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100-70-03 Ductile Iron offered by Dura-Bar Metal Services #

Ductile Iron 100-70-03

Dura-Bar 100-70-03 ductile iron contains nodular graphite in a matrix of pearlite with small amounts of ferrite. The pearlitic structure maximizes strength and wear characteristics in a non-alloyed as-cast ductile iron. This specification is similar to ASTM A536 100-70-03.


Depiction of Dura-Bar microstructure

100x, etched in 5% Nitol Center view of Dura-Bar 100-70-03 microstructure

100x, etched in 5% Nitol Edge view of Dura-Bar 100-70-03 microstructure

The microstructure consists of Type I & Type II nodular graphite as defined in ASTM A247. The matrix is highly pearlite with small amounts of ferrite. The "rim" will have a higher nodule count and contain slightly higher ferrite concentration when compared to the center. Chill carbides will be less than 5% in any field at 100x and will be well dispersed.

Chemical Composition of Pearlitic Ductile Iron
C% Si% Mn% S% P%
3.50-3.90. 2.25-3.00 0.15-0.35 0.025 max 0.05 max

Typical Uses

Fluid Power:
Cylinder blocks, Gerotors, Glands, Manifolds, Pistons, Rotors, Valves
Barrell Rollers, Bushings, Chain Sheave Rollers, Chuck Bodies, Die Blocks, Flywheels, Gear Racks, Gears, Housings, Pile Drivers, Pulleys, Rams, Rotary Tables
Port Plate
Power Transmission:
Gears, Pulleys
Pump and Compressor:
Gears, Housings, Liners, Pistons, Rotors
Steel Mill:
Guide Rolls, Pinch Rolls, Runout Table Rolls
Camshafts, Carriers, Gears, Pulleys, Rail Spacers

Grade Properties Pearlitic Ductile Iron

Tensile Strength (psi) 100,000
Yield Strength (psi) 70,000
Elongation (%) 3
Machinabilty Rating (1212=100%) 75%
Hardness (BHN) (AVG) 279
Relative Wear Resistance Excellent
Heat-Treat Response (Rc) 55-60
Speed (sfm)
Feed (ipr) Depth of
Cut (inches)
Rough Turn (OD & ID) 450 - 750 0.008 - 0.022 0.0100 - 0.175
Finish Turn (OD & ID) 800 - 1,000 0.006 - 0.010 0.010 - 0.050
Drilling/Milling (indexable) 400 - 600 0.004 - 0.012  
(solid carbide)
250 - 350 0.003 - 0.012  
Grooving (OD & ID) 400 - 800 0.002 - 0.007