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DURA-BAR CAST IRON

Continuous cast Gray Iron contains flake graphite in matrix structures that range from all pearlite to pearlite plus ferrite. The matrix structure will influence machinability, strength, hardness and wear characteristics. In general, a fully pearlitic matrix will have the best mechanical properties and will be readily machinable. Bars containing ferrite in the matrix will be easier to machine but will be lower in strength and wear resistance.

Continuous cast Ductile Iron contains nodular graphite in a matrix of pearlite and ferrite. The spheroidal shaped graphite maximizes the strength of cast iron. The ratio of ferrite to pearlite in the matrix varies in each of the three grades in order to produce the required tensile and yield strengths and elongation properties. The nodular graphite provides the same free machining benefits as lead (steel) without the machining and waste disposal problems.

Available Grades:​

Dura-Bar G2 Pearlitic Gray Iron Properties

Dura-Bar 65-45-12 Ductile Iron Properties

Dura-Bar 80-55-06 Ductile Iron Properties

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Solid Round Diameters: Up to and including 20" diameter

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Tube Diameters: 1-1/2" inside diameter x 3" outside diameter through 7" inside diameter x 9" outside diameter.

 

Rectangles: 1" thick x 2" wide through 7-1/2" thick x 20-1/2" wide. 

 

Squares: 3" through 10" square.Special Shapes: Up to 10" in cross section thickness

dura-bar iron

Gray iron and ductile iron are excellent for hydraulic & pneumatic parts due to their strength, wear resistance, vibration damping, and machinability, used in pump bodies, valve blocks (manifolds), cylinders, and gears, handling high pressures (often 3000+ psi) and frequent cycling for cost-effective, durable components in construction, automation, and automotive systems.

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Key Advantages

  • High Strength & Stiffness: Withstands significant internal pressures in hydraulic pumps and actuators.

  • Wear Resistance: Ideal for moving parts like pistons and gears, especially continuous cast iron grades.

  • Vibration Damping: Gray iron's structure absorbs shock and reduces noise in hydraulic systems.

  • Machinability: Easily cast into complex shapes like valve blocks with intricate channels.

  • Self-Lubricating: Continuous cast iron's properties allow for long-lasting cylinders with minimal wear. ​

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Common Applications

  • Hydraulics:

    • Pump Bodies & Housings: For gear, vane, and piston pumps.

    • Valve Blocks (Manifolds): For controlling fluid flow.

    • Cylinders & Pistons: For linear motion.

    • Rotary Joints: For transmitting fluid to rotating parts.

  • Pneumatics:

    • Air Cylinders: Durable reciprocating parts.

    • Air-Operated Valves: For controlling compressed air.

    • Pneumatic Tool Components: Structural parts for air tools. 

dura-bar ductile iron
ductile-iron-round-bar
bronze

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What's Driving
Metal Prices

Factors creating the on-going surge in copper prices and base metal prices.

The U.S. imposed a 50% Section 232 tariff on the copper content of semi-finished and derivative copper products, effective August 1, 2025. These tariffs aim to bolster domestic production but create complexities for businesses in pricing, sourcing, and compliance, affecting global copper markets. 

In addition copper costs are soaring due to massive demand from the energy transition (EVs, renewables, grid) and AI data centers colliding with slow mine supply growth, production disruptions (labor, technical issues), aging mines, and government policies like tariffs, creating a structural supply deficit. 

Tin prices jumped to a record level due to a severe, ongoing global supply squeeze from mine disruptions (DRC, Myanmar, Indonesia) and increasing demand driven by its critical role in electronics (solder), green energy tech, and packaging, creating a significant market deficit and attracting speculative investment. Supply chain issues, including export permit delays and political instability in key producing regions, combined with growing recognition of tin's necessity for the energy transition, fueled a rally to multi-year highs in late 2025 and early 2026. 

Nickel prices are rising due to anticipated supply cuts from major producer Indonesia, tighter quotas, increased demand from stainless steel and EV battery sectors (despite some LFP shifts), speculative buying, and broader market strength in metals, with investors reacting to policy signals and potential disruptions.

metals@anchorbronze.com

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