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Q345FRB

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China YB Q345FRB 耐火热轧 H型钢(Hot rolled fire-resistant H section steel) and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q345FRB / Q345FRB
Category Grade Standard Region/Area Standard Content
Metals Q345FRB YB/T 4261 China 耐火热轧 H型钢(Hot rolled fire-resistant H section steel)

Chemical composition(mass fraction)(wt.%) of the Q345FRB

Element Min Max Similar
V - 0.1500 -
Mo - 0.9000 -
Cr - 0.7500 -
Nb - 0.2000 -
S - 0.0350 -
P - 0.0350 -
Mn - 1.7000 -
Si - 0.6000 -
C - 0.2000 -

Mechanical Properties of steel grade Q345FRB

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)
837 (≥) 883 (≥) 42 21 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 412

Physical Properties of steel grade Q345FRB

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 - -     0.43 -  
399 124 - 41.3 423   -  
295 - 23 31.2   111 431

Heat Treatment of steel grade Q345FRB

Heat treated : 1285°C - 1144°C

Technological Curves of steel grade Q345FRB

Cross Reference Table (Equivalent Grade) of Q345FRB

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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