21CrMoV5-11
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RAW MATERIAL SPECIFICATIONS - 21CrMoV5-11

MATERIAL CATEGORY - high temperature 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.
Final heat treatment - quenched and tempered. 

MATERIAL SPECIFICATIONS - DIN EN 10028-2 (2003), DIN 17755 (1983)

CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.17 ~ 0.25
Silicon, Si (％): 0.30 ~ 0.60
Manganese, Mn (％): 0.30 ~ 0.60
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.035
Chromium, Cr (％): 1.20 ~ 1.50
Molybdenum, Mo (％): 1.00 ~ 1.20
Nickel, Ni (％): ≤ 0.60
Vanadium, V (％): 0.25 ~ 0.35

MECHANICAL PROPERTIES UNDER ROOM TEMP.
Hot working temperature /℃: 1100～850
Heat treatment temperature /℃|annealing / normalizing: 650~740
Heat treatment temperature /℃|quenching: 900~950  Oil or Air
Heat treatment temperature /℃|tempering: 680~740
HBW: 205~250
Tensile strength, (≥)|σb/MPa: 690～830
Yield strength, (≥)|σs/MPa: 540
Elongation, (≥)|δ5(%): 16.0
Impact, (≥)|AKV/J: 55       
Heat treatment temperature /℃|annealing / normalizing: 650~740
Heat treatment temperature /℃|quenching: 900~950  Oil or Air
Heat treatment temperature /℃|tempering: 680~740
HBW: 205~250
Tensile strength, (≥)|σb/MPa: 690～830
Yield strength, (≥)|σs/MPa: 540
Elongation, (≥)|δ5(%): 16.0
Impact, (≥)|AKV/J: 55       
Heat treatment temperature /℃|annealing / normalizing: 650~740
Heat treatment temperature /℃|quenching: 900~950  Oil or Air
Heat treatment temperature /℃|tempering: 680~740
HBW: 205~250
Tensile strength, (≥)|σb/MPa: 690～830
Yield strength, (≥)|σs/MPa: 540
Elongation, (≥)|δ5(%): 16.0
Impact, (≥)|AKV/J: 55               

MECHANICAL PROPERTY UNDER HIGH TEMPERATURE
Yield strength σ0.2≥/MPa|200℃: 510
Yield strength σ0.2≥/MPa|300℃: 481
Yield strength σ0.2≥/MPa|350℃: 461
Yield strength σ0.2≥/MPa|400℃: 431
Yield strength σ0.2≥/MPa|450℃: 402
Yield strength σ0.2≥/MPa|500℃: 73

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. 
Mechanical gears, gear shaft, main axis, valve rod.
Mechanical parts - connecting rod, bolt and nut.
Multidiameter shaft and pressure vessel.

PROFILE & DIMENSIONS  
Round bar / Disc (diameter): 5.5mm to 550mm
Square bar / Flat bar: 10mm to 700mm
Plate / Sheet steel / Steel strip: 0.5mm to 400mm
Width: 8mm to 1000mm
Length: random length or based on the customer's special requirement.
Forged steel shape: stepped shafts, other different shapes based on OEM.

TECHNICAL SALES ASSISTANCE & SERVICE
If you meet further on any technical enquiry, pleased to EMAIL ( sales@ccsteels.com ) our resident team of qualified production engineers.