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 values for a reference section and heat-treatment condition. Actual properties vary with dimension and treatment, and are confirmed on the mill certificate.
Available forms.
Size: 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 and 5115 are matching designations for the same steel across different standards (EN, AISI/SAE, JIS, GB, former DIN). They are near equivalents and may differ slightly in chemistry, so 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.