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Carburizing DIN 1.7131

Alloy case-hardening steel with good core toughness

DIN 1.7131 is an alloyed case-hardening steel with the designation 16MnCr5, suitable for components requiring a hard, wear-resistant surface and a tough core. Due to the manganese and chromium content, it responds well to case-hardening and heat treatment. After case-hardening and quenching, it reaches a surface hardness of up to 62 HRC. It is used in the automotive and mechanical engineering industries for the production of pins, gears and shafts.


Alternative designation: 16MnCr5, ČSN 14220
Type: Alloy case-hardening steel

Heat treatment:

  • Carburizing: 880–950 °C

  • Quenching after carburizing: 780–820 °C (oil)

  • Tempering: 150–200 °C (to relieve stress without reducing surface hardness)

  • Core refinement (before carburizing): hardening 830–860 °C + tempering 400–650 °C

Round bars, rolled, peeled, forged, annealed

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Forged, annealed blocks


410

510

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1010






410

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Rolled, annealed sheets

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Features:

  • Suitable for carburizing and subsequent hardening

  • High surface hardness after carburizing (up to 60–62 HRC)

  • Tough and solid core – impact resistance

  • Good machinability before case hardening

  • Good dimensional stability during heat treatment

  • Poor weldability – caution required (preheating, heat treatment)

Use:

  • Gears, shafts, camshafts and crankshafts

  • Pins, bushings, pinions

  • Connecting and guiding elements with wear resistance requirements

  • Parts requiring a hard surface and a tough core

  • Applications in the automotive and mechanical industries

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