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20R

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S480 16MnR
#20R

Description

China GBT 20R China structural steel and alloy steel and 20R Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 20R
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 20R GBT China China structural steel and alloy steel
U34902
S205
S240
S290
S315
S360
S385
S415
S450
S480

Chemical composition(mass fraction)(wt.%) of the 20R

C(％) Si(％) Mn(％) P(％) S(％)
Max 0.20 0.15-0.30 0.40-0.90 0.035 0.03

Mechanical Properties of steel grade 20R

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)
883 (≥) 318 (≥) 43 12 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade 20R

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
11 - -     0.14 -  
762 356 - 21.3 323   -  
492 - 14 12.2   314 131

Heat Treatment of steel grade 20R

Heat treated : 1423°C - 1355°C

Technological Curves of steel grade 20R

Cross Reference Table (Equivalent Grade) of 20R

Grade Standard Country Application
1020rW6 UNE Spain Spain structural alloy steel
320rMnCoV12 UNE Spain Spain structural alloy steel
320rMoCoV12 UNE Spain Spain structural alloy steel
20R GBT China China structural steel and alloy steel
S480 16MnR
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Jiangyou Longhai Special Steel Co.,Ltd.

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