GRAY IRON	DUCTILE IRON	LOW CARBON STEEL CASTING	LOW ALLOY STEEL CASTING
1	Degradation of tensile strength at 750°F	<15%	<15%	<15%	<15%
2	Degradation of yield strength at 750°F	-	<15%	<15%	<15%
3	Degradation of elongation strength at 750°F	-	<15%	<15%	<15%
4	Degradation of resistance at 1100°F	<50%	<50%	>90%	>50%
5	Degradation of resistance at 1300°F	>75%	>75%	>95%	>80%
6	QI	< 500	38000	55000	50000/85000