• Scope
• Chemical Composition
• Mechanical Properties
• Heat Treatment
• Tensile and Hardness Requirements^A
• Stress Rupture Requirements
• Number of Tests
• Test Methods
• Certification
• Referenced Documents

Scope

This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for moderate or high temperature service (Table 1).
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.

Chemical Composition

The material shall conform to the requirements as to chemical composition prescribed in Table 1.
If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis variations prescribed in Specification B880.

Note:

A. If determined.
B. The element shall be determined arithmetically by difference.

Mechanical Properties

1) Unless otherwise specified, the material shall be supplied in the cold worked or solution treated condition, suitable for subsequent age hardening.
The cold worked or solution treated material shall be capable of meeting the mechanical property requirements of Table 3, and the stress rupture lequirements of Table 4 (except alloys UNS N07022 , N09925 and N07725), following the precipitation hardening treatment described in Table 2.
3) When the material is to be supplied in the cold worked or solution treated plus aged condition, the requirements of Table 3 and Table 4 (except alloys UNS N07022, N09925 and N07725) shall apply, with the precipitation hardening treatment of Table 2, or as agreed upon between the purchaser and the manufacturer as part of the purchase contract,

Heat Treatment

Tensile and Hardness Requirements^A

Note:

A. The supplier shall demonstrate that the material will meet fully heat-treated properties after full heat treatment in accordance with Table 2.
B. Forgings.
C. Up to 2.50 in. [63.5 mm], exclusive.
D. 2.50 to 4.00 in. [63.5 to 101.6 mm], exclusive.
E. These values apply for tension specimens machined tangentially from near the center of large disk forgings over 50 in.2 [3225.8 mm2] in cross section or radially from rings 3 in. [76.2 mm] or more in thickness.
F. Cold worked, solution annealed and aged, 0.625 in. [15.9 mm] to 3 in. [76.2 mm], inclusive.
G. Hot worked, solution annealed and aged, 1 in. [25.4 mm] or over.

Stress Rupture Requirements

Number of Tests

Chemical Analysis—One test per lot.
Tension—One test per lot,
Hardness—One test per lot.
Stress-Rupture-One test per lot.

Test Methods

Determine the chemical composition and mechanical and other properties of the material as enumerated in this specification, in case of disagreement, in accordance with the following methods:

For purposes of determining compliance with the specified limits for requirements of the properties listed in the following table, an observed value or a calculated value shall be rounded in accordance with the rounding method of Practice E29,

Certification

When specified in the purchase order or contract, a producer's or supplier's certification shall be furnished to the purchaser that the material was manufactured, sampled, tested, and inspected in accordance with this specification and has been found to meet the requirements. When specified in the purchase order or contract, a report or the test results shall be furnished.

Referenced Documents