ASTM B443-19 PDF

Full title and description

Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Plate, Sheet, and Strip — specification covering the chemical, mechanical, dimensional, and heat‑treatment requirements for rolled plate, sheet and strip of these nickel‑based alloys, including grade and condition designations for delivery and required testing/inspection.

Abstract

This specification (designation B443‑19) covers rolled UNS N06625 and UNS N06219 products furnished as plate, sheet, and strip. It defines grade/heat‑treatment conditions (for example N06625 grades: Grade 1 – annealed; Grade 2 – solution annealed), required chemical composition limits, mechanical property limits (tensile, yield, elongation), dimensional tolerances, sampling and test methods, and ordering information. The document uses inch‑pound units as the standard with SI conversions provided for information.

General information

• Status: Published.
• Publication date: Effective/Current edition approved November 1, 2019 (B443‑19).
• Publisher: ASTM International.
• ICS / categories: 77.150.40 (Nickel and chromium products).
• Edition / version: B443‑19 (current edition published 2019).
• Number of pages: 8 pages (typical published length for the B443‑19 release).

Scope

Specifies requirements for rolled nickel‑chromium‑molybdenum‑columbium alloy (UNS N06625) and nickel‑chromium‑molybdenum‑silicon alloy (UNS N06219) in plate, sheet, and strip form. N06625 is furnished in two grades/conditions (Grade 1 — annealed, for service temperatures up to about 1100°F / 593°C; Grade 2 — solution annealed, for higher‑temperature creep/rupture resistance). N06219 is furnished in the solution‑annealed condition only. The standard defines chemical composition limits, mechanical property requirements, dimensional and tolerancing requirements, sampling and inspection procedures, and references to applicable ASTM test methods and practices. Inch‑pound units are the normative units.

Key topics and requirements

• Chemical composition limits for UNS N06625 and UNS N06219 (elemental ranges and maximum impurities).
• Mechanical property requirements: tensile strength, yield strength, and elongation acceptance criteria by product form and thickness.
• Product forms and dimensional tolerances: plate, sheet, strip thicknesses, widths, edge condition, straightness, flatness, and length tolerances.
• Heat‑treatment / condition definitions (Grade 1 annealed; Grade 2 solution annealed for N06625; N06219 solution annealed).
• Required sampling, chemical analysis and mechanical tests, and referenced ASTM test methods (for example E8, E29, E1473, and related specifications).
• Ordering information and purchaser‑specified requirements (surface finish, acceptance tests, certification).
• Notes on applicability to ASME Boiler & Pressure Vessel Code (related SB‑443) and other code references where applicable.

Typical use and users

This specification is used by material suppliers, mill producers, fabricators, procurement/specification engineers, quality/inspection personnel, and designers in industries that require high‑performance nickel alloys — for example chemical processing, petrochemical, power generation, heat‑exchanger manufacture, aerospace and gas‑turbine component suppliers, and any application requiring corrosion or high‑temperature resistance where UNS N06625 or N06219 are specified.

Related standards

Commonly referenced standards and specifications include ASTM B446 (rod and bar of related alloys), ASTM B880 (general requirements for chemical check analysis limits for nickel alloys), ASTM test methods such as E8 (tension testing), E29 (significant digits/practices), E1473 (chemical analysis methods), and the ASME material designation/specification SB‑443 for code applications.

Keywords

Nickel alloy, UNS N06625, UNS N06219, nickel‑chromium‑molybdenum, columbium (niobium), silicon, plate, sheet, strip, heat treatment, annealed, solution‑annealed, high‑temperature alloy, B443‑19.

FAQ

Q: What is this standard?

A: ASTM B443‑19 is the ASTM International specification that defines the requirements for rolled nickel‑chromium‑molybdenum‑columbium alloy (UNS N06625) and nickel‑chromium‑molybdenum‑silicon alloy (UNS N06219) in plate, sheet, and strip forms.

Q: What does it cover?

A: It covers chemical composition limits, mechanical property requirements (tensile, yield, elongation), dimensional tolerances and product descriptions, heat‑treatment conditions and grade definitions, sampling and test procedures, and purchaser ordering information for these alloys. Inch‑pound units are normative; SI conversions are informational.

Q: Who typically uses it?

A: Material producers, suppliers, procurement/specification engineers, fabricators, inspection/QA staff, and designers in industries such as chemical processing, power generation, aerospace, and other high‑temperature or corrosion‑resistant applications.

Q: Is it current or superseded?

A: The B443‑19 edition was approved and made effective in 2019 (effective date November 1, 2019). As of the latest public record checks, a revision work item (WK90866) to revise B443‑19 was initiated in 2024, indicating a revision effort is in progress; users should confirm current status and any amendments with ASTM International before relying on a version for procurement or code compliance.

Q: Is it part of a series?

A: Yes — it is part of ASTM’s B‑series specifications for nonferrous metals and alloys. It is related to other ASTM nickel‑alloy specifications (for example B446, B880) and corresponds in part to ASME SB‑443 for code applications.

Q: What are the key keywords?

A: UNS N06625, UNS N06219, nickel‑chromium‑molybdenum, columbium/niobium, silicon, plate, sheet, strip, annealed, solution‑annealed, high‑temperature alloy, B443‑19.