ASTM B581 - 17
Standard Specification for Nickel-Chromium-Iron-Molybdenum-Copper Alloy Rod
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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.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1. 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, % | |||||
| Alloy | Alloy | Alloy | Alloy | Alloy | Alloy | |
| Nickel | remainderA | 47.0–52.0 | remainderA | remainderA | 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 | remainderA | 18.0–21.0 | 13.0–17.0 | remainderA | remainderA |
| 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 |
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 |
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 | ||
| + | − | ||
| 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
ICS Code
ICS Number Code 77.150.40 (Nickel and chromium products)
UNSPSC Code
UNSPSC Code
Referencing This Standard
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DOI: 10.1520/B0581-17
Citation Format
ASTM B581-17, Standard Specification for Nickel-Chromium-Iron-Molybdenum-Copper Alloy Rod, ASTM International, West Conshohocken, PA, 2017, www.astm.org
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