Ductile Iron ASTM A536 65-45-12

Designations: A536 65-45-12 · UNS F33100 · SAE J434 D4512 · EN-GJS-450-10ASTM A536 Grade 65-45-12 is a mainly ferritic ductile iron that combines good strength with 12% minimum elongation and very good machinability. The grade name gives its minimums: 65 ksi tensile, 45 ksi yield and 12% elongation. It is used for valve and pump bodies, pipe fittings, brackets and general machinery parts. Kormax casts A536 65-45-12 to order for customers in the United States and Canada.

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Chemical Composition

Ductile Iron ASTM A536 65-45-12 — chemical composition, % by weight
Element	Symbol	Range / limit %
Carbon	C	3.6–3.9
Silicon	Si	2.3–2.9
Manganese	Mn	0.10–0.40
Magnesium	Mg	0.035–0.055
Copper	Cu	0.05 max
Chromium	Cr	0.03–0.07
Phosphorus	P	0.08 max
Sulfur	S	0.025 max
Iron	Fe	Balance

Mechanical Properties

Ductile Iron ASTM A536 65-45-12 — mechanical properties
Property	Metric	Imperial
Tensile Strength, min	448 MPa	65 ksi
Yield Strength, min	310 MPa	45 ksi
Elongation, min	12%	12%
Hardness (Brinell), typical	156–217 HB	156–217 HB

ASTM A536 specifies tensile, yield and elongation; the grade name gives them. Hardness is typical (SAE J434 D4512 range). Composition is Kormax typical foundry practice; ASTM A536 does not specify chemistry.

Comparable and Related Specifications

The standards and grades below may have similar composition, properties or applications, but they should not be treated as direct equivalents without review. Chemistry, heat treatment, toughness requirements and testing provisions can differ between standards.