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Home Material GB /T 1299-2025
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Grade T8Mn
China ISC T11800
Corresponding Standard GB /T 1299-2025
Tool and Mould Steels
Classification Tool Steel
T8Mn Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu More
Minimum Value 0.8 0.17 0.4 - - - - Cu+Ni≤0.55
Maximum Value 0.9 0.37 0.6 0.03 0.025 0.3 0.25
T8Mn Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ≤187
Specimen Quenching at 780-800°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
GB ISC JIS ASTM UNS
T8Mn T01080 SK85 W1-8 T72301
2 Approximate Comparison Table Carbon Tool Steel
China Japan United States Germany Russia
GB JIS ASTM DIN EN/DIN W-Nr. GOST
T8Mn SK5 W1-8 C85WS 1.1830 У8Г
3 Approximate Comparison Table Carbon Tool Steel 1
China Taiwan, China Japan South Korea United States Germany Russia
GB ISC CNS JIS KS Commercial Grade DIN EN/DIN W-Nr. GOST
T8Mn T01080 SK 5 SK 85 STC 5 W1C-8 C85WS 1.1830 У8Г-1
4 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
T8Mn T01080 SK85
SK85 		W1-C8 C90U
(TC90) 		C90U 1.1830 У8Г
T8Mn Corresponding Standards(Same grade name, different standards)
1 GB /T 1298-2008
T8Mn T01080
2 GB /T 1299-2014
T8Mn T01080
3 GB 3525-1983
T8Mn
4 YB /T 5058-2005
T8Mn
5 GB /T 1299-2025
T8Mn T11800

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