AMS 5225G specification covers an iron-nickel alloy in the form of strip. Ni-Span C902 (UNS N09902 / Ni42CrTiAl / Chinese 3J53) is a precipitation-hardenable Nickel-Iron-Chromium alloy having outstanding controllable thermoelastic coefficient characteristics and excellent oxidation resistance in high-temperature atmospheres . ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering AMS 5225 Ni-Span C902 alloy at factory-direct prices with full material traceability and fast global delivery.
Product Specifications & Physical DataNi-Span C902 can be processed to have a constant modulus of elasticity at temperatures ranging from -45°C to +65°C (-50°F to +150°F) . The alloy exhibits low magnetostrictive properties, making it suitable for applications requiring high precision and stability. Ni-Span C902 Superalloy ApplicationsNickel alloy UNS 09902 is used for a multitude of applications, including: - Tuning forks & Vibrating reeds
- Leaf springs
- Helical springs
- Precision elastic parts
- Diaphragms
Product Forms & Availability – Ni-Span C902 (UNS N09902 / 3J53)| Product Form | Thickness / Size Range | Condition |
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| Strip | 0.0005″ – 0.040″ (0.0127mm – 1.016mm) | Solution heat treated | | Sheet | 0.1mm – 3.5mm | Solution heat treated | | Plate | 3.5mm – 40.0mm | Solution heat treated | | Wire | 0.02mm – 5.0mm | Solution heat treated | | Bar | 5.0mm – 180.0mm | Solution heat treated | | Tube / Pipe | Custom | Solution heat treated |
For all stock availability, contact Sales. Specifications – Ni-Span C902| Specification | Description |
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| AMS 5225 | Strip – iron-nickel alloy | | AMS 5221 | Alternative specification | | AMS 5223 | Alternative specification | | UNS N09902 | Unified numbering system | | 3J53 | Chinese standard | | Ni42CrTiAl | European designation | | HS 261 | Harmonized System code |
Chemical CompositionThe properties of Ni-Span C 902 are derived from its Fe-Ni-Cr base combined with precipitation strengthening. The following represents the typical composition range. | Material Type | C | Ai | Ti | Ni | Cr | P / Si / Mn | Fe |
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| Content (%) | ≤ 0.05 | 0.3 - 0.8 | 2.2 - 2.75 | 41.0 - 43.5 | 4.9 - 5.75 | ≤0.30 | Balance |
Mechanical and Physical PropertiesWe will discuss Ni-Span C 902 constant modulus alloys based on their heat-treatment states—for the same material, different states result in vastly different properties. | Heat Treatment Condition | Annealed Condition (Solution Treated) | Spring-Tempered Condition (Cold-Worked/Strain-Hardened) | Spring Tempering + Aging Treatment (Final Condition) |
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| Tensile Strength | 600 – 800 MPa | 900 – 1100 MPa | 1300 – 1500 MPa (Typical values can exceed 1450 MPa) | | Hardness | – | – | 350 – 450 HV (Approx. 37–44 HRC) | | Elongation | ≥30% | – | ≥ 5–6% | | Elastic Modulus (E) | – | – | 165 – 200 GPa (Varies with heat treatment condition) | | Characteristics | Soft and easily machinable (turning, milling, drilling, stamping). The material is typically supplied in the annealed state, allowing you to perform the aging treatment yourself. | Possesses a certain level of inherent strength; the degree of cold-working deformation is precisely controlled. For certain spring applications, this material is purchased and utilized directly in this specific condition. | – | | Recommended Purchase | Suitable for purchasing raw materials to be subsequently processed in-house into precision components (such as bellows, diaphragms, and complex-shaped springs). | Suitable for manufacturing"ready-to-use elastic components"(such as sensor elastic bodies and precision springs). | What would be suitable for you to work on is the"Resonant Cavity/Tuning Fork for Temperature-Controlled Crystal Oscillators"(which requires extremely high frequency stability). | | What Lork Can Do | We can supply annealed, precision-ground bars manufactured according to your drawings, featuring a surface roughness of Ra ≤ 0.8 μm and a straightness of ≤ 0.1 mm/m, ready for direct machining. | We can provide certain in-house testing services, as well as assist with third-party testing, such as through SGS. | We can provide batch-tested E-T curves (Elastic Modulus-Temperature curves) covering the range from -50°C to +100°C. |
If you would like to understand why the information above varies across different heat treatment states—or if you have other specific applications in mind for this constant-modulus alloy (Ni-Span C 902)—we would be happy to discuss the details further.
Factory Price – AMS 5225 Ni-Span C902 Strip / Bar (UNS N09902 / 3J53)Indicative factory pricing (FOB China): | Product Form | Thickness / Diameter | Condition | Price (USD/kg) |
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| Strip / Foil | 0.0005″ – 0.040″ | Solution heat treated | $80 – $200 | | Sheet | 0.1mm – 3.5mm | Solution heat treated | $60 – $150 | | Plate | 3.5mm – 40.0mm | Solution heat treated | $50 – $120 | | Wire | 0.02mm – 5.0mm | Solution heat treated | $100 – $250 | | Bar | 5.0mm – 180.0mm | Solution heat treated | $50 – $120 |
Aged / Heat Treated Condition: Add 10 – 20% to base price. Volume discounts available for orders above 100 kg. Custom sizes and specifications available – contact us for a firm quote.
Delivery Lead Times (after pre-payment confirmation)| Stock Status | Delivery Time |
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| Products in stock | Within 3 days | | Raw material in stock | Within 10 days | | Re-melting required | 15 – 25 days |
Contact ZYTC Alloy TodayRequest a quote for AMS 5225 / Ni-Span C902 Alloy (UNS N09902 / 3J53) – Iron-Nickel-Chromium Alloy – Constant Modulus of Elasticity – Precipitation Hardenable – Precision Instrument Grade . Please provide: Product form (strip / wire / bar / sheet / plate / tube) Thickness / diameter required Length or weight required Heat treatment condition (solution treated / aged) Quantity Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
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