45HNMFA, 45HN2MFA alloy structural steel for the most high performance engine parts and engines according to PN-72/H-84030 and PN-89/H-84030/04.
| Standards | Steel Grades | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | Ni: | V: | Ti: | Cu: | N: | W: | |
| PN | 45HNMF | ||||||||||||
| 0.42 - 0.50 | 0.5 - 0.8 | 0.17 - 0.37 | <0.035 | <0.035 | 0.8 - 1.1 | 0.2 - 0.3 | 1.30 - 1.8 | 0.10 - 0.20 | - | <0.30 | - | - | |
| PN | 45HNMFA | ||||||||||||
| 0.42 - 0.50 | 0.5 - 0.8 | 0.17 - 0.37 | <0.025 | <0.025 | 0.8 - 1.1 | 0.2 - 0.3 | 1.30 - 1.8 | 0.10 - 0.20 | - | <0.30 | - | - | |
| GOST | 45ChN2MFA - 45KhN2MFA - 45ХН2МФА | ||||||||||||
| 0.42 - 0.50 | 0.5 - 0.8 | 0.17 - 0.37 | <0.025 | <0.025 | 0.8 - 1.1 | 0.2 - 0.3 | 1.30 - 1.8 | 0.10 - 0.18 | <0.03 | <0.30 | <0.008 | <0.2 | |
| GOST | 45ChNMFA - 45KhNMFA - 45ХНМФА | ||||||||||||
| 0.42 - 0.50 | 0.5 - 0.8 | 0.17 - 0.37 | <0.025 | <0.025 | 0.8 - 1.1 | 0.2 - 0.3 | 1.30 - 1.8 | 0.10 - 0.18 | <0.03 | <0.30 | <0.008 | <0.2 | |
| PN | L45HN2MF | ||||||||||||
| 0.40 - 0.50 | 0.5 - 0.8 | 0.30 - 0.60 | <0.035 | <0.035 | 1.2 - 1.4 | 0.4 - 0.6 | 1.60 - 2.0 | 0.15 - 0.25 | - | - | - | - | |
Structural steel 45HNMFA/45HN2MFA - description and specification
45HNMF steel has a very high hardening capacity, toughness, torsion, abrasion and wear resistance, which achieves the best mechanical properties after hardening in the oil with a dimensions of 170mm.
Products of this grade are designed for heavy-duty parts of engines, motor vehicles and even parts of mining machines. Despite their high quality, the products of this grade are practically non-weldable.
Materials of the 45HNMF grade are used, among others, for parts of mining machinery, parts of rock drills, heavy-duty parts of aircrafts such as chassis, crankshafts, gearbox shafts, and connecting rods.
General mechanical properties of 45HNMFA/45HN2MFA steel
| Mechanical properties of 45HNMF | ||
|---|---|---|
| Tensile strength | Rm | > 1470 MPa |
| Yield point | Re | > 1325 MPa |
| Elongation | A | > 7 % |
| Contraction | Z | >35 % |
| Notch toughness | KCU | > 40 J |
| Density | ρ | 7.86 kg/dm3 |
| Hardness | HB | < 269 HB |
45HNMFA / 45HN2MFA mechanical properties for individual dimensions
| Properties | Dimensions | |||||
|---|---|---|---|---|---|---|
| <16mm | 16 - 40mm | 40 - 100mm | 100 - 160mm | 160 - 250mm | ||
| Yield point | Re | 1320 - 1520 MPa | 1080 - 1270 MPa | 930 - 1080 MPa | 740 - 880 MPa | 740 - 880 MPa |
| Tensile strength | Rm | 1470 - 1670 MPa | 1270 - 1470 MPa | 1080 - 1270 MPa | 880 - 1080 MPa | 880 - 1080 MPa |
| Notch toughness | KCU | 40 - 80 J | 50 - 100 J | 50 - 100 J | 40 - 80 J | 40 - 80 J |
Heat treatment of 45HNMFA / 45HN2MFA steel
| Process | Cooling type | Temperatures |
|---|---|---|
| Normalizing annealing | slow | 680 - 720℃ |
| Softening annealing | in air | 850 - 880℃ |
| Hardening | in oil | 830 - 860℃ |
| Tempering | in air | 500 - 620℃ |
In the 45HNMFA grade the company supplies:
List of other indications and equivalents:
45ChN2MFA, 45KhN2MFA, 45ХН2МФА, 45ChNMFA, 45KhNMFA, 45ХНМФА, K24070, K 24070, 45CrNiMoVA, UNS K24045, UNS K 24045, ASTM A290, L45HN2MF, UNS K24245, UNS K 2425, ASTM A291.