St52 3N steel sheet is one mainly of Carbon and low alloy steel, Because of adding Cr, Cu and Ni, oxide layer forms stick firmly on the work piece surface. This oxide layer prevents further corrosion of the steel. St52 3N steel plate mainly for use in welded, riveted and screwed structural components, They are not intended for heat treatment, apart from stress-relieving heat treatment and normalizing. Can be worked for statically and dynamically stressed constructions.
St52 3N Chemical composition(%):
C:≤ 0.2
Mn:≤ 1.6
S :≤0.035
P :≤0.035
Si : 0.15 -0.5
N:≤ 0.09
Nb:0.02-0.04
Al:≥0.02
St52 3N Mechanical properties:
Tensile Strength σb(MPa) :510(thickness between 10-100mm)
Yield Strength σ0.2(MPa): ≥350 (thickness between 10-100mm)
Elongationδ5(%):≥22(thickness between 10-100mm)
ST52-3N Special Steel Technology:
1. machinable
(1) Thermal processing performance, refers to the thermoplastic, processing temperature range, etc.
(2) Cold processing performance, refers to cutting, grinding, polishing, cold and other processing performance.
2. Hardenability and Hardening
3. Quenching temperature and heat treatment deformation
4. Oxidation, decarbonization sensitivity
