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Grade 3Cr2Mo
China ISC T23020
Corresponding Standard GB /T 1299-2025
Tool and Mould Steels
Classification Tool Steel
3Cr2Mo Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo More
Minimum Value 0.28 0.2 0.6 - - 1.4 - 0.3 Cu+Ni≤0.55
Maximum Value 0.4 0.8 1 0.025 0.02 2 0.25 0.55
• Smelting method: Vacuum degassing
3Cr2Mo Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
condition of delivery Annealing ≤235
condition of delivery Pre-hardening HRC: 28~36
Specimen Quenching at 850-880°C, oil cooling HRC: ≥52
New and Old Grade Replacement List
Corresponding Standard Grade
GB /T 1299-2014
Grade
China ISC
Other Name
GB /T 1299-2025
Grade
China ISC
1 Approximate Comparison Table Plastic Mold Steel
China United States International Organization for Standardization Germany
YB GB ISC ASTM/AISI ISO DIN EN/DIN W-Nr.
SM3Cr2Mo 3Cr2Mo T25303 P20 35CrMo2 40CrMnMo 7 1.2311
2 Approximate Comparison Table Alloy Tool Steel 2
China United States International Organization for Standardization European Standard
GB ISC ASTM ISO Numerical Grade
3Cr2Mo T23020 P20 35CrMo7 1. 2302
3Cr2Mo Corresponding Standards(Same grade name, different standards)
1 GB /T 1299-2014
3Cr2Mo T25303 T22020
2 YB /T 129-2017
3Cr2Mo
3 YB /T 095-2015
3Cr2Mo
4 GB /T 35840.4-2020
3Cr2Mo
5 GB /T 1299-2025
3Cr2Mo T23020

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