31CrMo12
2015-01-30 09:24:01 Origin： Remark：0 Click：
Carburized Structural Steel 31CrMo12 Flat bar, Inventory 31CrMo12 Forgings 31CrMo12 Round bar, ESR, Hot forging, rolling, heat treatment
MATERIAL TECHNICAL SPECIFICATION - DIN 31CrMo12 & W-Nr 1.8515
MATERIAL CATEGORY - Carburized structural steel
PRODUCT DESCRIPTION
Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.
The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.
The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - heat treatment / QT
MATERIAL SPECIFICATIONS - DIN EN 10085 (2001), DIN 17211 (1987)
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.28 ~ 0.35
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.40 ~ 0.70
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 2.80 ~ 3.30
Molybdenum, Mo (％): 0.30 ~ 0.50
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working temperature /℃: 1100 ~ 900
Heat treatment temperature /℃|annealing: 650～700
Heat treatment temperature /℃|quenching: 870~910 oil
Heat treatment temperature /℃|tempering: 570～700
Heat treatment temperature /℃|carburizing: 500～520
Hardness after annealing HBS≤: 248
Size /mm: ≤40
Tensile strength, Rm MPa: 1130
Yield strength, Rp0.2 ≥ MPa: 835
Elongation, A5 (％) ≥: 10.0
Impact strength, |AKv/J (DVM-V form sampling): 48
Size /mm: ≤100
TS, |σb/MPa: 1200
YS, |σs≥/MPa: 800
Elongation, |δ5(％)≥: 11.0
Impact, |AKV/J (DVM-V form sampling): 40
Size /mm: ≤250
TS, |σb/MPa: 1100
YS, |σs≥/MPa: 700
E, |δ5(％)≥: 12
Impact, |AKV/J (DVM-V form sampling): 50
Hardness of Carburized layer |HV: 950
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners.
Mechanical gears, gear shaft, main axis, valve rod.
Mechanical parts - connecting rod, bolt and nut.
Multidiameter shaft and pressure vessel.
SHAPE & DIMENSIONS
Round bar & Disc (diameter): 5.5mm to 600mm
Square bar / Flat bar: 3mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200mm X W10 - 1500mm X L1000-12000mm
Sheet steel via cold rolled: T0.5 - 6mm X W6 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shaft, and other different shapes based on OEM.
ADVANTAGE & SUPERIOR SERVICE
20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
CNC saw cutting.
Marking by stamping or printing.
Third party inspection service.
Export packing / Export documents.
Transport by Track, Sea, Courier (FedEx, UPS, DHL) and Air Cargo.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry or help, pleased to EMAIL our resident team of qualified production engineers, Email:sales@ccsteels.com
MATERIAL CATEGORY - Carburized structural steel
PRODUCT DESCRIPTION
Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.
The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.
The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - heat treatment / QT
MATERIAL SPECIFICATIONS - DIN EN 10085 (2001), DIN 17211 (1987)
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.28 ~ 0.35
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.40 ~ 0.70
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 2.80 ~ 3.30
Molybdenum, Mo (％): 0.30 ~ 0.50
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working temperature /℃: 1100 ~ 900
Heat treatment temperature /℃|annealing: 650～700
Heat treatment temperature /℃|quenching: 870~910 oil
Heat treatment temperature /℃|tempering: 570～700
Heat treatment temperature /℃|carburizing: 500～520
Hardness after annealing HBS≤: 248
Size /mm: ≤40
Tensile strength, Rm MPa: 1130
Yield strength, Rp0.2 ≥ MPa: 835
Elongation, A5 (％) ≥: 10.0
Impact strength, |AKv/J (DVM-V form sampling): 48
Size /mm: ≤100
TS, |σb/MPa: 1200
YS, |σs≥/MPa: 800
Elongation, |δ5(％)≥: 11.0
Impact, |AKV/J (DVM-V form sampling): 40
Size /mm: ≤250
TS, |σb/MPa: 1100
YS, |σs≥/MPa: 700
E, |δ5(％)≥: 12
Impact, |AKV/J (DVM-V form sampling): 50
Hardness of Carburized layer |HV: 950
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners.
Mechanical gears, gear shaft, main axis, valve rod.
Mechanical parts - connecting rod, bolt and nut.
Multidiameter shaft and pressure vessel.
SHAPE & DIMENSIONS
Round bar & Disc (diameter): 5.5mm to 600mm
Square bar / Flat bar: 3mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200mm X W10 - 1500mm X L1000-12000mm
Sheet steel via cold rolled: T0.5 - 6mm X W6 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shaft, and other different shapes based on OEM.
ADVANTAGE & SUPERIOR SERVICE
20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
CNC saw cutting.
Marking by stamping or printing.
Third party inspection service.
Export packing / Export documents.
Transport by Track, Sea, Courier (FedEx, UPS, DHL) and Air Cargo.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry or help, pleased to EMAIL our resident team of qualified production engineers, Email:sales@ccsteels.com
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