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  • AISI 6145/6150 / 1.8159 / DIN 50CrV4
  • AISI 6145/6150 / 1.8159 / DIN 50CrV4

AISI 6145/6150 / 1.8159 / DIN 50CrV4

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Specification, Chemical & Mechanical Performance

Designation by Standards

Brand Name Ravne No. Mat. No. DIN EN AISI
VCV150 732 1.8159 50CrV4 50CrV4 6145/6150

Chemical Composition (in weight %)

C Si Mn Cr Mo Ni V W Others
0.51 max. 0.40 0.90 1.05 - - 0.18 - -

VCV150 is a heat treatable, low alloy steel containing manganese, chromium and vanadium. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. 

Permanently stressed machine, engine and vehicle parts when high strength and toughness are required.Most severely stressed springs for trucks, torsion springs. 

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210 
Density [g/cm3]: 7.84


Soft Annealing
Heat to 640-720oC, cool slowly. This will produce a maximum Brinell hardness of 248.

Temperature: 840-880oC.

Harden from a temperature of 820-860oC followed by 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 (ISO-V) (J)
<16 900 1100-1300 9 40 30
17-40 800 1000-1200 10 45 30
41-100 700 900-1100 12 50 30
101-160 650 850-1000 13 50 30
161-250 600 800-950 13 50 30

Hot forming temperature: 1050-850oC. 

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 
This is a low alloy steel and not a corrosion resistant alloy. Protective coating should be used.

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 
The VCV150 alloy may be cold worked, in the annealed condition, by conventional methods and tooling. It has good ductility.

Forms manufactured: Please see the Dimensional Sales Program. 

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.