Grade overview

The alloy is martensitic after solution treatment and strengthened by copper-rich precipitation during aging.

Typical applications

Shafts, valve parts, aerospace hardware, pump components, molds, fasteners and high-strength stainless machinery parts.

Equivalent / related designations

UNS S17400 and EN 1.4542 are widely used designations. Mechanical properties depend strongly on aging condition such as H900, H1025 or H1150.

Common manufacturers and supply

Produced by specialty stainless and aerospace alloy mills including Carpenter Technology, Böhler/voestalpine, Aubert & Duval and others.

Fabrication and selection notes

Confirm the exact product standard, edition, dimensions, delivery condition, mechanical properties, impact requirements, heat treatment, welding procedure, corrosion environment and certification. A grade name alone is not sufficient for procurement or design approval.

QA/QC documentation

For critical service, verify heat number traceability, mill test certificate, chemical analysis, tensile/impact results where required, NDT, heat-treatment record and project-specific third-party inspection requirements.

Element Folio engineering reference. Requirements vary by standard edition, product form and manufacturer; verify the latest governing specification.