1.6749
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Quenched and tempered Steel 1.6749 high temperature alloy steel is used for larger preshaped components in turbine and generator installations, shafts and discs.
MATERIAL TECHNICAL DATASHEET - Grade 1.6749
Material Category: Hardened and tempered steel
Material Specification - SEW 555 or by agreement
Melting process way - EF + Consumable electrode remelted
HS code for Customs: 7228 4000 / 7228 5000 / 7228 6000
Main Chemical composition (mass weight - %)
Carbon, C (％): 0.20 ~ 0.26
Silicon, Si (％): ≤ 0.35
Manganese, Mn (％): 0.50 ~ 0.80
Phosphorus, P (％) ≤: 0.020
Sulfur, S (％) ≤: 0.010
Chromium, Cr (％): 1.70 ~ 2.00
Molybdenum, Mo (％): 0.60 ~ 0.80
Nickel, Ni (％): 0.90 ~ 1.20
Vanadium, V (％): -
Ferrum, Fe (％): balance.
Material Category: Hardened and tempered steel
Material Specification - SEW 555 or by agreement
Melting process way - EF + Consumable electrode remelted
HS code for Customs: 7228 4000 / 7228 5000 / 7228 6000
Main Chemical composition (mass weight - %)
Carbon, C (％): 0.20 ~ 0.26
Silicon, Si (％): ≤ 0.35
Manganese, Mn (％): 0.50 ~ 0.80
Phosphorus, P (％) ≤: 0.020
Sulfur, S (％) ≤: 0.010
Chromium, Cr (％): 1.70 ~ 2.00
Molybdenum, Mo (％): 0.60 ~ 0.80
Nickel, Ni (％): 0.90 ~ 1.20
Vanadium, V (％): -
Ferrum, Fe (％): balance.
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Hot working temperature /℃: 1050 ~ 850
Hardness after annealing ≤HBS: 269
Tensile strength, |σb≥/MPa: 750 ~ 900
Yield strength, |σs≥/MPa: 600
Elongation, |δ5≥/(%): 12.0
Reduction of area, |ψ≥/(%): 40.0
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.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered.
PRODUCT PROFILE & DIMENSIONS
Round bar / Disc (diameter): 5.5mm to 850mm
Square bar / Flat bar: 6mm to 600mm
Steel sheet: thickness 1.0 ~ 4.0mm, width 10 ~ 1000mm X length 1000/2000mm - Standard size
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
If you meet further on any technical enquiry. pleased to email or call our resident team of qualified production engineers. E-mail: sales@ccsteels.com.
Hot working temperature /℃: 1050 ~ 850
Hardness after annealing ≤HBS: 269
Tensile strength, |σb≥/MPa: 750 ~ 900
Yield strength, |σs≥/MPa: 600
Elongation, |δ5≥/(%): 12.0
Reduction of area, |ψ≥/(%): 40.0
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.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered.
PRODUCT PROFILE & DIMENSIONS
Round bar / Disc (diameter): 5.5mm to 850mm
Square bar / Flat bar: 6mm to 600mm
Steel sheet: thickness 1.0 ~ 4.0mm, width 10 ~ 1000mm X length 1000/2000mm - Standard size
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
If you meet further on any technical enquiry. pleased to email or call our resident team of qualified production engineers. E-mail: sales@ccsteels.com.
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