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Steel Grade: EStE255(S255NL1) | Material No.: 1.1103

CHEMICAL COMPOSITION(1.1103):
C(％)≤:       0.16
Si(％) :       
Mn(％)≤:       0.50～1.30
P(％)≤:        0.025
S(％)≤:        0.015
N(％)≤:        —
Al(％) :        0.02
Cr(％)≤:        0.30②
Cu(％)≤:        0.2
Mo(％)≤:        0.08②
Ni(％)≤:       —
Nb(％)≤:       —
Ti(％)≤:       —
V(％) :        —
Nb+Ti+V(％)⑥:        0.05

MECHANICAL PROPERTIES (1.1103):
Tensile Strength|σb/Mpa(≤70mm):       360～480
Normal Temp Yield Strength|σ/Mpa (≤16mm):       225
Extensibility|δ5≥(％):      25
Flexual Center Dia Cold-bend Test(180℃/T⑥⑦):      1a
Sample Direction L/T⑧⑨ :       L/T
Ballistic|αkv≥(J/cm^2)( +20℃):       100/80

Remark(1.1103):   
①, It is European standard steel grade in parenthesis, it have been revised by DIN EN 10028-5+6(1997) and DIN EN 10113(1993).
②, The balance of Cr+Cu+Mo is under 0.45％.
③, When the steel have Cu element, then the Cu is under 0.70％.
④, When the steel have Ni element, then the Ni is under 0.85％.
⑤, When the steel have Ti element, then the Ti is under 0.20％.
⑥, a-->Testing sample thickness.
⑦, When the thickness is more than 70mm, the flexual center diameter is 0.5a.
⑧, The testing sample is V form according to ISO.
⑨, This result apply to the thickness which is from 10mm to 150mm, and it is average value of three samples.
Please check the PDF for 1.1103 

Introduction Low Alloy Structural Steel (1.1103) 
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(1.1103) 
Mainly used in the manufacture of Bridges, ships, vehicles, boiler, pressure vessel, oil pipelines, large steel structure, etc.

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