Iron

CL/30
Material: Class 30C - Close Grain Gray Iron (minimum 30,000 PSI Tensile Strength)        
Characteristics: Close grain, high tensile strength and intermediate hardness in heavy sections.

CL/40
Material: ASTM A48 - 94a Class 40C - Close Grain Gray Iron (minimum 40,000 PSI Tensile Strength)
Characteristics: Close grain, high tensile strength and intermediate hardness in heavy sections.

CL/45
Material: ASTM A48-94a Class 45c - Close Grain Gray Iron (minimum 45,000 PSI Tensile Strength)
Characteristics: Close grain, high tensile strength and intermediate hardness in heavy sections.

CL/50
Material: ASTM A48-94a Class 50c - Close Grain Gray Iron (minimum 50,000 PSI Tensile Strength)    
Characteristics: Close grain, high tensile strength and intermediate hardness in heavy sections.