20MnCr5 Carburized steel
20MnCr5 steel (DIN 1.7147 material)
1. 20MnCr5 Characteristics
Steel grade 20MnCr5 is a structural alloy steel for surface hardening produced to the requirements of ISO 683-3/ EN 10084.
2. 20MnCr5 Classification: Structural alloy steel.
3. 20MnCr5 Products: Semi-finished products, rods, wide strip, plates and forgings.
4. 20MnCr5 Chemical composition
| C(％) | 0.17～0.22 | Si(％) | ≤0.40 | Mn(％) | 1.10～1.40 | P(％) | ≤0.035 |
| S(％) | ≤0.035 | Cr(％) | 1.00～1.30 |
5. 20MnCr5 Heat treatment Related
- Annealing of 20MnCr5|1.7147 Carburizing steel
Slowly heated to 790-810 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. Different annealing ways will get different hardness.The 20MnCr5|1.7147 Carburizing steel will get Hardness MAX 248 HB （Brinell hardness）.
- Quenching and temperature of 20MnCr5|1.7147 Carburizing steel
Heated slowly to 788°C, Then put in salt-bath furnace keep 1191 ℃ to 1204 ℃。quenching by oil get 60 to 66 HRc hardness. High temperature tempering: 650-700℃，cool in air, get hardness 22 to 30HRC. Low temperature tempering: 150-200 ℃， Cool in ari, get 61-66HRC hardness.
- Hot work and cold work of 20MnCr5|1.7147 Carburizing steel
DIN 16MnCr5|1.7131 steel can hot worked at 205 to 538°C, 16MnCr5|1.7131 gearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.
6. Mechanical Properties Of 20MnCr5|1.7147 gearing steel
The mechanical properties of annealed DIN 20MnCr5|1.7131 gearing steel (typical for steel) are outlined in the table below:
| Tensile | Yield | Bulk modulus | Shear modulus | Poisson’s ratio | Thermal conductivity | |
| MPa | Mpa | Gpa | Gpa | W/mK | ||
| 520 | 415 Min | 140 | 80 | 0.27-0.30 | 46.6 |
7.Applications of 20MnCr5|1.7147 Carburizing steel
DIN 20MnCr5|1.7147 gearing steel steel is widely used for a variety of applications in the used to the gearings in rotating machinery.
Typical applications such as: valve bodies, pumps and fittings, the high load of wheel, bolts, double-headed bolts, gears, internal combustion engine. Electric locomotives, machine tools, tractors, steel rolling equipment, boring machine, railway vehicle, and mining machinery transmission shaft on the steel ball, roller and shaft sleeve, etc.
