The price of stainless steel is usually 2-3 times that of ordinary carbon steel, which involves multiple factors such as raw material cost, production process, and performance advantages. This article will conduct in-depth analysisFive key reasons why stainless steel is more expensive than ordinary steel, including alloy composition, corrosion resistance, production process, service life and market supply and demand, help you understand the nature of price differences.
1. The alloy composition is high
The core value of stainless steel lies in itsChromium nickel content:
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Chromium content ≥10.5%: Form a chromium oxide protective film (not included in ordinary steel)
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Nickel content 8-10%: Enhanced ductility and corrosion resistance (304 stainless steel)
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Molybdenum addition: Further improve corrosion resistance (316 stainless steel)
Cost comparison:
| Material | Main alloy | Price (yuan/ton) |
|---|---|---|
| Q235 carbon steel | Iron + Carbon | 4,000-5,000 |
| 304 stainless steel | Iron + chromium + nickel | 15,000-20,000 |
| 316 stainless steel | Iron + chromium + nickel + molybdenum | 25,000-30,000 |
2. The production process is more complex
Stainless steel manufacturing requires special processes:
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AOD refining: Argon oxygen decarbonization process control impurities (increase cost by 15-20%)
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Continuous casting requirements: It is necessary to protect the atmosphere from oxidation
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Heat treatment: Solid solution treatment (1100°C quench cooling) ensures performance
3. Excellent performance advantages
The premium of stainless steel comes from its irreplaceable properties:
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Corrosion resistance: 3-5 times longer than ordinary steel
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Maintenance-free: No regular anti-rust treatment required
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Hygiene: Comply with food grade standards (GB4806.9-2016)
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Beautifulness: Keep metallic luster and stainless
4. Economic Account for Service Life
Although the initial cost is high,Lower life cycle costs:
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Ordinary steel: need to be replaced in 3-5 years (shorter in coastal areas)
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Stainless steel: can be used for 15-20 years
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Case: Stainless steel roof saves 40% long-term cost compared to galvanized steel plate
5. Market supply and demand relationship
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Nickel price fluctuations: Accounts for 60% of the cost of stainless steel (the price of LME nickel in 2023 is about $20,000/ton)
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Import dependency: my country's nickel ore imports account for more than 80%
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High-end production capacity: Precision stainless steel belt still needs to be imported
