S120
2025-09-09 12:13:00 Origin： Remark：0 Click：
Aersopace alloy S120 is a 2.5%Ni-Cr-Mo ESR quality high tensile structure steel, EN 25 Bars are usually supplied bright in the annealed condition or hardened
TECHNICAL DATA SHEET - BS S120
Official test certificate: issued by TUV - SGS - BV
Type of steel: 2.5%Ni-Cr-Mo Steel
Typical chemical compositions (mass weight %)
Carbon, C (％): 0.27 ~ 0.35
Silicon, Si (％): 0.10 ~ 0.35
Manganese, Mn (％): 0.45 ~ 0.70
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 0.50 ~ 0.80
Silicon, Si (％): 0.10 ~ 0.35
Manganese, Mn (％): 0.45 ~ 0.70
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 0.50 ~ 0.80
Nickel, Ni (%): 2.30 ~ 2.80
Molybdenum, Mo (％): 0.45 ~ 0.55
Molybdenum, Mo (％): 0.45 ~ 0.55
Equal to: EN 25
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Condition: Heat treatment
Tensile strength, σb ≥ MPa: 980
Yield strength, σs ≥ MPa: 785
Elongation, δ5 ≥ (%): 12.0
Yield strength, σs ≥ MPa: 785
Elongation, δ5 ≥ (%): 12.0
Impact strength, AKv ≥ J: -
Hardness HBS: 197 min.
Hardness HBS: 197 min.
PRODUCT DESCRIPTION
High room and elevated temperature strength.Good creep.
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.Good creep.
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 - quenched and tempered.
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 - quenched and tempered.
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.
PRODUCT PROFILE & DIMENSIONS
Round bar / rod / disc (diameter): 6.0 to 550mm
Square bar / flat bar: 8 to 800mm
Heavy/middle plate via hot rolled: T60 - 450 X W50 - 1000 X L1000 - 5000mm
Sheet steel via cold rolled: T1.5 - 4 X W100 ~ 1000 X L1000 - 2000mm
Forging piece: stepped shafts /other different shapes based on OEM.
Round bar / rod / disc (diameter): 6.0 to 550mm
Square bar / flat bar: 8 to 800mm
Heavy/middle plate via hot rolled: T60 - 450 X W50 - 1000 X L1000 - 5000mm
Sheet steel via cold rolled: T1.5 - 4 X W100 ~ 1000 X L1000 - 2000mm
Forging piece: stepped shafts /other different shapes based on OEM.
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
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