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Description

Romania STAS/SR Rp4 tool steel and Rp4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: Rp4
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy Rp4 STAS/SR Romania tool steel
39VSiMoCr52
40VSiMoCr52
55MoCrNi16
55VMoCrNi16
55VMoCrNil7
57VMoCrNil7
30VCrW85
Rpl
Rp2
Rp3

Chemical composition(mass fraction)(wt.%) of the Rp4

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) V(%)
1. 17-1.27 Max 0.45 Max 0.40 0.03 0.030 3.80- 4.50 2,70- 3.20 4.70-5.20 6.00-6. 70

Mechanical Properties of steel grade Rp4

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)
587 (≥) 236 (≥) 41 44 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical Properties of steel grade Rp4

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
24 - -     0.22 -  
341 599 - 44.3 321   -  
758 - 24 21.2   231 422

Heat Treatment of steel grade Rp4

Heat treated : 1121°C - 1818°C

Technological Curves of steel grade Rp4

Cross Reference Table (Equivalent Grade) of Rp4

Grade Standard Country Application
Rp4 STAS/SR Romania tool steel

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