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Description

UK B.S. BS 970-4, 443S65 Specialsteel Specification for wrought steels for mechanical and allied engineering purposes. Valve steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 443S65
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 443S65 B.S. UK Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Chemical composition(mass fraction)(wt.%) of the 443S65

C Si Mn P S Cr Ni Mo
0.75 -0.85 1.75 -2.25 0.30 -0.75 ≤0.040 ≤0.030 19.00 -21.00 1.20 -1.70 ≤ ≥

Mechanical Properties of steel grade 443S65

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)
595 (≥) 246 (≥) 44 33 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade 443S65

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 - -     0.13 -  
216 131 - 33.3 111   -  
778 - 13 32.2   433 313

Heat Treatment of steel grade 443S65

Heat treated : 1973°C - 1776°C

Technological Curves of steel grade 443S65

Relevant standard of 443S65

BS 970-4 Specification for wrought steels for mechanical and allied engineering purposes. Valve steels BS-970-4.pdf

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