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OL7.4

Favorite Datasheet
OL37.3 OL42.1
#OL7 #4

Description

Romania STAS/SR OL7.4 Structural steel and OL7.4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: OL7.4
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel OL7.4 STAS/SR Romania Structural steel
ASTM A335 GRADE P5
ASTM A335 GRADE P9
ASTM A335 GRADE P91
ASTM A335 GRADE P92
OL30
OL32.1
OL34.1
OL37.1
OL37.2
OL37.3

Chemical composition(mass fraction)(wt.%) of the OL7.4

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%) Al(%)
0.17 0.40 0.80 0.040 0.040 0.3 0.3 0.3 0.02

Mechanical Properties of steel grade OL7.4

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)
737 (≥) 547 (≥) 13 41 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade OL7.4

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 - -     0.43 -  
343 127 - 42.3 233   -  
797 - 42 22.2   431 424

Heat Treatment of steel grade OL7.4

Heat treated : 1885°C - 1535°C

Technological Curves of steel grade OL7.4

Cross Reference Table (Equivalent Grade) of OL7.4

Grade Standard Country Application
OL7.4 STAS/SR Romania Structural steel
OL70.1 STAS/SR Romania Structural steel
Q345q E China Bridge structure with steel
Q345q C China Bridge structure with steel
4CrW2Si China Alloy tool steel - Impact resistance tool steel
Cr4W2MoV China Alloy tool steel - cold work steels
6W6Mo5Cr4V China Alloy tool steel - Impact resistance tool steel
5Cr4W5Mo2V China Alloy tool steel - hot-work die steel
4CrMnSiMoV China Alloy tool steel - hot-work die steel
4Cr3Mo3SiV China Alloy tool steel - hot-work die steel
4Cr5MoSiV China Alloy tool steel - hot-work die steel
4Cr5MoSiV1 China Alloy tool steel - hot-work die steel
4Cr5W2VSi China Alloy tool steel - hot-work die steel
SM45 China Plastic mould with flat steel
SM50 China Plastic mould with flat steel
SM4Cr5MoSiV China Plastic mould with flat steel
SM4Cr5MoSiV1 China Plastic mould with flat steel
SM4Cr13 China Plastic mould with flat steel
SM45A China Plastic mould with Hot-rolled steel plate
SM48 China Plastic mould with Hot-rolled steel plate
OL37.3 OL42.1
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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