904L 254SMO Super Alloy
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
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GNEE Products Description
AISI 904L is a high alloy low carbon austenitic stainless steel with good general corrosion resistance. EN 1.4539 is fully austenitic but is less sensitive to precipitation of sigma phase than conventional austenitic grades with high molybdenum content.
254SMO is an austenitic stainless steel. Due to its high molybdenum content, it has extremely high resistance to pitting and crevice corrosion. This grade of stainless steel was developed for use in environments containing halides such as seawater.
| Element | Composition range (weight %) |
Purpose |
|---|---|---|
| Ni, Fe, Co | 50-70% | These elements form the base matrix γ phase of the superalloy. Ni is necessary because it also forms γ' (Ni3Al). Fe and Co have higher melting points than Ni and offer solid solution strengthening. Fe is also much cheaper than Ni or Co. |
| Cr | 5-20% | Cr is necessary for oxidation and corrosion resistance; it forms a protective oxide Cr2O3. |
| Al | 0.5-6% | Al is the main γ' former. It also forms a protective oxide Al2O3, which provides oxidation resistance at higher temperature than Cr2O3. |
| Ti | 1-4% | Ti forms γ'. |
| C | 0.05-0.2% | MC and M23C6 (M = metal) carbides are the strengthening phase in the absence of γ'. |
| B,Zr | 0-0.1% | Boron and zirconium provide strength to grain boundaries. This is not essential in single-crystal turbine blades, because there are no grain boundaries. |
| Nb | 0-5% | Nb can form γ'', a strengthening phase at lower (below 700 °C) temperatures. |
| Re, W, Hf, Mo, Ta | 1-10% | Refractory metals, added in small amounts for solid solution strengthening (and carbide formation). They are heavy, but have extremely high melting points. |
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FAQ
Q: Do you provide samples? Is it free or extra?
A: Yes, we can provide samples for free without paying the shipping cost.
Q: What are your payment terms?
A: Payment <=1000USD, 50% in advance. Payment >=1000USD, 30% T/T in advance, balance before shipment. or negotiable
Q: What are the advantages of your company?
A: We have many professionals, technicians, more competitive prices and the best after-sales service than other stainless steel companies.
Q: About the product price of 904L 254SMO superalloy?
A: Due to cyclical changes in raw material prices, prices vary in different periods.
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