S118
2025-08-15 14:04:00 Origin： Remark：0 Click：
Aircraft "S" series alloy structural steel S118 round bar, flat bar, sheet - steelmaking, Electroslag melting, Ultrasonic test, hot forging, rolling, heat treated
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
MATERIAL DESIGNATION - BS S118
MATERIAL CATEGORY: Aircraft "S" series alloy structural steel
TYPE OF STEEL: Cr-Ni-Mo Steel
CHEMICAL COMPOSITIONS (mass weight %)
Carbon, C (％): 0.35 ~ 0.45
Silicon, Si (％): 0.10 ~ 0.35
Manganese, Mn (％): 0.40 ~ 0.80
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 0.90 ~ 1.40
Silicon, Si (％): 0.10 ~ 0.35
Manganese, Mn (％): 0.40 ~ 0.80
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 0.90 ~ 1.40
Nickel, Ni (%): 1.20 ~ 1.60
Molybdenum, Mo (％): 0.10 ~ 0.20
Molybdenum, Mo (％): 0.10 ~ 0.20
Equal to: EN 110
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Condition: Heat treatment
Tensile strength, σb ≥ MPa: 980
Yield strength, σs ≥ MPa: 835
Elongation, δ5 ≥ (%): 12.0
Yield strength, σs ≥ MPa: 835
Elongation, δ5 ≥ (%): 12.0
AKV ≥ J: 78
Hardness HBS: 269 Min.
Hardness HBS: 269 Min.
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.
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 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
PRODUCT PROFILE / DIMENSIONS
Round bar / rod (diameter): 5.5 to 400mm
Square bar / flat bar: 8 to 600mm
Length: random length or based on the customer's special requirement.
Round bar / rod (diameter): 5.5 to 400mm
Square bar / flat bar: 8 to 600mm
Length: random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T60 - 400 X W60 - 1000mm X L1000 - 5000mm
Sheet steel via cold rolled: T0.5 - 6 X W10 - 1000 X L1000 - 2000mm
Steel strip via cold rolled: T0.5 - 3 X W5 - 200 X L (or in coil form)
Forging piece: stepped shafts, other different shapes based on OEM.
Sheet steel via cold rolled: T0.5 - 6 X W10 - 1000 X L1000 - 2000mm
Steel strip via cold rolled: T0.5 - 3 X W5 - 200 X L (or in coil form)
Forging piece: stepped shafts, other different shapes based on OEM.
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.
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.
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
Hot search：S118
