JIS G4311 (Japan) and GB/T 1221 310S (China) cover heat-resistant stainless round bars with these similarities and differences:
Grade equivalence: JIS SUS310S ≈ GB/T 1221 06Cr25Ni20, with identical Cr (24–26%) and Ni (19–22%) ranges.
High-temperature properties: Both maintain 80% of room-temperature strength at 600°C, suitable for furnace components.
Oxidation resistance: SUS310S resists scaling up to 1100°C, matching 310S's performance in high-temperature air.
Applications: SUS310S is used in Japanese kilns and heat exchangers, while 310S dominates Chinese chemical furnace production, with both meeting global heat-resistant standards.