MATERIAL DATA SHEET - Grade DIN 1.1169
MATERIAL CATEGORY: Low temperature steel
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 - heat treatment / QT
MATERIAL SPECIFICATIONS - DIN EN 10028-2 (2003), DIN 17755 (1983)
CHEMICAL COMPOSITION (mass weight %)
C (％): 0.17 ~ 0.23
Si (％): 0.30 ~ 0.60
Mn (％): 1.30 ~ 1.60
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): -
Ni (％): -
V (％): -
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working temperature /℃: 1100～850
Heat treatment temperature /℃|annealing / normalizing : 860~890
Heat treatment temperature /℃|quenching: 860~890 water
Heat treatment temperature /℃|tempering: 500~850
Normal temperature and low temperature | Condition: room temperature
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, Pressure vessel.
Round bar / Wire rod (Diameter): 5.5mm to 400mm
Square bar / Flat bar: 10mm to 600mm
Width: 8mm to 1000mm
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