JIANGSU MITTEL STEEL INDUSTRIAL LIMITED |
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CHEMICAL COMPOSITION(QStE420TM): C(%):0.12 Si(%) : 0.50④ Mn(%) : 1.6 P(%)≤:0.025 S(%)≤: 0.015 Ti(%)≤:0.15 V(%):0.2 Other(%):Al≤0.015%, Nb≤0.09% | MECHANICAL PROPERTIES(QStE420TM): Tensile Strength σb(T)/Mpa:480~620 Yield Strength σs(T)/MPa≥:420 Extensibility δ5(T)(%)≥:21 Ballistic AKV/J(-20℃)≥:28 Flexural Center Dia Cold-bend Test(180℃/T) :d=0.5a Annealing/℃⑨ :530~580 Normalizing/℃⑩ :— |
Introduction Structural Steel(QStE420TM)
Structural steel is mainly used in the manufacture of engineering
components and machine parts, such as using steel .
Classification(QStE420TM)
Steel construction: to build the boiler, ships, Bridges, factories
and other steel used in construction, this kind of steel, usually
after welding construction, so generally no more than 0.25% carbon,
low carbon steel, mostly used in the condition of hot rolling or
normalizing. Mechanical steel: steel used in the manufacture of
machines or mechanical parts, this kind of steel carburizing often
passes or quenched and tempered treatment before use.Used to deal
with the carburizing steel is refers to the carbon content in 0.1%
~ 0.3% of low carbon steel.Used to deal with the quenched and
tempered steel, is refers to the carbon content in 0.3% ~ 0.3% of
medium carbon steel.Mechanical steel include spring steel and
bearing steel, however, because the carbon content is higher, have
special USES, so often separate it into a class.
Application of Structural Steel(QStE420TM)
Building bar; Agricultural machinery; Shipbuilding steel; Boiler
steel; The compressor crankshaft, connecting rod, piston rod, etc.
Bearing steel; Bolts, nuts, washers, Gear parts; Railway vehicle;
The oil derrick; Pressure vessel; The boiler steam drum; Factory
building structure; Rolling stock; Oil tank, oil tank; Automobile
vertical and horizontal beam; High pressure blower blade; Turbine,
worm; The important parts; Spiral spring, leaf-spring, etc