1.7281
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DIN SEW 028 (1993) / DIN EN 10216-2 specification alloy steel 1.7281 round bar, flat bar, plate, rod, - steelmaking, ESR, hot bloomed, forged, rolled, heat treat
Official test report: issued by TUV - SGS - BV
TECHNICAL DATA SHEET - DIN 1.7281
Material category: high temperature pressure vessel steel
Technical standards: DIN SEW 028 (1993), DIN EN 10216-2 (2004)
Typical chemical compositions (mass weight %)
Carbon, C (％): 0.12 ~ 0.20
Silicon, Si (％): 0.15 ~ 0.35
Manganese, Mn (％): 0.30 ~ 0.50
Phosphorus, P (％): ≤: 0.035
Sulfur, S (％): ≤: 0.035
Chromium, Cr (％): 2.00 ~ 2.50
Molybdenum, Mo (％): 0.30 ~ 0.40
Silicon, Si (％): 0.15 ~ 0.35
Manganese, Mn (％): 0.30 ~ 0.50
Phosphorus, P (％): ≤: 0.035
Sulfur, S (％): ≤: 0.035
Chromium, Cr (％): 2.00 ~ 2.50
Molybdenum, Mo (％): 0.30 ~ 0.40
MECHANICAL PROPERTIES - UNDER ROOM TEMPERATURE
Condition: 920 ~ 970 ℃ quenched and 620 ~ 650 ℃ tempered
Tensile strength, σb ≥ MPa: 540～640
Yield strength, σs ≥ MPa: 345
Elongation, δ5 ≥ (%): 20
Impact strength, AKV ≥ J: 55
Annealed hardness HBS: 160～190
Yield strength, σs ≥ MPa: 345
Elongation, δ5 ≥ (%): 20
Impact strength, AKV ≥ J: 55
Annealed hardness HBS: 160～190
HOT WORKING AND HEAT TREATMENT
Hot working temperature /℃: 1100～850
Annealing temperature /℃: 680～730
Quenching temperature /℃: 920～970
Cooling medium: oil or air quenched
Annealing temperature /℃: 680～730
Quenching temperature /℃: 920～970
Cooling medium: oil or air quenched
Tempering temperature /℃: 620～650
AVAILABLE SHAPES
Plate / Steel strip / Sheet / Flat bar / Shaft
Bright - milling, polishing, cold machined/finished
Plate / Steel strip / Sheet / Flat bar / Shaft
Bright - milling, polishing, cold machined/finished
PRODUCT DESCRIPTION
High room and elevated temperature strength.
High notch tolerance.
Thermal expansion coefficients compatible with low alloy steel turbine casing materials.
Lower design and operating risks
Simplified design for bolting configuration compared with martensitic steels or high nickel alloys.
High room and elevated temperature strength.
High notch tolerance.
Thermal expansion coefficients compatible with low alloy steel turbine casing materials.
Lower design and operating risks
Simplified design for bolting configuration compared with martensitic steels or high nickel alloys.
Proven performance in long-term service.
Extensive database of long term, high temperature test results.
Extensive database of long term, high temperature test results.
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,
Final heat treatment - QT.
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,
Final heat treatment - QT.
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.
Pressure vessel.
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.
Pressure vessel.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers - E-mail: sales@ccsteels.com
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers - E-mail: sales@ccsteels.com
PRODUCT PROFILE & DIMENSIONS
Rod / round bar / disc (diameter): 6.0 to 900 mm
Square bar / flat bar: 10 to 600 mm
Length: random length or based on the customer's special requirement.
Rod / round bar / disc (diameter): 6.0 to 900 mm
Square bar / flat bar: 10 to 600 mm
Length: random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 ~ 300 X W20 ~ 1500 X L1000 ~ 6000 mm
Sheet steel via cold rolled: T0.5 ~ 6 X W10 ~ 1000 X L1000 ~ 2000 mm
Steel strip via cold rolled: T0.3 ~ 3 X W15 ~ 200 X L mm (or in coil form)
Forging piece: stepped shafts, and /other different shapes based on OEM.
Sheet steel via cold rolled: T0.5 ~ 6 X W10 ~ 1000 X L1000 ~ 2000 mm
Steel strip via cold rolled: T0.3 ~ 3 X W15 ~ 200 X L mm (or in coil form)
Forging piece: stepped shafts, and /other different shapes based on OEM.
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