Stellite 4 Bar(UNS R30004)

Stellite 4 bar is a high-performance, cobalt-based hard alloy bar that derives its strength from high-hardness carbide phases formed by elements such as chromium, tungsten, and carbon. It is renowned for its exceptional wear resistance, excellent hot hardness, and good corrosion resistance.

Its wear resistance exceeds that of Stellite 6, making it suitable for applications subject to moderate mechanical impact. It is a machinable cast alloy that exhibits excellent resistance to adhesive wear at both room and elevated temperatures. It demonstrates a very low coefficient of friction when sliding against itself or hardened steel.

Stellite 4 alloy bars are commonly used for molds, hot pressing, and hot extrusion applications involving copper-based and aluminum-based alloys. They are also successfully employed in pumps operating in corrosive and abrasive environments.

Product Forms: Round bars, round steel, discs, square bars, etc.; customizable upon request.

Supply Specifications: Cobalt bar diameter: Ф4mm – Ф600mm; customizable according to requirements.

Delivery Condition: As-cast, forged, or solution-treated.

Surface Finish: Turned, ground, or black (as-forged/cast) finishes available upon request.

Reference price range: approximately 50–70 USD/kg

Note: This information is for reference only; the final price is subject to the order. The data provided represent typical values and are not guaranteed. The buyer is responsible for verifying suitability. Prices may be affected by market fluctuations and exchange rates; we reserve the right to adjust prices. Please obtain final confirmation before placing an order.

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Selection and Processing Notes

 

Toughness Limitations

This alloy is more brittle than Stellite 6 and 12 and has lower impact resistance; ensure the application involves low-impact, high-wear conditions.

 

Cannot Be Hardened by Heat Treatment

This alloy cannot be age-hardened via heat treatment; its properties depend primarily on its as-cast or as-forged microstructure.

 

Machinability

It is a difficult-to-machine material; the use of carbide or diamond tools at low speeds and low feed rates is recommended.

 

Welding Recommendations

Welding requires specialized cobalt-based filler wire and strict control of heat input; TIG, MIG, or laser welding processes are recommended.

Density: 8.55-8.75 g/cm³

Hardness: HRC 42-52

Melting Range：1240-1360ºC

Note: The process information above is for reference only and is based on typical processing specifications. Actual results may vary depending on specific equipment, operating conditions, and product forms. Users should evaluate the suitability of the process parameters based on their specific operating conditions; small-scale trials are recommended before mass production. The company makes no warranties, express or implied, regarding the absolute accuracy of the information above or the resulting process outcomes.

 Lork Group
 Marketing Operations Department
 Email: layla@lorkgroup.com
 WhatsApp: +86 199 3707 5488

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