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70 80
#75

Description

China GBT 75 China structural steel and alloy steel and 75 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 75
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 75 GBT China China structural steel and alloy steel
25
30
35
40
45
50
55
60
65
70

Chemical composition(mass fraction)(wt.%) of the 75

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.72-0.80 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.3 0.25

Mechanical Properties of steel grade 75

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)
936 (≥) 489 (≥) 43 22 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade 75

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
34 - -     0.23 -  
821 736 - 43.3 214   -  
119 - 41 11.2   234 244

Heat Treatment of steel grade 75

Heat treated : 1219°C - 1392°C

Technological Curves of steel grade 75

Cross Reference Table (Equivalent Grade) of 75

Grade Standard Country Application
Q275 China Engineering and welding
C75W DIN Germany Carbon tool steel
1.1750 DIN Germany Carbon tool steel
75Cr1 DIN Germany Cold working alloy tool steel
75CrMoNiW6-7 DIN Germany Cold working alloy tool steel
SK75 JIS Japan Carbon tool steel
SS14:2750① SS Sweden Carbide for cutting tools
SS14:2750① SS Sweden Carbide for cutting tools
SS14:2752 SS Sweden Carbide for cutting tools
SS14:2752 SS Sweden Carbide for cutting tools
S14:2754① SS Sweden Carbide for cutting tools
S14:2754① SS Sweden Carbide for cutting tools
SS14:2756① SS Sweden Carbide for cutting tools
SS14:2756① SS Sweden Carbide for cutting tools
CT75 SS Sweden Carbide for cutting tools
CT75 SS Sweden Carbide for cutting tools
Type440FSe UNS USA Martensitic special steel
Type440FSe UNS USA Martensitic special steel
UNS N07500 UNS USA precipitation hardening
UNS N07750 UNS USA precipitation hardening
70 80
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Jiangyou Longhai Special Steel Co.,Ltd.

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