Detailed product specifications
Specification details
| Parameter / condition | Value / requirement |
|---|---|
| Product standard | ASTM A240/A240M |
| Product form | Steel plate |
| UNS designation | S30403 |
| Carbon (C) | 0.030% max. |
The stated values use the rule edition shown above. Select the contract standard, thickness, delivery condition and test specimen together; the supplied plate certificate records the actual heat results.
Material selection
Selection of low-carbon austenitic stainless plate involves evaluating several technical factors during the planning of welded equipment. The low carbon limit of UNS S30403 helps reduce sensitization risk in welded fabrication. Typical selection considerations for welded equipment include service chemistry, surface finish, fabrication methods, and cleaning procedures. Designers must note that the material choice is strictly conditional on operating temperature and chloride exposure levels. When ordering, buyers must ask for plate rather than sheet if the engineering drawing requires plate. Buyers should also list the required finish, exact thickness, and necessary documentation separately to avoid discrepancies during the material review process.
What to include in an enquiry
To review an active quotation or verify ordered material against your procurement records, collect all relevant documentation prior to contacting our support desk. Ensure you have the exact purchase order number, line item references, and specified dimensions ready for comparison. When discussing material specifications, confirm whether the order calls for single-certified UNS S30403 or dual-certified material, and ensure that the requested thickness and surface finish match the engineering drawings. Providing the complete heat number from the material test report helps expedite the verification of the supplied steel against the applicable standards.
Frequently asked questions
How can I confirm a dual-certified 304/304L heat from its mill test certificate?
To confirm a dual-certified heat from the mill test certificate, review the chemical analysis section to ensure the carbon content meets the lower 0.030 percent maximum limit required for 304L. Next, verify that the reported tensile and yield strengths satisfy the minimum mechanical property thresholds for both the standard 304 and the low-carbon 304L designations. Finally, check that the document explicitly lists both UNS numbers or grade descriptions in the specification compliance table to validate dual certification.
Technical sources and specification notes
- BEBON 304L stainless plate overview — Grade and low-carbon designation
Use the purchase specification and the inspection document for the actual plate. - ASTM A240/A240M-26 — Scope
Use the purchase specification and the inspection document for the actual plate. - Outokumpu Americas product offering — Core 304L/4307 product chemistry reference
Use the purchase specification and the inspection document for the actual plate. - 中外钢铁牌号速查手册（第4版） — PDF p. 376 · S30403 designation and historical chemistry comparison
Use the purchase specification and the inspection document for the actual plate.