1.7729
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Standard sepcification BS EN 10269 Steel 1.7729 Bolts and nuts, Round bars 1.7729 Shaft DUREHETE 1055 hot forging, hot rolling, heat treatment, cold working.
MATERIAL TECHNICAL DATA SHEET - Grade 1.7729 & Durehete 1055
MATERIAL CATEGORY - BS EN 10269: 1999
PRODUCT DESCRIPTION
Proven performance in long-term service.
Extensive database of long term, high temperature test results.
High room and elevated temperature strength.Good creep and relaxation resistance to 570OC
High notch tolerance.
Thermal expansion coefficients compatible with low alloy steel turbine casing materials.
Extensive database of long term, high temperature test results.
High room and elevated temperature strength.Good creep and relaxation resistance to 570OC
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.
Simplified design for bolting configuration compared with martensitic steels or high nickel alloys.
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
Density (kg/m3): 7.83 at room temp.20 degreee C
MATERIAL SPECIFICATIONS - DIN EN 10269 - 1999
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.17 ~ 0.23
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.35 ~ 0.75
Phosphorus, P (％)≤: 0.020
Sulfur, S (％)≤: 0.020
Chromium, Cr (％): 0.90 ~ 1.20
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.35 ~ 0.75
Phosphorus, P (％)≤: 0.020
Sulfur, S (％)≤: 0.020
Chromium, Cr (％): 0.90 ~ 1.20
Molybdenum, Mo (％): 0.90 ~ 1.10
Nickel, Ni (%): ≤ 0.20
Copper, Cu (％): ≤ 0.20
Copper, Cu (％): ≤ 0.20
Boron, B (%): 0.001 ~ 0.010
Vanadium, V (%): 0.60 ~ 0.80
Titanium, Ti (%): 0.07 ~ 0.15
Other(%): Al 0.015 ~ 0.080, As ≤0.020,.Sn ≤0.020
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Pre-treatment temperature /℃: 660 ~ 700
Heat treatment temperature /℃| annealing: -
Heat treatment temperature /℃| annealing: -
Heat treatment temperature /℃| Normalizing: -
Heat treatment temperature /℃| Quenching: 970 ~ 990 Oil
Heat treatment temperature /℃| Tempering: 680 ~ 720
Hardness after annealing ≤HBS: -
Heat treatment temperature /℃| Quenching: 970 ~ 990 Oil
Heat treatment temperature /℃| Tempering: 680 ~ 720
Hardness after annealing ≤HBS: -
Steel dimension /mm: 100
TS, |σb≥/MPa: 820 ~ 1000
YS, |σs≥/MPa: 660 min.
EL, |δ5≥/(%): 15.0
RA, |ψ≥/(%): 50.0
Impact, |AKV≥/J: 40
TS, |σb≥/MPa: 820 ~ 1000
YS, |σs≥/MPa: 660 min.
EL, |δ5≥/(%): 15.0
RA, |ψ≥/(%): 50.0
Impact, |AKV≥/J: 40
Steel dimension /mm: 100<d<200
Tensile strength, |σb≥/MPa: 820 ~ 1000
Yield strength, |σs≥/MPa: 660 min.
Elongation, |δ5≥/(%): 15.0
Reduction of area, |ψ≥/(%): 50.0
Impact, |AKV≥/J: 27
Tensile strength, |σb≥/MPa: 820 ~ 1000
Yield strength, |σs≥/MPa: 660 min.
Elongation, |δ5≥/(%): 15.0
Reduction of area, |ψ≥/(%): 50.0
Impact, |AKV≥/J: 27
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
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 / Wire rod (Diameter): 5.5mm to 400mm
Square bar / Flat bar: 10mm to 800mm
Square bar / Flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T60 - 400mm X W50 - 1000mm X L1000 ~ 4000mm
Heavy/middle plate via hot rolled: T60 - 400mm X W50 - 1000mm X L1000 ~ 4000mm
Sheet steel via cold rolled: T1.0 - 6mm X W200- 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.5 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: 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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