24 July 2021 Free-Cutting Steel Bar
46S20 Free Cutting Steel Bar
46S20 is the British standard free cutting steel grades, corresponding to the Chinese standard Y45 or Y45Mn, 46S20 not only good cutting performance, and heat treatment after a good mechanical property, adapted to create more important machine structural parts, such as machine gear shaft, spline shaft, Tractor drive shaft and so on.
Chemical Composition:
| C(％) | Si(％) | Mn(％) | P(％) | S(％) |
|---|---|---|---|---|
| 0.42-0.50 | 0.40 | 0.70-1.10 | 0.06 | 0.15-0- 25 |
MECHANICAL PROPERTIES:
| Proof strength Rp0.2(MPa) | Tensile strength Rm(MPa) | Impact energy KV(J) | Elongation at fracture A(%) | Reduction in cross section on fracture Z(%) | As-Heat-Treated Condition | Brinell hardness(HBW) |
|---|---|---|---|---|---|---|
| 437(≥) | 584(≥) | 42 | 12 | 31 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 142 |
PHYSICAL PROPERTIES:
| Property | Density kg/dm3 | Temperature T °C/F | Specific heat J/kgK | Thermal conductivity W/mK | Electric resistance µΩ·cm | Modulus of elasticity kN/mm2 | Expansion rate |
|---|---|---|---|---|---|---|---|
| 172(≥) | 621(≥) | 31 | 31 | 44 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 241 | |
| Temp. °C/°F | Creep strain limit (10000h) (Rp1,0)N/mm2 | Creep rupture strength (10000h) (Rp1,0)N/mm2 | |||||
| 434 | 722 | 911 |