Description
SCM420 Round Bars / 18CrMo4 Round Bars / 1.7243 Round Bars
SCM420 Round Bars is a Low Alloy Chromium Molybdenum Structural Steel.
SCM420 are Alloy Steel with high hardenability, temper brittleness, well weldability, less cold cracking tendency, good machinability, and great cold plastic strain. SCM420 generally are used for the parts which need high wear resistance, such as gears, shafts, high-pressure pipes, all kinds of fasteners, and so on.
SCM420 is a chromium-molybdenum alloy steel, specifically a carburizing steel grade, widely recognized for its high hardenability, good wear resistance, and excellent toughness after heat treatment. It’s a popular choice in industries where components require a hard surface for wear resistance and a tough core to withstand shock and fatigue.
SCM420 Chemical Composition :
| Elements | Min. | Max. |
| C | 0.18 | 0.23 |
| Si | 0.15 | 0.35 |
| Mn | 0.60 | 0.90 |
| P | – | 0.030 |
| S | – | 0.030 |
| Ni | – | 0.25 |
| Cr | 0.90 | 1.20 |
| Mo | 0.15 | 0.25 |
| Cu | – | 0.30 |
Applications of SCM420 Round Bar :
SCM420 Round Bar Alloy Steels are widely used as gear components of all kind and cog wheels. Open die steel forgings for general engineering purposes.
• Automotive: Engine components, chassis parts, and suspension systems.
• Aerospace: Aircraft engine mounts, structural tubing, and other critical parts.
• Oil and Gas: High-pressure pipes and components.
• General Engineering: Machine parts, gears, and various high-strength components.
