ADI 1600 grade isothermal hardened ductile iron (ADI) pipe fittings belong to the highest strength grade of ASTM A897: 

Compared with ordinary ductile iron or low-alloy cast steel, ADI 1600 pipe fittings can reduce weight by 8-10% with the same wall thickness, while also possessing: 

1. High wear resistance—hardness comparable to 58 HRC tempered steel, with a 2-3 times longer service life; 

2. High fatigue life—bending fatigue limit of 500 MPa, suitable for 0-bar alternating internal pressure conditions; 

3. Vibration and noise reduction—the graphite spheroids + austenitic matrix absorb vibration 40% faster than steel, reducing pump station noise by 3-5 dB; 

4. Low-temperature toughness—impact energy remains above 35 J at -40℃, suitable for outdoor water supply and mine tailings pipelines; 

5. Cost Advantage – Near-net-shape casting + isothermal quenching results in a 15-25% lower unit cost for mass production compared to forged steel parts of the same specifications, and a 30% reduction in machining requirements. 

Therefore, ADI 1600 pipe fittings, tees, elbows, etc., are particularly suitable for high-pressure pumping stations, mine slurry transportation, large sprinkler irrigation machines, and long-distance water supply pipelines in cold regions. They can increase the rated pressure rating by 1.5-2 times without increasing wall thickness, significantly extending maintenance cycles.

ADI 1600 -1 Material Properties: