ASTM B581-17

Standard Specification for Nickel-Chromium-Iron-Molybdenum-Copper Alloy Rod

Fecha:

2017-08-16 /Active

Abstract:

This specification covers nickel-chromium-iron-molybdenum-copper alloy rods (UNS N06007, N06975, N06985, N06030, and N08031), hot- or cold-finished, solution annealed, ground, or turned, for use in general corrosive service. Heat and product (check) analysis of the alloy shall conform to the chemical composition requirements prescribed for nickel, chromium, iron, molybdenum, copper, manganese, cobalt, carbon, tungsten, silicon, phosphorus, sulfur, columbium and tantalum, titanium, and nitrogen. The material shall conform to the specified straightness criteria and to the mechanical property requirements including tensile strength, yield strength, and elongation, as determined by tension test.

Scope:

1.1 This specification2 covers rod of Ni-Cr-Fe-Mo-Cu alloys (UNS N06007, N06975, N06985, N06030, N08031, and N08034)3 as shown in Tables 1-3, for use in general corrosive service.

TABLE 1 Chemical Requirements

Element	Composition Limits, %
Element	Alloy N06007	Alloy N06975	Alloy N06985	Alloy N06030	Alloy N08031	Alloy N08034
Nickel	remainder^A	47.0–52.0	remainder^A	remainder^A	30.0-32.0	33.5-35.0
Chromium	21.0–23.5	23.0–26.0	21.0–23.5	28.0–31.5	26.0-28.0	26.0-27.0
Iron	18.0–21.0	remainder^A	18.0–21.0	13.0–17.0	remainder^A	remainder^A
Molybdenum	5.5–7.5	5.0–7.0	6.0–8.0	4.0–6.0	6.0-7.0	6.0-7.0
Copper	1.5–2.5	0.70–1.20	1.5–2.5	1.0–2.4	1.0-1.4	0.5-1.5
Manganese	1.0–2.0	1.0 max	1.0 max	1.5 max	2.0 max	1.0-4.0
Cobalt, max	2.5	...	5.0 max	5.0 max	...	...
Carbon, max	0.05	0.03	0.015 max	0.03 max	0.015	0.01
Tungsten	1.0 max	...	1.5 max	1.5–4.0	...	...
Silicon, max	1.0	1.0	1.0 max	0.8 max	0.3	0.1
Phosphorus, max	0.04	0.03	0.04 max	0.04 max	0.020	0.020
Sulfur, max	0.03	0.03	0.03 max	0.02 max	0.010	0.010
Columbium + tantalum	1.75–2.50	...	0.50 max	0.30–1.50	...	...
Titanium	...	0.7–1.5	...	...	...	...
Nitrogen	0.15-0.25	...	...	...	...	0.10-0.25
Aluminum						0.3

(A) See 13.1.1.

TABLE 2 Mechanical Property Requirements

Alloy	Specified Diameter, in. (mm)	Tensile Strength min, psi (MPa)	Yield Strength (0.2 % Offset), min, psi (MPa)	Elongation in 2 in. or 50.8 mm or 4D ^A min
N06007	⁵/₁₆ to ³/₄ (7.94 to 19.05), incl	90 000 (621)	35 000 (241)	35
	Over ³/₄ to 3¹/₂ (19.05 to 88.9), incl	85 000 (586)	30 000 (207)	30
N06975	⁵/₁₆ to 3¹/₂ (7.94 to 88.9), incl	85 000 (586)	32 000 (221)	40
N06985	⁵/₁₆ to ³/₄ (7.9 to 19.05), incl	90 000 (621)	35 000 (241)	45
	Over ³/₄ to 3¹/₂ (19.05 to 88.9), incl	85 000 (586)	30 000 (207)	35
N06030	...	85 000 (586)	35 000 (241)	30
N08031	All sizes	94 000 (648)	40 000 (276)	40
N08034	All sizes	94 000 (650)	40 000 (280)	40

(A) D refers to the diameter of the tension specimen.

TABLE 3 Permissible Variations in Diameter and Out-of-Roundness of Rods

Specified Diameter, in. (mm)	Permissible Variations, in. (mm)
	Diameter		Out-of-Roundness, max
	+	−	Out-of-Roundness, max
Hot-Finished, Annealed, and Descaled Rods
⁵/₁₆ to ⁷/₁₆ (7.94 to 11.11), incl	0.012 (0.305)	0.012 (0.305)	0.018 (0.457)
Over ⁷/₁₆ to ⁵/₈ (11.11 to 15.87), incl	0.014 (0.355)	0.014 (0.355)	0.020 (0.508)
Over ⁵/₈ to ³/₄ (15.87 to 19.05), excl	0.016 (0.406)	0.016 (0.406)	0.024 (0.610)
Hot-Finished, Annealed, and Ground or Turned Rods
³/₄ to 3¹/₂ (19.05 to 88.9), incl	0.010 (0.254)	0	0.008 (0.203)

1.2 The following products are covered under this specification:

1.2.1 Rods ⁵/₁₆ to ³/₄ in. (7.94 to 19.05 mm) excl in diameter, hot- or cold-finished, solution annealed and pickled or mechanically descaled.

1.2.2 Rods ³/₄ to 3¹/₂ in. (19.05 to 88.9 mm) incl in diameter, hot- or cold-finished, solution annealed, ground or turned.

1.3 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.

1.4 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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health and environmental practices, and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords:

rod; N06007; N06975; N06985; N06030; N08031; N08034;

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