1.7225 | 4140 | SCM440
It is a high-strength low-alloy steel with excellent comprehensive mechanical properties and good machinability. It features high creep strength, high toughness and repeated impact resistance.
Available Form
Round Bar
Custom Diameter & Length
Flat Bar
Custom Thickness, Width & Length
Square Bar
Custom Width & Length
Steel Plate
Custom Thickness, Width & Length
Steel Grade Comparison(wt%)
| W-Nr | EN | AISI | JIS |
| 1.7225 | 42CrMo4 | 4140 | SCM440 |
Chemical Composition
| C | Si | Mn | P | S | Cr | Mo | V |
| 0.27~0.34 | ≤0.60 | 0.60~1.00 | ≤0.025 | ≤0.020 | 1.30~1.70 | 0.30~0.50 | 0.05~0.15 |
Physical Properties
Density（g/cm3)：7.80
Modulus of Elasticity（Gpa): 210
Thermal Conductivity（W/（m.k)): 20~30
Heat Treatment Process
Hardening: Heat the steel evenly to 850-880°C until the whole section reaches temperature. Then quench in oil to cool.
Annealing: Heat the steel to 680-720°C, hold it well at temperature, and then let it cool slowly inside the furnace.
Tempering: Tempering temperature 400°C
Application Fields
Suitable for medium and high-stress components in the automotive industry and mechanical engineering, such as shafts, connecting rods, crankshafts, screws, etc.
Disclaimer: the information and data presented herein are typical values for reference and are not intended as warranties to readers.
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