Seamless steel tube 1. standard of GB3087-1999 2. Grade of 10 and 20 3. specification of 12-530*2-40

             our seamless steel tubes/pipes are made into

       ♥superheated steam pipe,

       ♥boiling water pipe for kinds of low & medium pressure boiler;

       ♥flue tube,

       ♥arch tube for locomotive boiler.  

Mechanical properties:

Standard	Grade	Tensile strength   (MPa)	Yield strength (MPa)	Elongation (%)
GB3087	10	335-475	≥195	≥24
	20	410-550	≥245	≥20

Chemical composition:

Standard	Grade	Chemical composition (%)
		C	Si	Mn	P	S	Cr	Cu	Ni
GB3087	10	0.07-0.14	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.15	≤0.25	≤0.25
	20	0.17-0.24	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25

 

Low/Medium-pressure boilers seamless steel tube