1.7131+A
- Tensile Strength
- 650 MPa
- Thermal Conductivity
- 41 W/(m·K)
- Elongation
- 18 %
- Chemical Composition
- C: 0.15%, Mn: 1.15%, Cr: 0.95%, Si: 0.25%, S: 0.015%, P: 0.015%
Other Names
- 14220
- SAE 5115
- 16MnCr5
- 15HG
Material Description
1.7131 / 16MnCr5 is a case-hardening steel that is normally machined before carburizing and hardening. In this condition it machines well with general-purpose tools and sharp stainless-steel geometries; a sharp cutting edge is usually more useful than a strong geometry intended for high-strength steels. After carburizing and quenching, the material develops a very hard surface layer, typically around 58–62 HRC and approximately 0.5–1.5 mm deep depending on the heat-treatment process, while the core remains significantly softer. Machining this hardened layer requires tools and grades intended for hardened steels. If a carburized component must be machined through the hardened case, consider a toolpath that allows the cutting edge to enter from the softer core rather than impacting directly into the hardened surface.