ASTM A403/A403M
Wrought Austenitic Stainless Steel Pipe Fittings
ASTM A403/A403M covers wrought austenitic stainless fittings for pressure-piping applications, including material grades, manufacture, heat treatment and testing.
What the standard covers
- Wrought fitting material grades
- Seamless and welded manufacturing routes
- Heat treatment and mechanical requirements
- Testing, marking and certification
What to state on your order
- WP grade and class
- Fitting type and dimensional standard
- Nominal size and schedule
- Seamless or welded construction where relevant
- NDE, supplementary tests and certificate type
Source basis
- Primary source: ASTM A403/A403M scope and ordering framework. Fitting dimensions are specified separately through standards such as ASME B16.9 or MSS SP-43, using licensed contract editions.
Edition applicability
- This guide does not fix an edition. The order must identify the ASTM material revision, fitting dimensional standard and applicable piping-code requirements.
Technical content updated: 2026-07-29
Organizational author: Tsingshan (Shandong) Iron & Steel Co., Ltd..Review method, status and limitations.
Related products and technical data
Applicable product forms
Common grade datasheets
RFQ
Request a Quotation
Send the specification you have; we will identify missing inputs before quoting.