PN 25HM Structural and constructional steels
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PN 25HM Chemical Composition
PN-H-84030-04: 1989 / Structural alloyed steel - Steel for heat treatment (quenching + tempering) and surface hardening - Grades
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PN 25HM Physical Properties
Temperature
This material has 524 properties — only a subset is shown here.
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PN 25HM Heat Treatments
- Hardening in hot water or oil at 860ºC then Tempering in water or oil at 550ºC.
- Hardening in oil or hot water at 860ºC then Tempering in oil or water at 550ºC; Hardening temperature: 850°C; Delivery forgings: Heat treated at 1050-850°C: Softening: 680-720°C; Normalizing: 860-900°C; Hardening in water at 840-870°C or in the oil at 850-880°C: Tempering: recommended for dismounted cooling after tempering (oil or water) at 540-680°C.
PN 25HM Mechanical Properties
Temperature
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PN 25HM 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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- 238Cross References
- 21Composition
- 78Mechanical Properties
- 3Physical Properties
- 3Heat Treatment
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