Our company is located in the production base of China Steel, we can provide a variety of special steel products, such as QStE420TM Hot-rolled or QStE420TM forged round and QStE420TM square steel, QStE420TM seamless steel tube, etc. we have QStE420TM datasheet, QStE420TM chemical composition, QStE420TM datasheet, QStE420TM heat treatment and QStE420TM mechanical properties.

Steel Grade: QStE420TM | Material No: 1.0980
We offer guidance on steel equivalent grades and hard to find steel specifications.

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 :—

Remark(QStE420TM):
①, The European standard is come out from EN 10194-1995.
②, The steel should be added enough Al, Nb, Ti, V and fine grain in order to solidify N.
③, When the thickness is exceed 4mm, the composition of C is lower than ≤0.12％.
④, The upper limit of Mn composition can be more than 0.50％.
⑤, The upper limit of Mn composition can be more than 0.40％.
⑥, The upper limit of Mn composition can be more than 0.30％.
⑦, The V+Nb+Ti should be lower than 0.22％.
⑧, d-->Flexural Center Dia, a--> thickness of test of sample.
⑨, The time of heat preservation is 30min.
⑩,The time of heat preservation should be 2min/mm.
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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