Round bar drawn h9 diameter 30 mm 1.7227 QT - 42CrMoS4+QT - 15 142 QT

Designation

• EN/DIN: 42CrMoS4

• Material number: 1.7227

• Group: alloyed chromium-molybdenum engineering steel

• Related grade: 42CrMo4 (1.7225) – without sulphur

“S” = added sulphur for improved machinability
“+QT” = quenched and tempered delivery condition

Chemical composition (%)

C: 0.38–0.45 | Mn: 0.60–0.90 | Cr: 0.90–1.20 | Mo: 0.15–0.30 | Si: <=0.40 | P: <=0.025 | S: 0.020–0.040

Mechanical properties (+QT)

• Tensile strength Rm: 900–1100 MPa

• Yield strength Re: 700–900 MPa

• Elongation A: 12–14 %

• Impact toughness KV: >= 35 J at +20 °C

• Hardness HB: 270–320

Properties

• high strength and toughness

• good machinability (due to sulphur)

• fatigue and impact resistance

• excellent response to quenching and tempering

Applications

Shafts, gears, couplings, pins and other heavy-duty parts requiring a combination of strength, toughness and machinability.