NICKEL-CHROMIUM-MOLYBDENUM ALLOY

Inconel 625

Inconel 625 is a nickel-chromium-molybdenum alloy strengthened primarily by solid-solution effects from molybdenum and niobium. It combines high strength with excellent resistance to pitting, crevice corrosion and many aggressive environments.

BSI specificationBS 3072Material identificationNA21 / N06625

MATERIAL OVERVIEW

Inconel 625 Grade Information

Legacy British sheet and plate specification with manufacturer-documented nickel and nickel-alloy designations.

Material specification	BS 3072
Material identification	NA21 / N06625
Product / supply condition	Historical sheet and plate; confirm temper and heat treatment.

CHEMICAL COMPOSITION

Inconel 625 Chemical Composition

Manufacturer alloy composition limits, mass %; selected elements only. These are not the complete acceptance limits of the standard on this page.

Manufacturer grade reference composition — selected entries
Element / description	Mass % / reference value
Ni	58.0 min
Cr	20.0–23.0
Mo	8.0–10.0
Nb + Ta	3.15–4.15
C	0.10 max

MECHANICAL PROPERTIES

Inconel 625 Mechanical Properties

Published reference values for the stated form and condition. Typical values are not specification acceptance limits.

Manufacturer reference properties — stated product and test condition
Product form / condition	Tensile (MPa)	0.2% proof / yield (MPa)	Elongation (%)	Data basis
Annealed sheet / strip; room temperature	827–1034	414–621	30–55	Manufacturer nominal ranges, not AMS acceptance values.
Solution-treated plate (manufacturer groups rod, bar and plate); room temperature	724–896	290–414	40–65	Manufacturer nominal ranges; applies to stated condition only.

Manufacturer reference data is shown for comparison. Use the selected BS 3072 edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.

SPECIFICATION REFERENCE

BS 3072 Grade Reference

NA21 / N06625

Material specification	BS 3072
Source edition	BS 3072:1989
Publication status	Withdrawn — 2 August 2013
Product / supply condition	Historical sheet and plate; confirm temper and heat treatment.
Specification information	Use these entries to interpret historical orders. BS 3072 sheet and plate coverage must not be extended to strip; the historical strip reference is BS 3073.
Comparison tables	View the BS 3072 comparison tables
Material overview	View Inconel 625 in Materials
Source reference	BSI — BS 3072:1989 publisher record and withdrawal status
Source reference	Special Metals — Nickel Alloy Handbook (legacy British designations)
Source reference	Special Metals — Nickel 200 and 201 technical bulletin
Source reference	Special Metals — MONEL alloy 400 technical bulletin, composition, mechanical data and product specifications
Source reference	Special Metals — INCONEL alloy 600 technical bulletin, Tables 1 and 6; product specifications
Source reference	Special Metals — INCONEL alloy 625 technical bulletin, Tables 1 and 5; product specifications
Source reference	Special Metals — INCOLOY alloy 825 technical bulletin, Tables 1 and 5; product specifications

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