| GRAY IRON: Contains flake graphite in matrix structures that range from all pearlite to pearlite plus ferrite. The matrix structure will influence machinability, strength, hardness and wear characteristics. In general, a fully pearlitic matrix will have the best mechanical properties and will be readily machinable. Bars containing ferrite in the matrix will be easier to machine but will be lower in strength and wear resistance.DUCTILE IRON: Contains nodular graphite in a matrix of pearlite and ferrite. The spheroidal shaped graphite maximizes the strength in cast iron. The ratio of ferrite to pearlite in the matrix varies in each of the three grades in order to produce the required tensile and yield strengths and elongation properties. The nodular graphite provides the same free machining benefits as lead (steel) without the machining and waste disposal problems.OD DIMENSION TOLERANCE: OD tolerance is on the plus side. |
| AVAILABLE SIZES |
| Round | = Thru 20" |
| Tube | = .500" ID x 3" OD Thru 7" ID x 9" OD |
| Rectangle | = 1" x 2" Thru 7.500" x 20.500" |
| Square | = 3" Thru 10" |
| GRADE | APPLICATIONS | EXAMPLES |
| G1A GRAY IRON |
Moderate strength, increased machinability, excellent damping | Pump gears, air compressors, screws |
| G2 CLASS 40 GRAY IRON |
Moderate strength, good wear as-cast, excellent damping | Balance shaft gears, lightly loaded drive gears, large printing press gears |
| G2 HEAT TREATED GRAY IRON |
Best wear in a non-alloyed ferrous metal, moderate strength, tooth sections >.250", good damping | Same as above, better wear resistance |
| G2 ALLOYED GRAY IRON |
Improved wear over class 40 grade or quench and tempered class 40 grade; increased wear resistance with higher chrome levels | Most automotive gray iron gears |
| 65-45-1 DUCTILE IRON |
Good machinability, size control after heat treatment | Balance shaft gears, rotary screw compressor gears, non-contacting pump gears |
| 80-55-06 DUCTILE IRON |
Higher strength, higher hardness, increased wear; good heat treat response when flame or induction hardening | Balance shaft gears, printing press gears, rotary screw compressors, pump gears |
| 100-70-02 DUCTILE IRON |
Good wear resistance without heat treating | Balance shaft gears, printing press gears, rotary screw compressors, pump gears |
| AUSTEMPERED DUCTILE IRON | Tensile, impact fatigue strengths, wear resistance | Highly loaded gears, transmission gears, speed reducers |