Mat.No. 1.0402, DIN C22, AISI 1020

Designation by Standards

Chemical Composition (in weight %)

Description C22 is one of the very commonly used plain carbon steels. It has a nominal carbon content of 0.22% with approximately 0.55% manganese. It is a good combination of strength and ductility and may be hardened or carburized.  Applications C22 steel is used for simple structural application such as cold headed bolts. It is often used in the case hardened condition. Physical properties (avarage values) at ambient temperature Modulus of elasticity [10³ x N/mm²]: 210  Density [g/cm³]: 7.70 Thermal conductivity [W/m.K]: 51.9  Electric resistivity [Ohm mm²/m]: 0.11 Specific heat capacity[J/g.K]: 0.46 Soft Annealing Heat to 870-980^oC, cool slowly. This will produce a minimum tensile strength of 450 Mpa. Stress Relieving Stress relieving to remove machining stresses should be carried out by heating to approx. 540^oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment. Hardening Harden from a temperature of 820-870^oC followed by water quenching. Tempering Tempering temperature: Please ask. Diagram Tempering Temperature – Mechanical Properties Forging Hot forming temperature: 1200-950^oC.  Machinability Machinability is good at 65% compared to 1112 carbon steel as 100% baseline. Corrosion Resistance  Not corrosion resistant. The steel will rust unless protected. Welding  Readily weldable by all of the standard methods. Cold working  C22 steel is readily cold worked by all conventional methods. A stress relief anneal may be needed after extensive cold work. Disclaimer The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.