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Grade T8
Corresponding Standard GB 3525-1983
Cold-Rolled Spring and Steel Strips
Classification Carbon Steel
T8 Mechanical Properties
thickness
t
mm		 Tensile Strength
σb
Mpa 		Elongation or Extension Rate
δ
%
t ≤ 1.5, annealed steel strip ≤635 ≥20
t > 1.5, annealed steel strip ≤735 ≥15
Cold-Hard Steel Strip 735~1175
1 Approximate Comparison Table Carbon Tool Steel
China Japan International Organization for Standardization European Standard
GB ISC JIS Numerical Grade EN
T8 T00080 SK80 C80U C80U
2 Approximate Comparison Table Non-Alloy Cold-Work Tool Steels
China Japan Germany France European Standard Russia United Kingdom
GB JIS DIN EN/DIN NF EN/NF EN Numerical Grade GOST BS EN/BS
T8 SK5
SK6 		C80W1
C80W2 		Y180 C80U 1.1525 U8 BW1A
3 Approximate Comparison Table Carbon Tool Steel
China Japan United States International Organization for Standardization Germany France Russia
GB ISC JIS ASTM ISO DIN EN/DIN W-Nr. NF EN/NF GOST
T8 T00080 SK6 W1-0.8C TC80 C80W1 1.1525 Y1 80 У8
4 Approximate Comparison Table Carbon Tool Steel
China Japan South Korea United States International Organization for Standardization Germany
GB JIS KS ASTM ISO DIN EN/DIN
T8 SK5
SK6 		STC5
STC6 		W1A-8 TC80 C80W2
5 Approximate Comparison Table Carbon Tool Steel 1
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS Commercial Grade ISO DIN EN/DIN W-Nr. NF EN/NF GOST SS BS EN/BS
T8 T00080 SK 6 SK 80 STC 6 W1A-8 C80U C80W2 1.1625 C80U
C80E2U 		У8-1 1778 C80U
T8 Corresponding Standards(Same grade name, different standards)
1 GB /T 1298-2008
T8 T00080
2 GB /T 1299-2014
T8 T00080
3 ASTM A600-1992(R2010)
T8 A600 T8 T12008
4 GB 3525-1983
T8
5 YB /T 5058-2005
T8
6 HB /Z 136-2000
T8

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