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NEPLATNÁ ASTM F519-12a 15.11.2012 náhled

Doplňující informace

ASTM F519-12a

Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments (Includes all amendments And changes 12/18/2013).

Automaticky přeložený název:

Standardní zkušební metoda pro Všeobecné vodíkové křehkosti hodnocení pokovování / procesy nanášení a prostředí služeb

NORMA vydána dne 15.11.2012

Jazyk
Provedení	PDF - okamžité stažení - 2 123.10 Kč Tištěné - 2 123.10 Kč
Dostupnost	SKLADEM
Cena	2 123.10 Kč bez DPH
2 123.10 Kč

Informace o normě:

Označení normy: ASTM F519-12a
Poznámka: NEPLATNÁ
Datum vydání normy: 15.11.2012
Kód zboží: NS-55603
Počet stran: 18
Přibližná hmotnost: 54 g (0.12 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Anotace textu normy ASTM F519-12a :

Keywords:

cleaner, coating, delayed failure, fluids, hydrogen embrittlement, maintenance chemicals, plating/coating, steel, stress cracking, threshold, ICS Number Code 25.220.40 (Metallic coatings)

Doplňující informace

Significance and Use

5.1 Plating/coating Processes—This test method provides a means by which to detect possible hydrogen embrittlement of steel parts during manufacture by verifying strict controls during production operations such as surface preparation, pretreatments, and plating/coating. It is also intended to be used as a qualification test for new plating/coating processes and as a periodic inspection audit for the control of a plating/coating process.

5.2 Service Environment—This test method provides a means by which to detect possible hydrogen embrittlement of steel parts (plated/coated or bare) due to contact with chemicals during manufacturing, overhaul and service life. The details of testing in a service environment are found in 1.1 This test method describes mechanical test methods and defines acceptance criteria for coating and plating processes that can cause hydrogen embrittlement in steels. Subsequent exposure to chemicals encountered in service environments, such as fluids, cleaning treatments or maintenance chemicals that come in contact with the plated/coated or bare surface of the steel, can also be evaluated.

1.2 This test method is not intended to measure the relative susceptibility of different steels. The relative susceptibility of different materials to hydrogen embrittlement may be determined in accordance with Test Method F1459 and Test Method F1624.

1.3 This test method specifies the use of air melted AISI E4340 steel per SAE AMS-S-5000 (formerly MIL-S-5000) heat treated to 260 to 280 ksi (pounds per square inch ×1000) as the baseline. This combination of alloy and heat treat level has been used for many years and a large database has been accumulated in the aerospace industry on its specific response to exposure to a wide variety of maintenance chemicals, or electroplated coatings, or both. Components with ultimate strengths higher than 260 to 280 ksi may not be represented by the baseline. In such cases, the cognizant engineering authority shall determine the need for manufacturing specimens from the specific material and heat treat condition of the component. Deviations from the baseline shall be reported as required by 12.1.2. The sensitivity to hydrogen embrittlement shall be demonstrated for each lot of specimens as specified in 1.4 Test procedures and acceptance requirements are specified for seven specimens of different sizes, geometries, and loading configurations.

1.5 Pass/Fail Requirements—For plating/coating processes, specimens must meet or exceed 200 h using a sustained load test (SLT) at the levels shown in

Type

Item

Sampling of
Each Lot

Requirement/Method

Tensile Strength

4 each

Test Method E8. Tensile strength of each specimen must be within 10 ksi of the average.

Hardness^A

5 %

51 to 53 HRC per Test Methods E18.
Round the average of
three readings per
specimen per Practice
E29.

Dimensions

100 %

Meet tolerances of
corresponding
drawings. Notch
dimension verified with
shadow graphic
projection at 50 to
100× or equivalent.

Notched Fracture Strength (NFS)

10 ea

Test Methods E8/E8M. NFS of each specimen
must be within 10 ksi
of the average.

Self-loading
notched round
specimen bend
fixture,

10 ea

Alternate: The number of
turns of the loading
bolt, which is required
to produce fracture in
each specimen, must be
within 5 % of the
average.

Self-loading
notched C-Ring
bend fixture,

10 ea

Alternate: The change in
diameter at fracture
load for each specimen
must be within 0.008
inches of the average.

