UNI 55 Si 7 Structural and constructional steels
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This material has 139 properties — only a subset is shown here.
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UNI 55 Si 7 Chemical Composition
UNI 3545: 1980 / Hot rolled special alloyed steel finished products, bars and wire rod, for quenched and tempered springs. Qualities, requirements and tests
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UNI 55 Si 7 Physical Properties
Temperature
This material has 139 properties — only a subset is shown here.
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UNI 55 Si 7 Heat Treatments
- This material is normally supplied in the annealed or normalized condition. The following temperatures are given in the specification as guidelines. Anneal at 640 to 700°C. Normalize at 865°C and air cool. Except for the Brinell hardness values, the values shown in the mechanical properties table apply to longitudinal testing of 10mm diameter test pieces subjected to the following quench and temper reference heat treatment (Q + T): Harden by oil quenching from 855°C +/- 10°C, after holding at temperature for a minimum of 1/2 hour, and temper at 480°C +/- 20°C for a minimum of 1 hour. The final heat treatment of springs may be carried out as follows (these are guideline temperatures only): Harden by oil quenching from 840 to 870°C. Temper at 400 to 450°C.
UNI 55 Si 7 Mechanical Properties
Temperature
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UNI 55 Si 7 International Equivalent Materials
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Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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- 63Cross References
- 12Composition
- 5Mechanical Properties
- 3Physical Properties
- 5Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 51Total Suppliers