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Grade T9
China ISC T10900
Corresponding Standard GB /T 1299-2025
Tool and Mould Steels
Classification Tool Steel
T9 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu More
Minimum Value 0.85 0.17 0.1 - - - - Cu+Ni≤0.55
Maximum Value 0.94 0.37 0.4 0.03 0.025 0.3 0.25
T9 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ≤192
Specimen Quenching at 760-780°C, water cooling HRC
≥62
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 Carbon Tool Steel
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM UNS Numerical Grade EN
T9 T00090 SK90 W1-8 1/2 T72301 C90U C90U
2 Approximate Comparison Table Processing Pure Copper, Silver Copper
China Japan United States International Organization for Standardization Germany France European Standard Russia
GB ISC JIS ASTM UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
T1 T10900 C1020
Cu99.96 		99.95Cu C10200 Cu-HPC C10200 Cu-HPC C10200 Cu-HPC
C10200 		Cu-HPC CW021 М0б
3 Approximate Comparison Table Carbon Tool Steel
China Japan United States International Organization for Standardization France Russia United Kingdom
GB JIS ASTM ISO NF EN/NF GOST BS EN/BS
T9 SK5 W1-81/2 TC90 Y1 90 У9 BW1A
4 Approximate Comparison Table Carbon Tool Steel 1
China Japan United States International Organization for Standardization France Russia United Kingdom
GB ISC JIS ASTM UNS ISO NF EN/NF GOST BS EN/BS
T9 T00090 SK90 W1A-8 1/2 T72301 C90U C90U
C90E2U 		У9-1 C90U
BW1A
5 Approximate Comparison Table Carbon Tool Steel 2
China Japan United States International Organization for Standardization European Standard Russia
GB ISC JIS ASTM ISO EN Numerical Grade GOST
T9 T00090 SK85
(SK5) 		W1A-8 1/2 Grade A C90U
(TC90) 		C90U 1.1830 У9
T9 Corresponding Standards(Same grade name, different standards)
1 GB /T 1298-2008
T9 T00090
2 GB /T 1299-2014
T9 T00090
3 GB 3525-1983
T9
4 YB /T 5058-2005
T9
5 HB /Z 136-2000
T9
6 GB /T 1299-2025
T9 T10900

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