- 1.2311, DIN 40CrMnMo7, AISI Approx. P20 round bar
- 1.2311, DIN 40CrMnMo7, AISI Approx. P20 forging
- 1.2311, DIN 40CrMnMo7, AISI Approx. P20 sheet
- 1.2311, DIN 40CrMnMo7, AISI Approx. P20 flat bar
- 1.2311, DIN 40CrMnMo7, AISI Approx. P20 pipe
1.2311, DIN 40CrMnMo7, AISI Approx. P20
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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1.2311, DIN 40CrMnMo7, AISI Approx. P20
Designation by Standards
Brand Name | LH No. | Mat. No. | DIN | EN | AISI |
UTOPNEX | 772 | 1.2311 | 40CrMnMo7 | - | Approx. P20 |
Chemical Composition (in weight %)
C | Si | Mn | Cr | Mo | Ni | V | W | Others |
0.40 | 0.30 | 1.45 | 1.95 | 0.20 | - | - | - | - |
Description
Prehardened plastic Mould-steel/" target="_blank" class="keylink">mould steel with good machinability, better than steel grade Mat. No. 1.2312, suitable for texturing.
Applications
Plastic moulds, mould frames for plastic moulds, large injection moulds, pressure casting dies,recipient sleeves.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.83
Thermal conductivity [W/m.K]: 34.0 (100oC), 34.0 (150oC), 33.6 (200oC), 32.9 (250oC), 31.9 (300oC), in quenched and tempered condition.
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 | 13.1 | 13.5 | 14.0 | 14.4 | 14.6 | 14.7 |
Continuous Cooling Transformation (CCT) Diagram
Soft Annealing
Heat to 710-740oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 830-880oC followed by oil or air quenching or warm bath quenching 180-220oC. Hardness after quenching is 51 HRC.
Tempering
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
100oC | 200oC | 300oC | 400oC | 500oC | 600oC | 700oC |
51 | 50 | 48 | 46 | 42 | 36 | 28 |
Tempering Diagram
Forging
Hot forming temperature: 1050-850oC.
Machinability
Machinability is relatively good at about 80% that of the W group water hardening steels
Corrosion Resistance
This is a steel alloy and it will corrode or rust unless protected.
Welding
This alloy is weldable by conventional methods. Contact the alloy supplier for details and weld procedures.
Cold working
This steel may be readily cold worked by conventional tooling with the alloy in the annealed condition.
Mechanical properties
Heat treatment
Machining
Welding performance
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