Name: Scm440 4140 Q345 St52 S355jr Steel crankshaft
Equivalent grades
| GB |
DIN |
AISI |
JIS |
| 42CrMo |
1.7225 |
4140 |
SCM440 |
Chemical Composition
| C |
Si |
Mn |
Cr |
Mo |
P |
S |
| 0.38-0.43 |
0.40max |
0.60-0.90 |
0.90-1.20 |
0.15-0.30 |
≤0.035 |
≤0.035 |
Available size
| Round steel bar 60-800mm |
| Flat steel bar 25-400mm*200-800mm |
Surface condition
| Black surface/ Grinded/ Machined |
Hardness
Characteristics
4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability.
High toughness. High creep strength. Repeated impact resistant capability. |
Applications
4140 Alloy Steel/SAE 4140 Steel Price is use to produce components with high requirements on toughness, e.g. gear wheels, pinions,
connecting rods, parts for mechanical engineering . |
Heat treatment
| Forging |
Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc. |
| Annealing |
Heat to 830°C-850°C.Cool in furnace. |
| Normalizing |
Heat to 870°C-900°C.Cool in still air. |
| Stress Relieving |
Annealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air. |
| Hardening |
Heat to 830°C-880°C. Quench in oil or polymer. |
| Tempering |
Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided. |
Steel Grades We can Supply
Cold work tool steel
DIN 1.2067, 1.2080, 1.2363, 1.2379, 1.2436, 1.2510, 1.2550, 1.2746, 1.2767, 1.2842, etc.
AISI L1, L3, D3, D2, D6, A2, A5, O1, O2, 6F7, etc.
JIS SUJ2, SKD1, SKD11, SKD12, SNCM2, DC53(DAIDO), etc.
Hot work tool steel
DIN 1.2343, 1.2344, 1.2365, 1.2367, 1.2581, 1.2714, 1.2885, etc.
AISI H10, H10A, H11, H12, H13, H21, L6, S7
JIS SKD61, SKT4, etc.
Plastci mould steel
DIN 1.2083, 1.2085, 1.2311, 1.2312, 1.2316, 1.2738, etc.
AISI 420, P20, P20+S, P20+Ni, etc.
DAIDO NAK80
High speed tool steel
DIN 1.3343, 1.3355/ AISI M2, T1.
Alloy steel
AISI/SAE 4140, 4130, 4340, 8620, 8640, etc.
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