DIN 17212 Grade Cf70 quenched and tempered (+QT)

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Description

The in the quenched and tempered condition flame and induction hardenable unalloyed special steel has a, compared to the common quenched and tempered steel, constricted range of the C content and a lower maximum value of the P content. The steel is suitable for flash welding, if prooved conditions will be kept. For better machining the steel can be soft annealed. In this soft annealed and also in the normalised condition the material is unrestrained cold shearable. A maximum value for nonmetallic inclusions by arrangement. Delivery forms: - semi-finished product, rolled or forged - steel bars, hot-rolled or hot forged - wire, hot-rolled - sheet, strip and wide flats, hot-rolled - tubes, coils, seamless - open die and drop forgings Application: car industry, engine construction, mechanical engineering

Related Standards

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Eigenschaften

Allgemein

PropertyTemperatureValueComment

Dichte

23.0 °C

7.8 g/cm³

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Typical for Steel

Mechanisch

PropertyTemperatureValueComment

Dehnung

20.0 °C

11 - 13 %

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Elastizitätsmodul

23.0 °C

190 - 210 GPa

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Typical for Steel

Flächenreduzierung

20.0 °C

25 - 30 %

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Hardness, Rockwell F

20.0 °C

60 [-]

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Poissonzahl

23.0 °C

0.3 [-]

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Typical for Steel

Streckgrenze

20.0 °C

480 - 560 MPa

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Zugfestigkeit

20.0 °C

740 - 930 MPa

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Chemical properties

PropertyValue

Kohlenstoff

0.68 - 0.75 %

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Mangan

0.2 - 0.35 %

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Phosphor

0.03 %

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Schwefel

0.035 %

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Silizium

0.15 - 0.35 %

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