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45 55
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Description

China GBT 50 China structural steel and alloy steel and 50 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 50
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 50 GBT China China structural steel and alloy steel
15F
8
GBT10
15
20
25
30
35
40
45

Chemical composition(mass fraction)(wt.%) of the 50

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.47-0.55 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.3 0.25

Mechanical Properties of steel grade 50

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)
618 (≥) 753 (≥) 24 23 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical Properties of steel grade 50

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
21 - -     0.42 -  
657 851 - 33.3 144   -  
715 - 23 21.2   113 134

Heat Treatment of steel grade 50

Heat treated : 1676°C - 1349°C

Technological Curves of steel grade 50

Cross Reference Table (Equivalent Grade) of 50

Grade Standard Country Application
UNS G10050 UNS USA General use carbon steel bar
UNS G10150 UNS USA General use carbon steel bar
T31501 UNS USA Alloy tool steel
T31506 UNS USA Alloy tool steel
T31507 UNS USA Alloy tool steel
M50 ASTM USA The middle of high-speed tool steel
T11350 UNS USA The middle of high-speed tool steel
HAP 50 AISI USA Powder metallurgy high-speed tool steel
C-50 AISI USA Machining with carbide
Stellite 250 Stellite alloy
Stellite 506 USA Stellite alloy
1.1750 DIN Germany Carbon tool steel
1.2550 DIN Germany Cold working alloy tool steel
X50CrMoW9-1-1 DIN Germany Cold working alloy tool steel
50NiCr13 DIN Germany Cold working alloy tool steel
X50CrMoV5-1 DIN Germany Hot working alloy tool steel
50CrMoV13-14 DIN Germany Hot working alloy tool steel
X50NiCrWV13-13 DIN Germany Hot working alloy tool steel
SKH50 JIS Japan W-phase system high-speed tool steel
X50P UK Carbide for cutting tools
45 55
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Jiangyou Longhai Special Steel Co.,Ltd.

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