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Steel Grade: S700MC| Material No.: 1.8974

CHEMICAL COMPOSITION(1.8974):
C(％)≤:        0.12
Si(％) :        0.6
Mn(％)≤:        2.1
P(％)≤:        0.025
S(％)≤:        0.015
Ti(％)≤:       0.22
V(％) :        —
Other(％):        Al≤0.015％, Nb≤0.09％

MECHANICAL PROPERTIES (1.8974):
Tensile Strength σb(T)/Mpa:      750～950
Yield Strength σs(T)/MPa≥:       700
Extensibility δ5(T)(%)≥:       12
Ballistic AKV/J(-20℃)≥:       28
Flexural Center Dia Cold-bend Test(180℃/T):       d=2.0a
Annealing/℃⑨:       530～580
Normalizing/℃⑩:       —
Remark(1.8974):   
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 Low Alloy Structural Steel (1.8974) 
Low alloy structural steel is to point to in adding a small amount of ordinary carbon steel or trace alloy elements, and make the steel performance change, get more excellent steel than ordinary carbon steel performance, also has special features such as high temperature resistant, resistant to low temperature.Due to the amount of alloy element in this kind of steel to join, this kind of alloy steel belongs to low alloy steel. Low alloy steel including weldability of high strength low alloy structural steel, low alloy weathering steel, steel with low alloy steel, railway with low alloy steel, low alloy steel for mine and he low alloy steel.
Application(1.8974) 
Mainly used in the manufacture of Bridges, ships, vehicles, boiler, pressure vessel, oil pipelines, large steel structure, etc.

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