S11 datasheet,S11 chemical,S11 heat treatment

S11
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Specification S11 aircraft, S11 datasheet, S11 Chemical, 4S11 Ring forging, Bar - steelmaking, Electroslag melting, Blooming, Ultrasonic test, hot forging, Rolling, Heat treatment, Straightened, Ultrasonic test, Cold working, Machined. We also possess advanced precision machining equipments for further processing. Please contact with us for detailed enquiry by today!
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TECHNICAL SPECIFICATION DATASHEET - BS S11
MATERIAL CATEGORY: Aircraft "S" series alloy structural steel
CHEMICAL COMPOSITION (WEIGHT %)     
C (%):     0.25 ~ 0.35
Si (%):    ≤ 0.30
Mn (%):   0.45 ~ 0.70
P (%)≤:   0.025
S (%)≤:   0.020
Cr (%):    0.50 ~ 1.00
Ni (%):    2.75 ~ 3.75
Mo (%):   ≤ 0.65
Other (%): W ≤ 1.00, V ≤ 0.25
Equal to: EN 23
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Condition: quenched and tempered
Tensile strength,  σb≥/MPa: 850~1000
Yield strength,  σs≥/MPa: 735
Elongation,  δ5≥(%): 20.0
Impact, AKV≥/J:  -
Annealed hardness HBS: 255 ~ 295
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.
Proven performance in long-term service.
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, or bright annealing specially.
Final heat treatment - 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, seamless pipe
PRODUCT PROFILE & DIMENSIONS
Round bar / Wire rod (Diameter): 5.5mm to 450mm
Square bar / Flat bar: 3mm to 1200mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T60 - 400mm X W60 - 1000mm X L1000 - 5000mm
Sheet steel via cold rolled: T0.5 - 6mm X W100 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /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. - Email: 
sales@ccsteels.com 

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