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Mat.No. 1.7701, DIN 51CrMoV4, AISI 4150
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Designation by Standards Brand Name Ravne No. Mat. No. DIN EN AISI VZ727 727 1.7701 51CrMoV4 51CrMoV4 4150 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.54 0.28 0.90 1.05 0.20 - 0.20 - - DescriptionStructural Cr-Mo-V-steel. ApplicationsSeverely stressed springs for automobile industry – machine and engine parts, torsion springs, threaded springs, bark removing knives. Physical properties (avarage values) at ambient temperatureModulus of elasticit...
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Designation by Standards
| Brand Name | Ravne No. | Mat. No. | DIN | EN | AISI |
| VZ727 | 727 | 1.7701 | 51CrMoV4 | 51CrMoV4 | 4150 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.54 | 0.28 | 0.90 | 1.05 | 0.20 | - | 0.20 | - | - |
Description
Structural Cr-Mo-V-steel.
Applications
Severely stressed springs for automobile industry – machine and engine parts, torsion springs, threaded springs, bark removing knives.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.78
Continuous Cooling Transformation (CCT) Diagram
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Time-Temperature Transformation (TTT) Diagram
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Soft Annealing
Heat to 640-680oC, cool slowly. This will produce a maximum Brinell hardness of 255.
Normalizing
Temperature: 850-880oC.
Hardening
Harden from a temperature of 830-860oC followed by oil quenching.
Tempering
Tempering temperature: 350-550oC.
Mechanical Properties in Hardening and Tempering Condition at Ambient Temperature
| 0.2 % proof stress (N/mm2) | Tensile strength (N/mm2) | Elongation (%) |
| 1180 | 1370-1670 | 6 |
Forging
Hot forming temperature: 1050-850oC.
Machinability
Machining is best done with this alloy in the annealed or normalized and tempered condition. It can be machined by all conventional methods.
Forms manufactured: Please see the Dimensional Sales Program.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
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