- 1.3348, DIN S2-9-2, AISI M7 round bar
- 1.3348, DIN S2-9-2, AISI M7 forging
- 1.3348, DIN S2-9-2, AISI M7 sheet
- 1.3348, DIN S2-9-2, AISI M7 flat bar
- 1.3348, DIN S2-9-2, AISI M7 pipe
1.3348, DIN S2-9-2, AISI M7
Production specification
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.
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1.3348, DIN S2-9-2, AISI M7
Designation by Standards
Brand Name | LH No. | Mat. No. | DIN | EN | AISI |
BR885 | 885 | 1.3348 | S2-9-2 | HS2-9-2 | M7 |
Chemical Composition (in weight %)
C | Si | Mn | Cr | Mo | Ni | V | W | Others |
0.98 | max. 0.70 | max. 0.40 | 4.00 | 8.70 | - | 1.95 | 1.80 | - |
Description
M7 is one of the High Speed Tool Steels in the molybdenum alloy family, with tungsten, chromium and vanadium for strengthening. It has good hardenability and is very wear resistant. Very high resistance to softening at elevated temperatures and good toughness. Deep hardening response.
Applications
M7 is widely used for cutting tools in machining operations. Sendzimir rolls, segment and circular cutters, profile cutting tools, thread cutting drills and cold forming tools.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 217
Density [g/cm3]: 8.30
Thermal conductivity [W/m.K]: 19.0
Electric resistivity [Ohm mm2/m]: 0.65
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6 oC-1
20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC | 20-600oC | 20-700oC |
11.7 | 12.5 | 12.9 | 13.2 | 13.4 | 13.4 | 13.4 |
Soft Annealing
Heat to 820-880oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230-280.
Hardening
Heat up to 450-600oC, preheat to 850oC and then to 1050oC. Harden from a temperature of 1180-1220oC followed by oil, air quenching or warm bath at 550oC. Hardness after quenching is 64-66 HRC.
Tempering
Tempering temperature: 3 x 1 hour at 540-560oC. Hardness after tempering is min 64 HRC.
Forging
Hot forming temperature: 1100-900oC.
Cold Working: In the annealed condition M7 may be cold worked by conventional methods.
Machinability
Machinability is medium, rating about 60% that of the W group water hardening low alloy steel/" target="_blank" class="keylink">tool steels at 100% for comparison.
Corrosion Resistance
Although this alloy contains chromium and molybdenum it is still a steel and thus will corrode. It should be protected from rusting.
Welding
This is a complex alloy but is weldable. Consult the supplier for procedures and details.
Mechanical properties
Heat treatment
Machining
Welding performance
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