ASTM A403/A403M Wrought austenitic stainless steel fittings
CurrentLatest edition found. Still confirm amendments with the publisher.
- Edition
- A403/A403M-26b
- Publisher
- ASTM
- Part family
- Pipes, flanges & gaskets
- Reviewed
- 27 October 2026 · source checked
Is ASTM A403/A403M still current?
Yes. A403/A403M-26b is the latest edition MechAtlas found (MechAtlas review: 27 October 2026). Check the publisher for amendments before you specify it.
What it covers
Material spec for stainless pipe fittings, WP and CR grades.
Parts that use ASTM A403/A403M
- Butt-weld fitting (USA (ASME / ASTM), material)
Elbows, tees, reducers and caps welded end-to-end to pipe to change direction, branch or size.
ASTM A403 WP316L-S
Grades: WP grades (ASME dims) / CR grades (MSS dims)
Austenitic stainless fittings.
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ASTM A403/A403M or the ASTM store.
Open in MechAtlasCheck a drawing callout
Other pipes, flanges & gaskets standards
- DIN 2633 Replaced
Weld-neck flanges PN 16 (old DIN) - IS 13159-1 Withdrawn
Pipe flanges, dimensions - EN 10217-1 Changing
Welded pressure tubes, room temperature - EN 1092-1 Changing
Steel flanges, PN designated - API 5L Current
Line pipe - ASME B16.20 / B16.21 Current
Metallic / non-metallic gaskets - ASME B16.47 Current
Large flanges NPS 26–60, Series A and B (do not mate) - ASME B16.5 Current
Pipe flanges & flanged fittings - ASME B16.9 Current
Wrought butt-welding fittings - ASME B16.9 / B16.11 Current
Butt-weld / forged socket-weld & threaded fittings - ASME B36.10 Current
Welded & seamless wrought steel pipe - ASME B36.19 Current
Stainless steel pipe dimensions