Gray iron is the earliest and most widely used form of cast iron. It contains flake-shaped graphite dispersed throughout a metal matrix. This interconnected graphite structure gives gray iron its distinctive properties.
Common applications:
Automotive engine components, piston rings, wear rings, cylinder sleeves, gears, machine tool slides, pulleys, and sheaves.
Hualong produces 5 standard grades of gray iron in accordance with QT standards. HB30 and HB 40 grades conform to ASTM A48, class 30 and class 40 respectively:
1 For reference only. Actual tensile strength depends on bar diameter and section size
2 40 ksi/275 Mpa minimum tensile in the midradius of bars < 6″ (155 mm)
3 Hardness range depends on bar size and location. For specific BHN specifications please reference product specifications
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