ASTM B637-25 PDF
Name in English:
St ASTM B637-25
Name in Russian:
Ст ASTM B637-25
Original standard ASTM B637-25 in PDF full version. Additional info + preview on request
Full title and description
Standard Specification for Precipitation‑Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service (ASTM B637‑25). This specification defines chemical, mechanical, heat‑treatment, and test requirements for precipitation‑hardening and cold‑worked nickel alloy rod, bar, forgings, and forging stock intended for moderate to high temperature service.
Abstract
ASTM B637‑25 covers the composition limits, required heat treatments (solution, stabilizing, and precipitation‑hardening), and mandatory mechanical and metallurgical tests (tensile, hardness, and stress‑rupture where applicable) for precipitation‑hardening and cold‑worked nickel alloy bars and forgings. The standard lists applicable UNS alloy types and sets acceptance criteria for chemical analysis and mechanical properties to ensure suitability for elevated‑temperature service.
General information
- Status: Active standard (current edition B637‑25).
- Publication date: Approved May 1, 2025; published May 2025 (document last updated May 26, 2025).
- Publisher: ASTM International.
- ICS / categories: ICS 77 (Metallurgy); relevant subcategories include 77.120.40 (Nickel, chromium and their alloys) and 77.150.40 (Nickel and chromium products).
- Edition / version: B637‑25 (current edition).
- Number of pages: 7 pages (document summary / ASTM record).
Scope
The standard applies to hot‑ and cold‑worked precipitation‑hardenable nickel alloy rod, bar, forgings, and forging stock intended for moderate or high temperature service. It establishes chemical composition limits for listed UNS alloys, prescribes required thermal processing (anneal, solution treatment, stabilizing, precipitation hardening where applicable), and requires verification testing (chemical analysis, tensile, hardness, and stress‑rupture as specified). Units are inch‑pound as standard with SI conversions for information only.
Key topics and requirements
- Chemical composition limits and designated UNS alloy types (detailed in Table 1 of the standard).
- Required heat treatments: recommended annealing, solution treatment, stabilizing, and precipitation‑hardening procedures and acceptance criteria.
- Mechanical testing requirements: tensile testing (yield, ultimate, elongation, reduction of area), Brinell hardness limits, and stress‑rupture testing where applicable.
- Product forms covered: rod, bar, forgings, and forging stock (hot‑ and cold‑worked).
- Purchaser ordering information and optional purchaser‑specified tests (product/check analysis in accordance with related specifications such as ASTM B880 where applicable).
- Reference to applicability in pressure‑equipment codes (related ASME SB‑637 listing for Code applications).
Typical use and users
Used by material specifiers, manufacturers and fabricators of high‑temperature components (aerospace, power generation, petrochemical, oil & gas), inspection and quality engineers, procurement professionals specifying nickel alloy bars and forgings, and testing laboratories performing chemical and mechanical verification.
Related standards
Notable related documents include ASTM B880 (product/check analysis guidance), earlier editions of ASTM B637 (historical revisions), and ASME material listings such as SB‑637 for Boiler and Pressure Vessel Code applications. Other ASTM and industry standards governing testing methods and alloy designations are commonly referenced within B637‑25.
Keywords
nickel alloy; precipitation‑hardening; cold worked; bars; forgings; forging stock; heat treatment; tensile testing; Brinell hardness; stress‑rupture; UNS numbers; elevated temperature service.
FAQ
Q: What is this standard?
A: ASTM B637‑25 is the ASTM International specification that defines requirements for precipitation‑hardening and cold‑worked nickel alloy bars, forgings, and forging stock intended for moderate to high temperature service, including composition, heat treatment, and test criteria.
Q: What does it cover?
A: It covers chemical composition limits for listed UNS alloys, required thermal processing (solution, stabilizing, precipitation hardening), mechanical property requirements (tensile, hardness, stress‑rupture), applicable product forms (rod, bar, forgings, forging stock), and purchaser‑specified testing and ordering information.
Q: Who typically uses it?
A: Material engineers, procurement and quality teams, manufacturers of high‑temperature components (aerospace, power, petrochemical, oil & gas), testing laboratories, and code authorities referencing material specifications.
Q: Is it current or superseded?
A: Current — the active edition is B637‑25 (approved/published in May 2025). There are historical prior editions but B637‑25 is the current ASTM record as published in 2025.
Q: Is it part of a series?
A: It is part of ASTM’s suite of material specifications for non‑ferrous alloys and is referenced alongside related ASTM material and test standards (for example ASTM B880 for product analysis) and is cross‑referenced in industry code listings such as ASME SB‑637 where applicable.
Q: What are the key keywords?
A: Nickel alloy, precipitation‑hardening, cold worked, bars, forgings, heat treatment, tensile strength, Brinell hardness, stress‑rupture, UNS.