On this page 6 sections
What ASTM A403 covers
Standard at a glance
- Standard
- ASTM A403 / ASME SA403
- Issued by
- ASTM
- Product form
- Fittings
- Grades on site
- 10
Wrought stainless butt-weld fittings (elbows, tees, reducers, caps) designated WP (e.g. WP316L), in classes S (seamless), W (welded, radiographed) and WX (welded with full radiography of all welds).
Key requirements
- Made from pipe, plate or forgings
- Solution annealed
- Dimensions per ASME B16.9 / MSS SP-43
- Radiography of welds for WX class
Summary for procurement guidance. Refer to the current edition of the standard for full requirements.
Grades supplied to ASTM A403
Ordering to ASTM A403
- State "ASTM A403" and the edition if your project requires it
- Grade / designation and product dimensions
- Supplementary requirements (tests, heat treatment, certification)
- Certificate type: EN 10204 3.1 or 3.2
Frequently asked questions
What does ASTM A403 cover?
Wrought stainless butt-weld fittings (elbows, tees, reducers, caps) designated WP (e.g. WP316L), in classes S (seamless), W (welded, radiographed) and WX (welded with full radiography of all welds).
Which grades are covered by ASTM A403?
On this site: SS 304, SS 304L, SS 316, SS 316L, SS 317L, SS 321, SS 347, SS 310S, SS 904L, SS 254 SMO.
Do you supply material certified to ASTM A403?
Yes. Material is supplied to ASTM A403 with EN 10204 3.1 certificates (3.2 on request), where the mill certifies to it.
Is ASME SAA403 the same as ASTM A403?
ASME adopts many ASTM material specifications into Section II with an "S" prefix (for example SA-403). The adopted text is identical or includes stated modifications, and dual-certified material meets both.