39NCD3 40NCD3


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Soft Annealing of 39NCD3 40NCD3 40 NCD 3
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 248.

Normalizing of 39NCD3 40NCD3 40 NCD 3
Temperature: 850-880oC.

Harden from a temperature of 820-860oC followed by water or oil quenching.

Tempering temperature: 540-680oC.

Mechanical Properties in Hardening and Tempering Condition

Diameter (mm) 0.2 % proof stress (N/mm2) Tensile strength (N/mm2) Elongation (%) Reduction of area (%) Notch impact energy (J)
<16 900 1100-1300 10 45 40
17-40 800 1000-1200 11 50 45
41-100 700 900-1100 12 55 50
101-160 600 800-950 13 60 50
161-250 550 750-900 14 60 50

Forging of 39NCD3 40NCD3 40 NCD 3
Hot forming temperature: 1050-850oC. 

Machinability of 39NCD3 40NCD3 40 NCD 3
Machining is best done with this alloy in the annealed or normalized and tempered condition. It can be machined by all conventional methods.

Corrosion Resistance of 39NCD3 40NCD3 40 NCD 3
This is a low alloy steel and not a corrosion resistant alloy. Protective coating should be used.

Welding of 39NCD3 40NCD3 40 NCD 3
The alloy can be fusion or resistance welded. Preheat and post heat weld procedures should be followed when welding this alloy by established methods.

Cold working 
39NCD3 40NCD3 40 NCD 3 alloy may be cold worked, in the annealed condition, by conventional methods and tooling. It has good ductility.

39NCD3 40NCD3