Chemical composition of the 90 mm thick S355J2 G3+N steel plate

Chemical composition of the 90 mm thick S355J2 G3+N steel plate (wt.%)

Certificate	C	Si	Mn	P	S	Al	Other chemical elements no data
	0.155	0.46	1.20	0.011	0.002	0.034
Our analysis	C	Si	Mn	P	S	Al	Cr	Mo	Ni
	0.156	0.43	1.19	0.013	0.002	0.019	0.14	0.03	0.17
	Cu	Ti	Nb	B	As	Sn	Sb	Bi	Zn
	0.34	0.002	0.02	0.0003	0.014	0.02	0.006	0.0004	0.004

Mechanical properties of the 90 mm thick S355J2 G3+N steel plate

Certificate	Yield str. Ry (N/mm2)	Tensile str. Rm (N/mm2)	Elongat. A5 (%)	Contrac. Z (%)	Imp. tough. (—20 °C) KV300 (J)
Our results	350 / / /	543 / / /	26.6 / / /	/ 34–39 / /	46 – 80a 76 – 95a 6 – 9a 85–120a

As part of the manufacture of a water turbine’s stay ring, during the cooling of a welded T-joint, a brittle fracture formed instantaneously in the vanes made from a 90-mm-thick normalized rolled S355J2 G3+N steel plate. The fracture in the central part of S355J2 G3+N steel plate’s thickness divided the plate into two, almost equally thick, layers. Such a cleavage was found to be the result of high residual tensile stresses acting through S355 J2 G3+N steel plate’s thickness. Due to a large thickness, the stiffness of the welded area was high, and so during cooling no plastic deformation of the plate could occur, which further increased the tendency for brittle fracture of S355 J2 G3+N steel plate. Katalor can supply S355J2 G3+N steel plate, any more question about S355J2 G3+N steel plate, welcome to question katalor.