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Grade 4Cr13
China ISC T20830
Corresponding Standard GB /T 1299-2025
Tool and Mould Steels
Classification Tool Steel
Properties Corrosion Resistance
4Cr13 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu
Minimum Value 0.36 - - - - 12 - -
Maximum Value 0.45 0.6 0.8 0.025 0.02 14 0.6 0.25
• Smelting method: Vacuum degassing
4Cr13 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
condition of delivery Annealing ≤235
condition of delivery Pre-hardening HRC: 30~36
Specimen Quenching at 1050-1100°C, oil cooling HRC: ≥50
New and Old Grade Replacement List
Corresponding Standard Grade
GB /T 1299-2014
Grade
China ISC
GB /T 1299-2025
Grade
China ISC
1 Approximate Comparison Table Plastic Mold Steel
China Japan International Organization for Standardization Germany Sweden
GB ISC JIS ISO DIN EN/DIN W-Nr. SS
4Cr13 S42043 SUS 420J2 X39Cr13 X40Cr13 1.2083 2304
2 Approximate Comparison Table Martensitic Stainless Steel
China United States Germany France European Standard Russia United Kingdom
GB ASTM DIN EN/DIN NF EN/NF EN Numerical Grade GOST BS EN/BS
4Cr13 Type420 X39Cr13 Z40C13 X39Cr13 1.4031 40KH13 X39Cr13
3 Approximate Comparison Table Martensitic Stainless Steel
China Japan International Organization for Standardization Germany France Russia
GB JIS ISO DIN EN/DIN NF EN/NF GOST
4Cr13 SUS420J2 5
(ISO 683-13-1986) 		X40Cr13 Z40C13 40X13
4 Approximate Comparison Table Plastic Mold Steel
China International Organization for Standardization
GB ISC ISO
4Cr13 T20830 X40Cr14
4Cr13 Corresponding Standards(Same grade name, different standards)
1 GB /T 20878-2007
(4Cr13) 40Cr13 S42040
2 GB /T 1220-2007
(4Cr13) 40Cr13 S42040
3 GB /T 4240-2019
(4Cr13) 40Cr13 S42040
4 GB /T 4356-2016
(4Cr13) 40Cr13 S42040
5 GB /T 3280-2015
(4Cr13) 40Cr13 S42040
6 GJB 2294-1995
4Cr13
7 GB /T 4237-2015
(4Cr13) 40Cr13 S42040
8 GB /T 1299-2014
4Cr13 S42043
9 YB /T 129-2017
4Cr13
10 GJB 2294A-2014
(4Cr13) 40Cr13
11 GB /T 35840.3-2018
4Cr13 S42043
12 GB /T 20878-2024
(4Cr13) 40Cr13 S42040
13 GB /T 1299-2025
4Cr13 T20830

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