65-45-12 Ductile Cast Iron Casting Material

Ductile Cast Iron

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Introduction

65-45-12 is a ductile cast iron grade covered by ASTM A536. Typical applications include pump volutes and impellers, steering knuckles, suspension arms, cable drums and power-transmission components.

FieldValue
Designation65-45-12
Material TypeCast Iron
Sub TypeDuctile Cast Iron
Product Formcasting

Manufacturing Process

Sand Casting
Shell Molding Casting
Lost Foam Casting

Equivalent Materials

StandardMaterial Grade
ISO 1083ISO1083/JS/450-10
SAE J434D450
EN 1563EN-GJS-450-10
GB/T 1348QT450-10

Similar Materials

N/A

Reference Standards

StandardStandard TitleEditionSpecificationIdentifier
ASTM A536Standard Specification for Ductile Iron Castings84(1999)e165-45-12—

Physical Properties

N/A

Chemical Composition

No specified chemical composition limits in ASTM A536

Heat Treatment

ASTM A536–84(1999)e1

For information only: properties may be met as cast OR by heat treatment. Guidance only: the standard gives no treatment temperatures, holding times or cooling parameters. Alternative routes are not sequential steps.

Mechanical Properties

Core Mechanical Properties

ASTM A536 — 84(1999)e1 · Table 1 — Normative

PropertyValue
Tensile Strength≥ 65000 psi[1]
Yield Strength≥ 45000 psi[2]
Elongation≥ 12 %[3]
Notes
  • Standard round tensile specimen, 2 in. or 50 mm gauge length; small-size alternatives for 1/2-in. Y-block per Clause 11.1; General-use ductile iron castings; Test coupons represent the same ladle or heat and receive the same thermal treatment as the castings. Coupon size is selected by the purchaser, or by the manufacturer if not specified. No quantitative coupon-to-casting property relationship is prescribed.

ASTM A536 — 84(1999)e1 · Table 1 — Informative

PropertyValue
Tensile Strength≥ 448 MPa[4]
Yield Strength≥ 310 MPa[5]
Notes
  • Standard round tensile specimen, 2 in. or 50 mm gauge length; small-size alternatives for 1/2-in. Y-block per Clause 11.1; General-use ductile iron castings; Test coupons represent the same ladle or heat and receive the same thermal treatment as the castings. Coupon size is selected by the purchaser, or by the manufacturer if not specified. No quantitative coupon-to-casting property relationship is prescribed.

Notes

ASTM A536 · Edition 84(1999)e1

[1] Tensile Strength: Chemical requirements may be agreed between manufacturer and purchaser. Hardness requirements apply only when specified in the contract or purchase order; no numerical hardness limit is prescribed. Special microstructure, pressure-tightness, radiographic, magnetic-particle, dimensional and surface-finish requirements apply only when specified in the contract or purchase order.

[2] Yield Strength: Yield strength is determined at 0.2% offset; another method requires mutual agreement.

[3] Elongation: Elongation gauge length: 2 in. or 50 mm. For a 1/2-in. Y-block use a permitted small-size specimen.

[4] Tensile Strength: The inch-pound values govern. SI values reproduce the printed and are not independent requirements.; Informative reference value; not an acceptance requirement

[5] Yield Strength: Yield strength is determined at 0.2% offset; another method requires mutual agreement.; The inch-pound values govern. SI values reproduce the printed and are not independent requirements.; Informative reference value; not an acceptance requirement

Welding Conditions

N/A

Applications

Ductile cast iron ASTM A536 Grade 65-45-12 is used for pump volutes and impellers, steering knuckles, suspension arms, cable drums and power-transmission components. Other cast components used in this material family include gear and transmission components, hubs, brackets, machine housings and pump-related castings. Applications include agricultural, construction and general industrial machinery.

Lifting, low-temperature and pressure-retaining duties require the relevant component-specific requirements; ordinary family uses do not establish those capabilities.

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Last Updated: November 6, 2026

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