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ASTM B581-02(2008)

ASTM B581-02(2008)

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

2013-02-26 /Historical
Superseeded by:

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.


1.1 This specification covers rod of Ni-Cr-Fe-Mo-Cu alloys (UNS N06007, N06975, N06985, N06030, and N08031)* as shown in Tables 1-2, for use in general corrosive service.

1.2 The following products are covered under this specification:

1.2.1 Rods 5/16 to ¾ 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 ¾ to 3½ 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 Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

TABLE 1 Chemical Requirements

ElementComposition Limits, %
Alloy N06007Alloy N06975Alloy N06985Alloy N06030Alloy N08031
Nickel remainderA47.052.0remainderAremainderA30.0-32.0
Chromium 21.023.5 23.026.0 21.023.5 28.031.526.0-28.0
Iron 18.021.0remainderA18.
Molybdenum5.57.5 5.07.0 6.08.0 4.06.030.-7.0
Copper 1.52.5 0.701.20 1.52.5
Manganese 1.02.0 1.0 max 1.0 max 1.5 max2.0 max
Cobalt, max2.5... 5.0 max 5.0 max...
Carbon, max0.050.030.015 max 0.03 max0.015
Tungsten 1.0 max... 1.5 max 1.54.0...
Silicon, max1.0 1.0 1.0 max 0.8 max0.3
Phosphorus, max 0.04 0.03 0.04 max 0.04 max0.020
Sulfur, max 0.03 0.03 0.03 max 0.02 max0.010
Columbium + tantalum 1.752.50 ... 0.50 max 0.301.50...
Titanium ... 0.71.5... ......

A See 13.1.1.

TABLE 2 Permissible Variations in Diameter and Out-of-Roundness of Rods

Specified Diameter, in. (mm) Permissible Variations, in. (mm)
Diameter Out-of-Roundness, max
Hot-Finished, Annealed, and Descaled Rods
5/16 to 7/16 (7.94 to 11.11), incl0.012 (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 ¾ (15.87 to 19.05), excl0.016 (0.406)0.016 (0.406)0.024 (0.610)
Hot-Finished, Annealed, and Ground or Turned Rods
¾ to 3½ (19.05 to 88.9), incl0.010 (0.254)00.008 (0.203)
rod; N06007; N06975; N06985; N06030; N0803; Corrosive service applications--bars/rods/shapes; Nickel alloy rod/bar/wire--specifications; Nickel-chromium alloys--specifications; Nickel-chromium-iron-molybdenum-copper alloys--specifications; UNS N06007 (Ni-Cr alloy, Hastelloy G); UNS N06030 (wrought Ni-Cr-Fe-Mo-Cu alloy, Hastelloy G-30); UNS N06975 (Ni-Cr alloy, Hastelloy G-2); UNS N06985 (Ni-Cr alloy ERNiCrMo-9, Hastelloy G-3); UNS N08031 (Ni-Fe-Cr-Mo-Cu, Alloy No. 31)
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