39NiCrMo3 steel has high strength, toughness, good hardenability and stability against overheating, but it has high white point sensitivity and temper brittleness. Weldability is poor, high temperature preheating is required before welding, stress relief after welding, and use after quenching and tempering.
39NiCrMo3 equivalent grade
| EU EN |
Germany DIN |
Italy UNI |
USA
AISI/ASTM |
| 39NiCrMo3 | 36CrNiMo4 | 39NiCrMo3 | 9840 |
39NiCrMo3 mechanical properties
Tensile strength (MPa)≥980,
ElongationA (%) ≥12,
Reduction of area ≥55,
Impact energy Akv (J)≥78
