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Steel Grade: BSt420S| Material No.: 1.0428

CHEMICAL COMPOSITION(BSt420S):
C(％)≤:    0.22
Si(％)≤:    0.6
Mn(％)≤:    -
P(％)≤:    0.05
S(％)≤:    0.05
Cr(％):    -
Ni(％):    -
N(％):    0.012
Cu(％):    -
Other(％):    -
MECHANICAL PROPERTIES (BSt420S):  
Yield Strength|σs≥Mpa    σ0.2≥420Mpa

Remark(BSt420S): 
1, The sheet and belt steel need to test yield strength for crosswise.
2, The thickness can be reached 150mm.
3, When the thickness is more than 70mm, the flexual center diameter is 0.5a.
4, It is European standard steel grade for EN 10155(1993) in parenthesis.
5, L-->Length, T-->Crosswise.
6, a-->Testing sample thickness.
 
Introduction structural steel (BSt420S) 
Structural steel is a steel that conforms to a specific strength and formability grade. The formability is expressed as the elongation at the end of the tensile test. Structural steel is generally used for bearing and other purposes. In these uses, the strength of steel is an important design standard. 
Most steels used throughout Europe are specified to comply with the European standard EN 10025. However, many national standards also remain in force.  
Typical grades are described as 'S275J2' or 'S355K2W'. In these examples, 'S' denotes structural rather than engineering steel; 275 or 355 denotes the yield strength in newtons per square millimetre or the equivalent megapascals; J2 or K2 denotes the materials toughness by reference to Charpy impact test values; and the 'W' denotes weathering steel. Further letters can be used to designate fine grain steel ('N' or 'NL'); quenched and tempered steel ('Q' or 'QL'); and thermomechanically rolled steel ('M' or 'ML').  
Application(BSt420S) 
Structural steel is a category of steel used for making construction materials in a variety of shapes. Many structural steel shapes take the form of an elongated beam having a profile of a specific cross section. Structural steel shapes, sizes, chemical composition, mechanical properties such as strengths, storage practices, etc., are regulated by standards in most industrialized countries.  

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