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ASTM B473

This specification covers UNS N08020, UNS N08026, and UNS N08024 bar and wire other than required for reforging.The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

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Parameter Description

Chemical Composition


Element

Composition, %

UNS N08026

UNS N08020

UNS N08024

Carbon, max

0.03

0.07

0.03

Manganese, max

1.00

2.00

1.00

Phosphorus, max

0.03

0.045

0.035

Sulfur, max

0.03

0.035

0.035

Silicon, max

0.50

1.00

0.50

Nickel

33.00 to 37.20

32.00 to 38.00

35.00 to 40.00

Chromium

22.00 to 26.00

19.00 to 21.00

22.50 to 25.00

Molybdenum

5.00 to 6.70

2.00 to 3.00

3.50 to 5.00

Copper

2.00 to 4.00

3.00 to 4.00

0.50 to 1.50

Columbium (Nb) + tantalum

...

8 x carbon – 1.00

0.15 to 0.35

Nitrogen

0.10 to 0.16

...

...

Iron

remainderA

remainderA

remainderA

Note:

A. By difference

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Mechanical Properties

Condition

Diameter or Thickness, in. (mm)

Tensile Strength, min

Yield Strength, min

Elongation in 2 in. (50.8 mm), min, %

Reduction of area, min, %

ksi

MPa

ksi

MPa

Annealed, hot finished or cold finished

All

80

551

35

241

30.0B

50.0

Annealed, strain-hardened

Up to 2 (50.8) incl

90

620

60

415

15.0

40.0

Note:

A. For wire only, tensile strength 90 to 120.0 ksi (620 to 830 MPa); no requirements on yield strength, elongation, and reduction of area.
B. Cold-finished shapes require only 15 %, minimum, elongation.

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