA2

Fasteners

AnnexA3

Round WireProducts

AnnexA4

Significanceof Notched-Bar Impact Testing

AnnexA5

ConvertingPercentage Elongation of Round Specimens to
 Equivalents for Flat Specimens

AnnexA6

TestingMulti-Wire Strand

AnnexA7

Rounding ofTest Data

AnnexA8

Methods forTesting Steel Reinforcing Bars

AnnexA9

Procedure forUse and Control of Heat-Cycle Simulation

AnnexA10


1.4 The values stated ininch-pound units are to be regarded as the standard.

1.5 When this document isreferenced in a metric product specification, the yield and tensilevalues may be determined in inch-pound (ksi) units then convertedinto SI (MPa) units. The elongation determined in inch-pound gaugelengths of 2 or 8 in. may be reported in SI unit gauge lengths of50 or 200 mm, respectively, as applicable. Conversely, when thisdocument is referenced in an inch-pound product specification, theyield and tensile values may be determined in SI units thenconverted into inch-pound units. The elongation determined in SIunit gauge lengths of 50 or 200 mm may be reported in inch-poundgauge lengths of 2 or 8 in., respectively, as applicable.

1.6 Attention is directedto ISO/IEC 17025 when there may be a need for information on criteriafor evaluation of testing laboratories.

1.7 This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user ofthis standard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations prior touse.

Ключевые слова:
bend test; Brinell hardness; Charpy impact test; elongation; FATT (Fracture Appearance Transition Temperature); hardness test; portable hardness; reduction of area; Rockwell hardness; tensile strength; tension test; yield strength;