Classification: The main materials of the grate are heat-resistant iron, heat-resistant high-chromium cast iron, ordinary cast steel, high-chromium-nickel heat-resistant cast steel, etc.

 

The chemical composition (melting analysis) should meet the requirements of Table 1.

 

Type	Grade	Chemical components
		C	Si	Mn	S	P	Cr	Ni	Mo	V	Ti	RE	Mg	Al
Heat-resistant ductile iron grate bar	QTRSi5.5	5.0-3.2	5.0-6.0	≦0.70	≦0.03	≦0.10	-	-	-	-	-	0.02-0.05	0.03-0.08	-
	QTRAl4Si4	2.5-3.0	3.5-4.5	≦0.50	≦0.02	≦0.10	-	-	-	-	-	0.02-0.05	0.03-0.06	3.5-4.5
	QTRAl4Si4Mo	2.5-3.0	3.5-4.5	≦0.50	≦0.02	≦0.10	-	-	0.15-0.50	-	-	0.02-0.05	0.03-0.06	3.5-4.5
	QTRAl5Si5	2.3-2.8	4.5-5.2	≦0.50	≦0.02	≦0.10	-	-	-	-	-	0.02-0.05	0.03-0.06	5.0-5.8
Heat-resistant high chromium cast iron grate bars	BTRCr12Al	0.9-1.2	1.0-1.4	0.50-1.00	≦0.04	≦0.06	10.0-12.0	-	-	-	-	-	-	0.5-1.2
	BTRCr16	1.6-2.4	1.5-2.2	≦1.0	≦0.05	≦0.10	15.0-18.0	-	-	-	-	-	-	-
	BTRCr16VTi	1.6-2.2	1.3-2.0	0.50-1.00	≦0.04	≦0.06	15.0-18.0	-	-	0.1-0.4	0.2	-	-	-
	BTRCr26	0.8-1.6	0.6-1.6	0.70-1.20	≦0.04	≦0.04	24.0-28.0	-	-	-	-	-	-	-
	BTRCr26Ni	1.4-2.0	1.0-1.4	0.70-1.00	<0.03	<0.03	25.0-28.0	0.8-1.2	-	-	-	-	-	-

 Table 1 Chemical composition of grate bars

 

 

cast iron grate bars