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  • Mat.No. 1.5122, DIN 37MnSi5
  • Mat.No. 1.5122, DIN 37MnSi5

Mat.No. 1.5122, DIN 37MnSi5

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Specification, Chemical & Mechanical Performance

We can produce 1.5122, DIN 37MnSi5 stainless steel round rods, forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With Bozhong Group production experience, strict control 1.5122, DIN 37MnSi5 chemical composition and 1.5122, DIN 37MnSi5 mechanical properties.From casting, forging, steel to hot and cold rolling process, heat treatment, etc, we have the control of professional engineers. We have advanced precision machining equipment, according to the requirements of users machining. in order to achieve the most satisfied with the user requirements.


Round bar steel: 1mm to 3500mm

Square-shape steel: 1mm to 4000mm

Plate steel:0.1mm to 4000mm

Width: 10mm to 2500mm

Lenth: We can supply any lenth based on the customer's requirement.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Tubings: OD: φ6-1800mm, with wall thickness ranging from 1-35 mm.

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode. 

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price. We serve you with our honesty, integrity, and professionality.


Designation by Standards

Brand Name Ravne No. Mat. No. DIN EN AISI
VMS135 707 1.5122 37MnSi5 - -


Chemical Composition (in weight %)

C Si Mn Cr Mo Ni V W Others
0.37 1.25 1.25 - - - - - -



Structural steel. Parts of high core stability and good toughness like gear parts etc. 


Low and moderately stressed components for vehicles, machines and engines.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210 
Density [g/cm3]: 7.85
Thermal conductivity [W/m.K]: 25.0 

Coefficient of Linear Thermal Expansion 10-6 oC-1

20-100oC 20-300oC 20-500oC
11.1 12.9 13.9

Soft Annealing
Heat to 680-720oC, cool slowly. This will produce a maximum Brinell hardness of 217.



Temperature: 860-890oC.


Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 120-200oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.


Harden from a temperature of 820-850oC followed by water or oil quenching. Hardneess after quenching is 52-54 HRC.


Tempering temperature: 480-60oC, air.

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 VMS135 alloy may be cold worked, in the annealed condition, by conventional methods and tooling. It has good ductility.