Available Shapes
826M40 Alloy Steel
826M40 is a 2.5% nickel – chromium – molybdenum high hardenability, high tensile steel, generally supplied hardened and tempered in the tensile range 1000 – 1150 Mpa (Condition V) Rc 31 – 38. Characterized by high strength and toughness in very large sections – similar to EN25 but with higher carbon content, particularly suitable where high surface pressure exists. Pre hardened and tempered EN26 can be further surface hardened by flame or induction hardening, and by nitriding
Applications
Analysis
Forging
Annealing
Hardening
Flame and Induction Hardening
Tampering
Applications
826M40 alloy steels are used for Axles, Connecting Rods, Die Holders, Hydraulic Shafts, Spindles, Motor Shafts, Pins, Rams, Rolls, Sockets, Tool Holders, Torsion Bars etc. 817M40T.
Analysis
| Carbon | 0.36-0.44% | Nickel | 2.30-2.80% |
| Manganese | 0.45-0.70% | Chromium | 0.50-0.80% |
| Silicon | 0.10-0.35% | Molybdenum | 0.45-0.65% |
| Phosphorous | 0.035% max | ||
| Sulphur | 0.040% max |
Forging
To forge pre heat the 826M40 carefully, then raise the temperature to 1150-1200°C and hold at temperature until thoroughly soaked and suitable to forge. Do not forge below 850°C. After forging the 826M40 should be cooled slowly.
Annealing
Heat the steel slowly to 790-840°C. Hold until the temperature is uniform throughout the steel. Cool in a furnace.
Hardening
826M40W is supplied ready heat treated. If further heat treatment is required annealed 826M40 should be heated to 820-850°C and hold until the temperature is uniform through the section. Quench the 826M40 steel in oil, water or polymer as required.
Flame and Induction Hardening
826M40 can be flame or induction hardened to achieve a good surface hardness.
Tampering
Heat the 826M40 component to the required tempering temperature between 450°/660°C and thoroughly soak for two hours per 25mm thickness of section, cool in still air.
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