Iron Alloys

Ductile Irons

ASTM Standard
Nominal Hardness
 

Ductile Iron

A536 Grade 60-40-18 150 - 180 BHN Grade with maximum ductility and low temperature toughness. Excellent machinability.
A536 Grade 65-45-12 180 - 210 BHN  
A536 Grade 80-55-06 210 - 250 BHN High strength, good wear resistance, moderate ductility and impact resistance. Good machinability.
A536 Grade 100-70-03 250 - 300 BHN  
A536 Grade 120-90-02 300 - 360 BHN Very high strength and wear resistance. Fair machinability.

Ductile Ni-Resist (Austenitic)
A439 Type D-2 139 - 202 BHN Used when resistance to heat, corrosion, oxidation and wear are required. Good strength and dimensional stability at elevated temperatures.
Other grades available upon request.

Austempered Ductile Iron (ADI)
Grade 125/80/10 269 - 321 BHN Great strength, excellent dynamic properties.
Grade 150/100/7 302 - 363 BHN All ADI grades are stronger per unit of weight than Aluminum, as wear resistant
Grade 175/125/4 341 - 444 BHN As strong as steel, and easier to machine than free-machining steel.
Grade 200/155/1 388 - 477 BHN  
Grade 230/185/0 444 - 555 BHN Even higher strength, excellent wear resistance.

Gray Irons
ASTM Standard
Nominal Hardness
  

Gray Iron
A48 Class 20 110 - 140 BHN Excellent machinability and damping capacity. Good resistance to thermal shock.
A48 Class 30 150 - 180 BHN

 
A48 Class 40 220 - 250 BHN

Wear resistance increases, strength increases, finer finish after machining.

Heat Resistant Gray Iron

 
Element(s) Added
  
A319 Class I Type A Chromium Low tensile strengths, very good resistance to thermal shock.
A319 Class II Type A Chromium Moderate tensile strengths, average resistance to thermal shock.
A319 Class III Type B/C Chromium High tensile strengths, average resistance to thermal shock.
A319 II-B Plus Mo Cr & Moly Creep rupture properties greatly improved (at elevated temperatures).
A319 II-B Plus Cu Cr & Copper Most effective in retarding growth.
Other grades available upon request.

Abrasion Resistant & High Chrome Irons

Engineered to guarantee through hardness in sections up to 12 inches thick.

Nihard
A532 Class I Type A 550 BHN Microstructure is largely tempered Martensite, with less than 25% carbides by volume. Least abrasion resistant grade of alloyed white iron.

20 - 1
A532 Class II Type D >650 BHN (>820 LD) Microstructure is 30% by volume Carbides; remainder is Martensite.

Pliant25
A532 Class III Type A <300 BHN (Softened) Microstructure is 25% by volume Carbides. Used when drilling and tapping the casting is neccessary.
  >600 BHN (Hardened) Casting can be supplied in softened condition and hardened after machining.

Granite25
A 532 Class III Type A >650 BHN (>820 LD) Microstructure is 35% by volume Carbides; remainder is Martensite. Most common 25% Cr alloy.

Diamond25
A 532 Class III Type A >650 BHN (>820 LD) Microstructure is 40% by volume Carbides; remainder is Martensite. The hardest, most abrasion resistant white iron on the market.
Other grades available upon request.