Item

Treatment A

Treatment B

Bath composition:

Range

Optimum

Cadmium (as CdO)

2.9 to 5.5 oz/gal (22 to 41 g/L)

4.5 oz/gal (33.7 g/L)

same as Treatment A

Total Sodium cyanide
(NaCN)

12.0 to 16.0 oz/gal (89.9 to 120 g/L)

14 oz/gal (104 g/L)

same as Treatment A

Ratio NaCN to CdO

2.8/1 to 6.0/1

3.0/1

same as Treatment A

12.0 or greater

12.0

same as Treatment A

Temperature

70–90°F (21–32°C)

75°F (24°C)

same as Treatment A

Sodium hydroxide
(NaOH)^A

1.0 to 3.2 oz/gal (7.5 to 24.0 g/L)

2.5 oz/gal (18.7 g/L)

same as Treatment A

Brightener such as
Colcad 100^B or
equivalent

Manufacturer's suggested range

None

Electroplating current

10 A/ft² (108 A/m²)

60 A/ft² (645 A/m ²)

Electroplating time

30 minutes

6 minutes

Baking

Baking temperature

375 ± 25°F (190 ± 14°C)

same as Treatment A

Baking time: Type 1
Specimen

Do Not Bake

23 h

Baking time: Type 2a
Specimen

8 h

23 h

Chromate Treatment^C

Yes

same as Treatment A

Type 1a, 1b, 1c, 1d, 1e

75 % of the tensile or bend NFS (

Type 2a

92 % of the Test Methods E8/E8M, E4 ultimate strength, obtained by deflecting a 2.300-inch diameter O-Ring specimen with a 2.525-inch stressing bar.

1.5.1 The loading conditions and pass/fail requirements for service environments are specified in 1.5.2 If approved by the cognizant engineering authority, a quantitative, accelerated (≤ 24 h) incremental step-load (ISL) test as defined in 1.6 This test method is divided into two parts. The first part gives general information concerning requirements for hydrogen embrittlement testing. The second is composed of annexes that give specific requirements for the various loading and specimen configurations covered by this test method (see section 1.7 The values stated in the foot-pound-second (fps) system 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.

1.8 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

AMS-S-5000	Steel, Chrome-Nickel-Molybdenum (E4340) Bars and Reforging Stock
MIL-PRF-16173	Corrosion Preventive Compound, Solvent Cutback, Cold-Application
Commercial Item Description (CID) A-A-55827	Chromium Trioxide, Technical
E4-21	Standard Practices for Force Calibration and Verification of Testing Machines
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E292-18	Standard Test Methods for Conducting Time-for-Rupture Notch Tension Tests of Materials
D1193-06(2018)	Standard Specification for Reagent Water
B851-04(2020)	Standard Specification for Automated Controlled Shot Peening of Metallic Articles Prior to Nickel, Autocatalytic Nickel, or Chromium Plating, or as Final Finish
B374-21	Standard Terminology Relating to Electroplating
E1823-23	Standard Terminology Relating to Fatigue and Fracture Testing
E1444-05	Standard Practice for Magnetic Particle Testing
E1417-05	Standard Practice for Liquid Penetrant Testing
E709-21	Standard Guide for Magnetic Particle Testing
F1459-06(2017)	Standard Test Method for Determination of the Susceptibility of Metallic Materials to Hydrogen Gas Embrittlement (HGE)
AMS 2759/11	Stress Relief of Steel Parts
AMS 2759/2	Heat Treatment of Low-Alloy Steel Parts Minimum Tensile Strength 220 ksi (1517 MPa) and Higher
AMS 2430 (R)	Shot Peening, Automatic
G38-01(2021)	Standard Practice for Making and Using C-Ring Stress-Corrosion Test Specimens
G5-14(2021)	Standard Reference Test Method for Making Potentiodynamic Anodic Polarization Measurements
F2078-22	Standard Terminology Relating to Hydrogen Embrittlement Testing
F1624-12(2018)	Standard Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading Technique
E18-22	Standard Test Methods for Rockwell Hardness of Metallic Materials
AMS-QQ-P-416	Plating, Cadmium (Electrodeposited)
E8/E8M-24	Standard Test Methods for Tension Testing of Metallic Materials
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
AMS 6360	Steel Tubing, Seamless 0.95Cr - 0.20Mo (0.28 - 0.33C) (SAE 4130) Normalized or Stress Relieved

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