Qingyun Hongsheng Machinery Parts Co., Ltd. is one of the most reliable manufacturers and suppliers of metal casting crucible in China. We warmly welcome you to wholesale high quality metal casting crucible at low price from our factory. If you have any enquiry about quotation, please feel free to email us.
Metal casting crucible
A crucible is a vessel used to melt substances, usually metallic elements, prior to casting. This demands extremely high-temperature resistance, plus outstanding chemical and physical stability. As a minimum, crucibles must have a melting point higher than that of the materials they contain.
The metal crucible material mainly depends on its application field, high temperature resistance, corrosion resistance and cost benefit. The following are the common export metal crucible materials and their characteristics:
1. Cast-iron crucible
characteristic:
Low cost: cast iron is the main material of traditional metal crucible, suitable for mass production, price economy.
Good thermal conductivity: can quickly transfer heat, suitable for melting low melting point metals (such as aluminum, zinc).
Coating protection: may react during direct contact with molten metal (such as aluminum), with borax, ceramic or salt coating to prevent contamination.
application scenarios:
Mainly used for non-iron metal casting (such as aluminum, zinc alloy).
Export markets are common in developing countries or in cost-sensitive regions.
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2. Nickel-based alloy crucible
Typical material:
Inconel Series (e. g. Inconel 600 / 601): heat resistance (up to 1200 C or above), oxidation resistance and corrosion resistance.
Hastelloy Series (such as Hastelloy C276): strong acid resistance, strong alkali corrosion, suitable for melting highly reactive metals.
characteristic:
Excellent high temperature performance: suitable for melting high temperature alloy (such as titanium, nickel-based alloy).
Chemical corrosion resistance: strong stability in acidic or alkaline environments.
Higher cost: raw materials and production processes are complex, expensive to export.
application scenarios:
High-end manufacturing (such as aerospace, nuclear industry).
Mainly exported to Europe, the United States, Japan and South Korea and other industrial developed countries.
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3. Stainless steel crucible (304 / 316 stainless steel)
characteristic:
Good corrosion resistance: suitable for melting low melting point, non-corrosive metals (such as tin, lead).
Economic and practical: the cost is lower than the nickel base alloy, but the high temperature resistance is limited (generally not more than 1000 C).
Surface treatment required: some scenes should be coated with high temperature resistant coating.
application scenarios:
Laboratory, a small foundry.
Export to emerging markets with moderate corrosion resistance requirements (e. g. Southeast Asia, South America).
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4. molybdenum / tungsten alloy crucible
characteristic:
Ultra-high melting point: molybdenum (2620 C), tungsten (3422 C), can be used in an inert gas or vacuum environment.
High temperature creep resistance: suitable for melting ultra-high temperature metals (such as titanium, tantalum, rare earth metals).
Brittleness: to avoid mechanical impact, high processing costs.
application scenarios:
Semiconductor, special metallurgy industry.
The export volume is small, but the unit price is high, mainly flowing to science and technology developed countries (such as the United States, Germany, Japan).
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5. Titanium alloy crucible
characteristic:
Lightweight: low density, easy to operate.
Strong corrosion resistance: suitable for melting acid molten salt or high purity metals.
High cost: titanium metal is expensive and difficult to process.
application scenarios:
High purity metal purification (such as electronic grade silicon, precious metal).
Export to high-end material manufacturing fields (such as the semiconductor industry in South Korea and Taiwan).
Choose and export advice
Clear use: select materials according to the type of molten metal (melting point, reactivity).
Compliance: Export shall meet the environmental and safety standards of the target country (e. g. EU RoHS, REACH).
Coating technology: The high-end market pays more attention to the high temperature resistance and environmental protection of the coating (such as boron-free ceramic coating).
Customization requirements: Special industries (such as the nuclear industry) may require customized alloy materials or composite structure crucibles.
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