锅炉用钢标准ASTM A299

　　Boiler steel standard ASTM A299 is an ASTM specification which cover manganese-silicon carbon steel plates for use welded boilers and other pressure vessels. Below are difference between A299Gr.A steel and A299Gr.B boiler steel in chemical composition and mechanical properties.

A299Gr。一个和A299Gr。B锅炉钢的化学成分标准ASTM A299

钢的等级	C	如果	锰	P	年代
A299甲级	0.28 - -0.30	0.13 - -0.45	0.84 - -1.62	0.035	0.035
A299乙级	0.28 - -0.30	0.13 - -0.45	0.84 - -1.62	0.035	0.035

A299Gr。一个和A299Gr。B锅炉钢的机械性能符合ASTM A299标准

A299甲级	50 t≦	275 - 290	515 - 655	19
	50 < t≦200	275 - 290	515 - 655	19
A299乙级	50 t≦	310 - 325	550 - 690	19
	50 < t≦200	310 - 325	550 - 690	19

　　ASTM A299 Steel Plates Application

　　A299Gr.A plates and A299Gr.B sheets are widely used for manufacturing pressure and boiler equipments. Plates of ASTM A299 standard under this thickness of 50 mm are normally supplied in as-rolled condition. Plates may be ordered normalized or stress relieved, or both. Plates over 50 mm in thickness shall be normalized.

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