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ASTM F1624-12

Standard Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading Technique

Automaticky přeložený název:

Standardní zkušební metoda pro měření vodíkové křehkosti prahu z oceli podle platového stupně Nakládací technika

NORMA vydána dne 1.8.2012

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Provedení	PDF - okamžité stažení - 1 932.50 Kč Tištěné - 1 932.50 Kč
Dostupnost	SKLADEM
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1 932.50 Kč

Informace o normě:

Označení normy: ASTM F1624-12
Poznámka: NEPLATNÁ
Datum vydání normy: 1.8.2012
Kód zboží: NS-50952
Počet stran: 12
Přibližná hmotnost: 36 g (0.08 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Anotace textu normy ASTM F1624-12 :

Keywords:
decreasing loading rate, delayed brittle failure, displacement control, fasteners, hydrogen embrittlement threshold, hydrogen induced stress cracking, rising step load, slow strain rate, ICS Number Code 77.040.10 (Mechanical testing of metals)

Doplňující informace

Significance and Use

5.1 This test method is used for research, design, service evaluation, manufacturing control, and development. This test method quantitatively measures stress parameters that are used in a design or failure analysis that takes into account the effects of environmental exposure including that which occurs during processing, such as plating (8) (ASTM STP 962).

5.2 For plating processes, the value of σ _{5.3 For quality control purposes, an
accelerated test is devised that uses a specified loading rate,
which is equal to or lower than the loading rate necessary to
determine the threshold stress (see 8.1).}

5.4 For fasteners, the value of σ_{5.5 For fasteners, the value of
σ_{5.6 To measure the relative
susceptibility of steels to hydrogen pickup from various
fabrication processes, a single, selected, discriminating rate is
used to rank the resistance of various materials to hydrogen
embrittlement.}}

5.7 Annex A1 describes the application of this standard test method to hydrogen embrittlement testing of fasteners.

1. Scope

1.1 This test method establishes a procedure to measure the susceptibility of steel to a time-delayed failure such as that caused by hydrogen. It does so by measuring the threshold for the onset of subcritical crack growth using standard fracture mechanics specimens, irregular-shaped specimens such as notched round bars, or actual product such as fasteners 1.2 This test method is used to evaluate quantitatively:

1.2.1 The relative susceptibility of steels of different composition or a steel with different heat treatments;

1.2.2 The effect of residual hydrogen in the steel as a result of processing, such as melting, thermal mechanical working, surface treatments, coatings, and electroplating;

1.2.3 The effect of hydrogen introduced into the steel caused by external environmental sources of hydrogen, such as fluids and cleaners maintenance chemicals, petrochemical products, and galvanic coupling in an aqueous environment.

1.3 The test is performed either in air, to measure the effect if residual hydrogen is in the steel because of the processing (IHE), or in a controlled environment, to measure the effect of hydrogen introduced into the steel as a result of the external sources of hydrogen (EHE) as detailed in ASTM STP 543.

1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5 This standard does not purport to address all of the safety concerns, 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.

2. Referenced Documents

E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1681-23	Standard Test Method for Determining Threshold Stress Intensity Factor for Environment-Assisted Cracking of Metallic Materials
E812-91(1997)	Standard Test Method for Crack Strength of Slow-Bend Precracked Charpy Specimens of High-Strength Metallic Materials (Withdrawn 2005)
B602-21	Standard Guide for Attribute Sampling of Metallic and Inorganic Coatings
J1237	Metric Thread Rolling Screws
G129-21	Standard Practice for Slow Strain Rate Testing to Evaluate the Susceptibility of Metallic Materials to Environmentally Assisted Cracking
G5-14(2021)	Standard Reference Test Method for Making Potentiodynamic Anodic Polarization Measurements
F2078-22	Standard Terminology Relating to Hydrogen Embrittlement Testing
F606-14	Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F519-23	Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments
E399-23	Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness of Metallic Materials
E8-04	Standard Test Methods for Tension Testing of Metallic Materials
E6-23a	Standard Terminology Relating to Methods of Mechanical Testing (Includes all amendments and changes 3/29/2023).
B18.18.4M	Inspection and Quality Assurance for Fasteners for Highly Specialized Engineering Applications, 1987
A574-21	Standard Specification for Alloy Steel Socket-Head Cap Screws
A490-14	Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength
E4-21	Standard Practices for Force Calibration and Verification of Testing Machines