Brinell Parameters

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Pier Foundry offers all ASTM grades of Gray, Ductile & Austempered Ductile Iron.

Iron Type

Classification &

Specification

Tensile

Strength (psi)

Brinell Hardness

Range (BHN)

Applications

Gray Iron, ASTM A-48 Class 25 25,000 170-229 Small cylinder blocks and heads, pistons, pump bodies, gear boxes, housings.
Class 30 30,000 187-241 Automatic cylinder blocks, heads, liners, fly-wheels, medium duty.
Class 35 35,000 207-255 Truck cylinder blocks and heads, heavy fly wheels and transmission cases.
Class 40 40,000 217-269 Diesel engine castings, liners, cylinders and pistons and heavy parts in general.
Ductile Iron, ASTM A-536 [1] 60-40-18 60,000 170 Max Pressure castings such as valve and pump bodies
65-45-12 65,000 149-207 Machinery castings subject to shock and fatigue loading
80-55-06 80,000 187-255 Crankshafts, gears and rollers
[2] 100-70-03 100,000 241-302 High strength gears, automotive and machine components

Austempered Ductile Iron, A-897

Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
125-80-10 125,000 269-321
150-100-07 150,000 302-363
175-125-07 175,000 341-444
200-155-01 200,000 388-477
230-185-00 230,000 444-555

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Note 1: Must be heat treated to achieve elongation
Note 2: Depending on metal section, heat treating may be required to achieve these specifications.

Contact Pier Foundry for details on special grades or special alloys.