Ductile Iron Castings

Fe Ductile Iron Alloy Castings, Door Hardware Housing, Security/Door/Lock Hardware Industry
Fe Ductile Iron Alloy Castings, Door Hardware Housing, Security/Door/Lock Hardware
Fe Ductile Iron Alloy Castings, Assembly Line Hand Tools Cylinder, Engine Industry
Fe Ductile Iron Alloy Castings, Assembly Line Hand Tools Cylinder, Industrial
Fe Ductile Iron Alloy Castings, Door Hardware Actuating Arm, Security/Door/Lock Hardware Industry
Fe Ductile Iron Alloy Castings, Door Hardware Actuating Arm, Security/Door/Lock Hardware
Fe Ductile Iron Alloy Castings, Door Hardware Housing, Security/Door/Lock Hardware Industry
Fe Ductile Iron Alloy Castings, Door Hardware Housing, Security/Door/Lock Hardware

Ductile iron cast parts have been used in many industries throughout the last several decades, which has significantly contributed to the advancement of modern day machines. When creating ductile iron castings product design engineers can provide a tremendous amount of versatility without sacrificing performance. Ductile iron castings provide the design engineer with the best combination of castability, surface hardening ability, elasticity modulus, corrosion resistance, and strength versus weight ratio. This is all accomplished while having a favorable cost of manufacturing. Additionally, ductile iron gives the design engineer more design freedom and provides the best overall combination of cast and post-cast characteristics.

Ductile Iron Casting Grades

Aero Metals provides many different ductile iron castings for your project requirement needs, some of which include:

  • ASTM A536 Grade 80-55-06 (SAE D5506)
    • Tensile strength of 80 ksi
    • Yield Strength of 55 ksi
    • Ductility (elongation) is 6%
    • Brinell Hardness of 187-255
  • ASTM A536 Grade 60-40-18 (SAE D4018)
    • Tensile strength of 60 ksi
    • Yield Strength of 40 ksi
    • Ductility (elongation) is 18%
    • Brinell Hardness of 187 maximum
    • Nominal machining speed of 100 m/mm with carbide tools
  • ASTM A536 Grade 65-45-12 (SAE D4512)
    • Tensile strength of 65 ksi
    • Yield Strength of 45 ksi
    • Ductility (elongation) is 12%
    • Brinell Hardness of 156-217
  • ASTM A536 Grade 100-70-03 (SAE D7003)
    • High strength alloy with 100 ksi ultimate
    • Yeild Strength of 70 ksi
    • Ductility (elongation) is limited to 3%
    • Brinell Hardness of 214-302
    • Nominal machining speed of 66 m/mm with carbide tools
    • 10% lighter than carbon steel

Ductile Iron Features & Applications

In addition to “overall” design freedom, ferrous ductile iron castings are more cost effective and produce an increasingly consistent finalized product. This is due to the non-existent shrink rate, which does not require any additional metal to counteract the shrink rate of the metal. Furthermore, correctly designed ductile iron castings prevent the formation of external shrinkage (or short cast) defects in the cast part. A direct example of this is the automobile industry’s wide use of ductile iron in several applications, including safety critical components in the steering and braking systems.

Ductile iron offers design flexibility and reduced manufacturing costs versus welded fabrications and forgings. Ductile iron castings have many “best in class” characteristics, while also benefiting from being a cost-effective alternative to other ferrous alloys. Additionally, ductile irons are widely used in numerous manufacturing industries, including the agricultural, automotive and aerospace industries. 

Austempered Ductile Iron

Austempering is a heat treat process developed to improve the strength and toughness of ferrous alloys like ductile iron.  As-cast ductile iron can be austempered to achieve greater tensile and yield strengths as a secondary service.   Austempering is produced in five (5) different ASTM A897 grades with Grade 1 producing a tensile strength of 130 ksi and a yield of 90 ksi, up to a Grade 5 resulting in a tensile strength of 230 ksi and a yield of 185 ksi.  For Grades 1 -3, secondary machining operations can be performed prior to austempering in most cases.  For Grade 4 and 5, it is recommended the austempering process for ductile iron castings be performed prior to any secondary straightening or machining.

Contact Aero Metals for Ductile Iron Castings

Contact us for more information on ductile iron castings, or request a quote today.