Case-Hardening Steel
16MnCr5 · 1.7131
Also known as 5115
Case-hardening steel for gears with a hard wear surface and tough core.
16MnCr5 (material 1.7131) is a chromium-manganese case-hardening (carburising) steel. After carburising and hardening it develops a hard, wear-resistant surface over a tough core, making it a standard choice for gears, shafts and transmission parts. Supplied as hot-rolled and cold-drawn bar.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN 10084. Mill certificate governs.
| Element | % |
|---|---|
| C | 0.14 – 0.19 |
| Si | ≤ 0.40 |
| Mn | 1.00 – 1.30 |
| Cr | 0.80 – 1.10 |
| P | ≤ 0.025 |
| S | ≤ 0.035 |
Mechanical properties.
Indicative; depends on dimension and heat treatment.
Available forms.
Size range: Ø 6 – 200 mm
Typical applications.
- Gears & pinions
- Camshafts
- Transmission shafts
- Bushings
FAQ.
What is 16MnCr5?
16MnCr5 (material 1.7131) is a chromium-manganese case-hardening (carburising) steel. After carburising and hardening it develops a hard, wear-resistant surface over a tough core, making it a standard choice for gears, shafts and transmission parts. Supplied as hot-rolled and cold-drawn bar.
Is 16MnCr5 the same as 5115?
Yes — 16MnCr5 is the European (EN) designation, while 5115 are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; the mill certificate governs the exact specification.
What are the international equivalents of 16MnCr5?
16MnCr5 corresponds to 16MnCr5 (1.7131) (EN), 5115 (near) (AISI / SAE), SCr415 (near) (JIS), 16MnCr5 (GB). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is 16MnCr5 available?
16MnCr5 is supplied as Round bar, Bright / cold-drawn bar, in Ø 6 – 200 mm.
What is 16MnCr5 used for?
Typical applications include Gears & pinions, Camshafts, Transmission shafts, Bushings.