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U4 U5
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Description

Australia AS 4 Australia Structural steel and 4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 4
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 4 AS Australia Australia Structural steel
X1315
X1320
X1325
1340
X1340
X1345
U1
U3
3
U4

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

C(％) Si(％) Mn(％) P(％) S(％)
0.25-0.38 0.10-0.40 0.40-1.00 0.04 0.04

Mechanical Properties of steel grade 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)
331 (≥) 796 (≥) 43 12 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade 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
14 - -     0.24 -  
485 823 - 12.3 422   -  
895 - 33 41.2   312 132

Heat Treatment of steel grade 4

Heat treated : 1279°C - 1825°C

Technological Curves of steel grade 4

Cross Reference Table (Equivalent Grade) of 4

Grade Standard Country Application
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
W18Cr4V China High-speed tool steel
W18Cr4VCo8 China High-speed tool steel
U4 U5
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