ASTM B446-24 PDF
Name in English:
St ASTM B446-24
Name in Russian:
Ст ASTM B446-24
Original standard ASTM B446-24 in PDF full version. Additional info + preview on request
Full title and description
Standard Specification for Nickel‑Chromium‑Molybdenum‑Niobium Alloy (UNS N06625), Nickel‑Chromium‑Molybdenum‑Silicon Alloy (UNS N06219), and Nickel‑Chromium‑Molybdenum‑Tungsten Alloy (UNS N06650) Rod and Bar. The specification defines permitted compositions, product forms (hot‑worked rod and bar; cold‑worked rod), required heat treatments, mechanical property requirements, and dimensional/tolerance criteria for these nickel‑base alloys.
Abstract
This ASTM standard (B446‑24) covers three nickel‑base alloy grades in rod and bar form (UNS N06625, N06219, N06650). It specifies chemical composition limits, required condition (solution annealed or other heat treatments as applicable), room‑temperature tensile property requirements, dimensions, tolerances, and typical test requirements used for acceptance of material lots supplied to the standard.
General information
- Status: Published / Active
- Publication date: November 1, 2024
- Publisher: ASTM International
- ICS / categories: 77.150.40 (Nickel and chromium products)
- Edition / version: B446‑24 (2024 edition)
- Number of pages: 6
Scope
The standard applies to hot‑worked rod and bar and to cold‑worked rod of the three listed nickel‑base alloys. It covers required chemical composition ranges for specified elements, acceptance criteria for room‑temperature tensile properties (tensile strength, yield, elongation), required heat treatment/condition for delivery, and dimensional and straightness tolerances for supplied bars and rods. Alloys UNS N06219 and UNS N06650 are typically supplied in the solution‑annealed condition; UNS N06625 (columbium/niobium bearing) is covered for both hot‑worked and cold‑worked conditions as noted in the tables. The specification references commonly used test methods for mechanical and chemical analyses to verify conformance.
Key topics and requirements
- Designated alloys and UNS numbers: N06625, N06219, N06650.
- Chemical composition limits for C, Mn, Si, P, S, Cr, Nb (columbium), Ta, Co, Mo, Fe, Al, Ti, Cu, Ni, W, N and others where applicable.
- Required product forms and conditions: hot‑worked rod and bar; cold‑worked rod; solution annealed where specified.
- Mechanical property acceptance at room temperature (minimum tensile strength, yield, elongation).
- Dimensional tolerances, lengths, diameters/thicknesses, and straightness requirements for bars and rods.
- Referenced test methods for tension, hardness, and chemical analysis (e.g., ASTM test methods commonly referenced by product specifications).
Typical use and users
Engineers, purchasers, and quality managers in industries that require corrosion‑resistant, high‑strength nickel alloys — including chemical processing, petrochemical/refining, power generation, marine, and aerospace — use this specification when specifying and accepting rod and bar made from the listed UNS alloys. Producers of nickel‑base bars/rod, material testing labs, and fabricators reference B446 when producing or qualifying material for supply and downstream manufacturing.
Related standards
Related and cross‑referenced standards include earlier and related ASTM product specifications for nickel and nickel alloys (previous B446 editions), general requirements for nickel and nickel alloys (e.g., B829, B880), and test method standards frequently referenced for verification (for example, tensile and mechanical test methods and chemical analysis standards). Product purchasers often consult companion ASTM and ASME product specifications and ASTM test standards when applying B446 requirements to procurement and inspection plans.
Keywords
ASTM B446, nickel alloy, rod, bar, UNS N06625, UNS N06219, UNS N06650, columbium/niobium, solution annealed, chemical composition, tensile properties, dimensional tolerances.
FAQ
Q: What is this standard?
A: ASTM B446‑24 is the 2024 edition of the ASTM product specification that defines requirements for three nickel‑base alloys supplied as rod and bar (UNS N06625, N06219, N06650).
Q: What does it cover?
A: It covers permitted chemical compositions, required heat‑treatment/condition, room‑temperature tensile acceptance criteria, dimensional and straightness tolerances, and typical testing/inspection requirements for acceptance of rod and bar made from the listed alloys.
Q: Who typically uses it?
A: Material suppliers (mill producers), buyers and procurement teams, QA/QC laboratories, metallurgists, and design/fabrication engineers in industries that use high‑performance nickel alloys.
Q: Is it current or superseded?
A: As of the publication data shown above, B446‑24 is the current published edition (2024). Users should verify with ASTM International for the very latest status or any subsequent revisions or withdrawals before placing orders or performing acceptance tests.
Q: Is it part of a series?
A: B446 is part of ASTM's family of nickel and nickel‑alloy product specifications and is referenced alongside other ASTM/ASME specifications and test methods that govern nickel alloy product requirements and testing.
Q: What are the key keywords?
A: Nickel alloy, rod, bar, UNS N06625, UNS N06219, UNS N06650, composition limits, tensile properties, solution annealed, dimensional tolerances.