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Hardness and heat treatment specification of grade 41CrAlMo7-10
|
Annealing hardness HBS |
Cold pull hardness HBS |
Preheating temperature ℃ |
Quenching temperature ℃ |
Holding time min |
Hardening medium |
Temper temperature ℃ |
After tempering hardness ≥HRC |
|
| salt-bath furnace | controlled atmosphere furnace | |||||||
| 235 | 262 | 788 | 1191 | 1204 | 5～15 | air cooling | 522 | 60 |
|
Steel plate/Sheet thickness / mm |
σb MPa |
σs ≥/MPa |
δ Samples from the standard for 50 mm (2 in) |
180 ° of cold bending test | |
| longitudinal | horizontal | ||||
| Hot-rolled/Cold rolling:5 - 150 | 520 | 415 | 16～18 | 2a | 3.5a |
|
Note: (1) listed in the table apex diameter (d), to steel thickness (a) multiples said. (2) in the ASTM A6 standard specified scope can meet any additional conditions. (3) from the standard for 50 mm (2 in). Mechanical properties Mechanische Eigenschaften Caracteristiques mecaniques ReH Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d’elasticite minimale Rm Tensile strength / Zugfestigkeit / Resistance a la traction A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc |
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