Lloyds LR Type 640 Structural and constructional steels
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This material has 110 properties — only a subset is shown here.
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Lloyds LR Type 640 Chemical Composition
Rules for the Manufacture, Testing and Certification of Materials, Chapter 5 Section 4; Steel Forgings; Forgings for crankshafts, Lloyd's Register, 2025
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Lloyds LR Type 640 Physical Properties
Temperature
This material has 110 properties — only a subset is shown here.
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Lloyds LR Type 640 Heat Treatments
- The tempering and stress relieving temperatures are to be not less than 600°C. The holding times and subsequent cooling rates are to be such that the forging in its final condition is free from harmful residual stresses.
- Quenched and tempered. The tempering temperature is to be not less than 550°C.
Lloyds LR Type 640 Mechanical Properties
Temperature
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Lloyds LR Type 640 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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- 45Cross References
- 27Composition
- 32Mechanical Properties
- 3Physical Properties
- 3Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- -Total Suppliers