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cross reference · GB/T 20878 · UNS · JIS · 304 · 316L
Stainless grade cross-reference: GB/T 20878, EN 10088, ASTM/UNS and JIS
The same material is written differently across standards. 304 is 06Cr19Ni10 in GB, 1.4301 in EN, S30400/304 in UNS/ASTM and SUS304 in JIS; chemistry and properties govern acceptance.
Stainless grades are designated differently in GB/T 20878, EN 10088, ASTM/UNS and JIS. Common equivalents:
1) The table is for communication, not automatic substitution; C, Ni and Mo ranges and permitted deviations differ between systems.
2) Some "close" grades (e.g. 1.4306 vs 304L) have different minimum chemistry — important for deep drawing or welded parts.
3) Quotes and mill certificates should state both system and grade designation, e.g. "316L, UNS S31603, per ASTM A240".
A cross-reference answers "is it the same steel"; conformance still depends on the contract standard and measured values.
Compiled by SteelWe editors and industry experts. For industry exchange only; not trading or investment advice. Cite the source when quoting.
