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Grade 9SiCr
China ISC T21110
Corresponding Standard GB /T 1299-2025
Tool and Mould Steels
Classification Tool Steel
9SiCr Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu More
Minimum Value 0.85 1.2 0.3 - - 0.95 - Cu+Ni≤0.55
Maximum Value 0.95 1.6 0.6 0.03 0.025 1.25 0.25
9SiCr Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing 197~241①
Specimen Quenching at 820-860°C, oil cooling HRC: ≥62
New and Old Grade Replacement List
Corresponding Standard Grade
GB /T 1299-2014
Grade
China ISC
Old Grade
Other Name
GB /T 1299-2025
Grade
China ISC
1 Approximate Comparison Table Plastic Mold Steel
China United States Germany Sweden
GB ISC ASTM DIN EN/DIN W-Nr. SS
9SiCr T31219
(T30100) 		L3 90CrSi5 1.2108 2092
2 Approximate Comparison Table Alloy Tool Steel
China Germany Russia
GB DIN EN/DIN W-Nr. GOST
9SiCr 90CrSi5 1.2108 9ХС
9SiCr Corresponding Standards(Same grade name, different standards)
1 GB /T 1299-2014
9SiCr T31219 (9CrSi) T30100
2 YB /T 095-2015
9SiCr
3 GB /T 1299-2025
9SiCr T21110

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