Available 24/7 at contact@steel-grades.com

Germany DIN 51Si7 Hot rolled steels for springs suitable for quenching and tempering - Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 51Si7 / 51 Si 7
Category Grade Standard Region/Area Standard Content
Metals 51 Si 7 DIN 17221 Germany Hot rolled steels for springs suitable for quenching and tempering - Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 51 Si 7

Element Min Max Similar
Si 1.5000 1.8000 -
S - 0.0450 -
P - 0.0450 -
N - 0.0070 -
Mn 0.5000 0.8000 -
C 0.4700 0.5500 -

Mechanical Properties of steel grade 51 Si 7

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)
756 (≥) 342 (≥) 42 33 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade 51 Si 7

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 - -     0.12 -  
513 381 - 44.3 124   -  
659 - 43 32.2   311 131

Heat Treatment of steel grade 51 Si 7

Heat treated : 1451°C - 1945°C

Technological Curves of steel grade 51 Si 7

Cross Reference Table (Equivalent Grade) of 51 Si 7

Available Suppliers

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

Rfq.: sales@longhaisteel.com
  • Do you supply this 51 Si 7?
  • List your company on S&G now? Join
  • Non-paying users only
Sidebar RFQs Menu My Account
Top