Physical properties(average values)at ambient temperature:
Modulus of elasticity[103 x N/mm2]:217 Density [g/cm3]:8.23
Thermal conductivity[W/m.K]:19.0
Electric resistivity[Ohm mm2/m]:0.80
Specific heat capacity[J/g.K]:0.46
Equivalent grades of steel HS10-4-3-10 (1.3207)
| EU EN |
Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Italy UNI |
Sweden SS |
Poland PN |
Czechia CSN |
Austria ONORM |
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Chemical composition % of steel HS10-4-3-10 (1.3207): EN 4957-2000
| C | Si | Mn | P | S | Cr | Mo | W | V | Co |
| 1.2 – 1.35 | max 0.45 | max 0.4 | max 0.03 | max 0.03 | 3.8 – 4.5 | 3.2 – 3.9 | 9 – 10 | 3 – 3.5 | 9.5 – 10.5 |
MECHANICAL PROPERTIES
| 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) |
| 171 (≥) | 692 (≥) | 43 | 43 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 243 |
Heat Treatment Process Requirement:
The below technical details strictly follow DIN 1.3207 standard to get right ratio among different crystal organization,to let this material performance can be as good as required.Below is the details:
Soft Annealing:
Heat to 800-860C,cool slowly in furnace.This will produce a maximum Brinell hardness of 300.
Stress Relieving:
Stress relieving to remove machining stresses should be carried out by heating to 600-650″C,holding for one hour at heat,followed by air cooling.This operation is performed to reduce distortion during heat treatment.
Hardening:
Harden from a temperature of 1200-1230″C followed by oil,air quenching or warm bath at 540″C.Hardness after quenching is 64-66 HRC.
Tempering:
Tempering temperature:540-570″C,at least 2x for 65-67 HRC.Hardness after tempering is 64-67 HRC.
