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15F GBT10
#8

Description

China GBT 8 China structural steel and alloy steel and 8 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 8
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 8 GBT China China structural steel and alloy steel
Q345GJ-E
Q235GJZ-C
Q235GJZ-D
Q235GJZ-E
Q345GJZ-C
Q345GJZ-D
Q345GJZ-E
08F
10F
15F

Chemical composition(mass fraction)(wt.%) of the 8

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.05-0.11 0.17-0.37 0.35-0.65 0.035 0.035 0.1 0.3 0.25

Mechanical Properties of steel grade 8

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
858 (≥) 797 (≥) 42 44 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade 8

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
41 - -     0.42 -  
934 485 - 42.3 414   -  
719 - 44 42.2   334 124

Heat Treatment of steel grade 8

Heat treated : 1847°C - 1183°C

Technological Curves of steel grade 8

Cross Reference Table (Equivalent Grade) of 8

Grade Standard Country Application
ASTM 1008 ASTM USA General use carbon steel bar
UNS G10080 UNS USA General use carbon steel bar
ASTM 1018 ASTM USA General use carbon steel bar
UNS G10180 UNS USA General use carbon steel bar
T8 China Carbon tool steel
T8Mn China Carbon tool steel
8MnSi China Alloy tool steel - Measuring tool steel cutting tools
3Cr2W8V China Alloy tool steel - hot-work die steel
5Cr4Mo3SiMnVA1 China Alloy tool steel - hot-work die steel
8Cr3 China Alloy tool steel - hot-work die steel
SM50 China Plastic mould with flat steel
SM48 China Plastic mould with Hot-rolled steel plate
W18Cr4V China High-speed tool steel
W18Cr4VCo8 China High-speed tool steel
W18Cr4V2Co8 China High-speed tool steel
W2Mo9Cr4VCo8 China High-speed tool steel
YG8A China Hard alloy tungsten cobalt class
H10 ASTM USA Alloy tool steel
T20811 UNS USA Alloy tool steel
T20810 UNS USA Alloy tool steel
15F GBT10
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