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Q420R

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China GB Q420R 锅炉和压力容器用钢板 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q420R / Q420R
Category Grade Standard Region/Area Standard Content
Metals Q420R GB 713 China 锅炉和压力容器用钢板

Chemical composition(mass fraction)(wt.%) of the Q420R

Element Min Max Similar
S - 0.0100 -
P - 0.0200 -
Ti - 0.0300 -
V - 0.1000 -
Nb 0.0150 0.0500 -
Mo - 0.0800 -
Cr - 0.3000 -
Ni 0.2000 0.5000 -
Cu - 0.3000 -
Mn 1.3000 1.7000 -
Si - 0.5500 -
C - 0.2000 -

Mechanical Properties of steel grade Q420R

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)
236 (≥) 988 (≥) 12 13 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade Q420R

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
31 - -     0.14 -  
998 662 - 22.3 334   -  
984 - 11 33.2   212 312

Heat Treatment of steel grade Q420R

Heat treated : 1221°C - 1834°C

Technological Curves of steel grade Q420R

Cross Reference Table (Equivalent Grade) of Q420R

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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Jiangyou Longhai Special Steel Co.,Ltd.

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