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255

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S32550 S32750
#255

Description

255 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: 255
Category Type Steel Grade Standard Country Application
Steel GradesHigh Alloy 255
S32001
S32003
S32101
S32205
2205
S32304
2304
S32506
S32520
S32550

Chemical composition(mass fraction)(wt.%) of the 255

 

C
≤		 Si
≤		 Mn
≤		 P
≤		 S
≤		 Cr Ni
0.04 1 1.5 0.04 0.03 24-27 4.5-6.5
Mo Al Cu Nb Ti V Ce
2.9-3.9   1.5-2.5        
N Co Pb B Other    
0.1-0.25            
             

Mechanical Properties of steel grade 255

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)
129 (≥) 651 (≥) 44 42 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade 255

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
42 - -     0.21 -  
216 611 - 42.3 242   -  
473 - 22 44.2   322 333

Heat Treatment of steel grade 255

Heat treated : 1587°C - 1195°C

Technological Curves of steel grade 255

Cross Reference Table (Equivalent Grade) of 255

Grade Standard Country Application
Q255 A China Engineering and welding
Q255 B China Engineering and welding
1.2550 DIN Germany Cold working alloy tool steel
1.2552 DIN Germany Cold working alloy tool steel
1.3255 DIN Germany High-speed tool steel
SS14:2550 SS Sweden Carbide for cutting tools
S32550 UNS USA Dual-phase steel
S32550 UNS USA Dual-phase steel
erralium255 UNS USA Dual-phase steel
erralium255 UNS USA Dual-phase steel
419255 The Czech republic tool steel
417255 The Czech republic Stainless steel
17 255 The Czech republic Stainless steel
9255 Australia Structural steel
Q255 China China structural steel and alloy steel
Q255 China China structural steel and alloy steel
EN P255 EN Euronorm Structural steel
S32550 S32750
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