Round bar drawn h9 diameter 18 mm 1.7139 - 16MnCrS5 - 14 220

Designation

• EN/DIN: 16MnCrS5

• Material number: 1.7139

• ČSN/STN: 14 241

• AISI/SAE equivalent: approx. 5115 (with sulphur for improved machinability)

• Group: alloyed case-hardening steel (Cr–Mn)

Chemical composition (typical values, %)

C: 0.14–0.19 | Mn: 1.00–1.30 | Cr: 0.80–1.10 | Si: <=0.40 | P: <=0.025 | S: 0.020–0.040

Compared to 16MnCr5, it has a higher and controlled sulphur content, which improves machinability.

Mechanical properties (normalized condition, not carburised)

• Rm: approx. 550–750 MPa

• Re: min. 300 MPa

• A: min. 14 %

• Hardness HB: 170–220
  (after carburising & quenching: surface 58–62 HRC, core 30–40 HRC)

Properties

• suitable for carburising (hard surface + tough core)

• good machinability (due to sulphur)

• medium weldability (preheating recommended)

• high wear resistance after carburising

Applications

Automotive and mechanical engineering – gears, shafts, camshafts, clutches, pins and other stressed parts requiring a hard surface and a tough core.