German buyers sourcing in Asia face a recurring challenge: Asian suppliers use JIS designations (SUS304, SUS316) while German drawings carry DIN material numbers (1.4301, 1.4404). Mismapping causes misunderstandings.
Cross-reference table
- SUS304 ↔ 1.4301 (X5CrNi18-10)
- SUS304L ↔ 1.4307
- SUS316 ↔ 1.4401
- SUS316L ↔ 1.4404
- SUS316Ti ↔ 1.4571
- SUS321 ↔ 1.4541
- SUS440C ↔ 1.4125
- SUS630 / 17-4PH ↔ 1.4542
- Duplex S31803 ↔ 1.4462
- Super Duplex S32750 ↔ 1.4410
PED 2014/68/EU material certificates
For pressure equipment under PED, EN 10204 certificates are required:
- 3.1 — mill cert verified by independent inspector. Standard for most pressure applications.
- 3.2 — additional acceptance by Notified Body. Required for higher PED categories.
What to specify in your inquiry
Material in both designations (DIN + JIS), EN 10204 cert level, corrosion environment, weld vs. machined, heat treatment state.
What to expect from the supplier
EN 10204 mill cert with unambiguous material designation, batch traceability to the steel mill, FAI report at production start, and documented material analysis for safety-critical parts.
