X6CrNiTi1810 Austenitic Stainless Steel Sheet,Plate,for medical instruments

X6CrNiTi1810 Austenitic Stainless Steel Sheet/Plate for medical instruments Product Information -:- For detailed product information, please contact sales. -: X6CrNiTi1810 Austenitic Stainless Steel Sheet/Plate for medical instruments Synonyms -:- For detailed product information, please contact sales. -:

X6CrNiTi1810 Austenitic Stainless Steel for medical instruments Product Information -:- For detailed product information, please contact sales. -: # X6CrNiTi18-10 Stabilized Austenitic Stainless Steel for Medical Instruments ## Overview X6CrNiTi18-10 is a titanium-stabilized austenitic stainless steel that offers enhanced resistance to intergranular corrosion while maintaining excellent mechanical properties and formability. As a stabilized variant of the ubiquitous 304/304L stainless steel, it provides superior performance in applications involving elevated temperatures or welding operations where standard grades might be susceptible to sensitization. This makes it particularly valuable for medical instruments and equipment that undergo repeated high-temperature sterilization cycles or require complex fabrication with multiple welds. ## International Standards & Designations - **EN 10088-3:** 1.4541 (Primary European designation) - **AISI 321 / UNS S32100:** Equivalent American standards - **ISO 7153-1:** Surgical instruments – Materials – Part 1: Metals - **ASTM A240/A240M:** Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip - **ASTM A276/A276M:** Standard Specification for Stainless Steel Bars and Shapes - **JIS SUS321:** Japanese Industrial Standard - **GOST 08Ch18N10T:** Russian Federation Standard - **ISO 4954:** Steel for heat treatment, alloy steel and free-cutting steel – Technical delivery conditions ## Chemical Composition (Typical, % by weight) | Element | Content Range (%) | Medical Grade Target (%) | Functional Role | |---------|-------------------|--------------------------|-----------------| | **Carbon (C)** | 0.04–0.08 | 0.05–0.07 | Strength contributor | | **Chromium (Cr)** | 17.0–19.0 | 17.5–18.5 | Corrosion resistance | | **Nickel (Ni)** | 9.0–12.0 | 9.5–10.5 | Austenite stabilizer | | **Titanium (Ti)** | 5×C min – 0.70 max | 0.30–0.60 | Stabilizing element | | **Manganese (Mn)** | ≤ 2.00 | 1.0–1.8 | Austenite stabilizer | | **Silicon (Si)** | ≤ 1.00 | ≤ 0.75 | Deoxidizer | | **Phosphorus (P)** | ≤ 0.045 | ≤ 0.035 | Impurity control | | **Sulfur (S)** | ≤ 0.030 | ≤ 0.015 | Machinability enhancer | | **Nitrogen (N)** | ≤ 0.11 | ≤ 0.08 | Optional strength enhancer | | **Iron (Fe)** | Balance | Balance | Base element | **Stabilization Mechanism:** The titanium addition (minimum 5 times the carbon content) preferentially forms titanium carbides (TiC) rather than chromium carbides during heating in the sensitization temperature range (450–850°C). This prevents chromium depletion along grain boundaries, thereby maintaining corrosion resistance in heat-affected zones. ## Physical Properties (Annealed Condition) | Property | Value | Notes | |----------|-------|-------| | **Density** | 7.90 g/cm³ | Similar to 304/304L | | **Melting Point** | 1400–1450 °C | Depends on exact composition | | **Thermal Conductivity** | 16.2 W/m·K (at 20°C) | Good for sterilization equipment | | **Specific Heat Capacity** | 500 J/kg·K | Standard for austenitic steels | | **Electrical Resistivity** | 0.72 μΩ·m | Slightly higher than unstabilized grades | | **Modulus of Elasticity** | 193–200 GPa | Standard austenitic value | | **Magnetic Permeability** | <1.02 (annealed) | Practically non-magnetic | | **Coefficient of Thermal Expansion** | 16.0–17.5 × 10⁻⁶/K (20–100°C) | Important for thermal cycling | | **Thermal Diffusivity** | 4.1 mm²/s | Affects heat transfer | ## Mechanical Properties (Annealed Condition) | Property | Minimum Value | Typical Value | Condition | |----------|---------------|---------------|-----------| | **Tensile Strength (Rm)** | 500 MPa | 520–670 MPa | Annealed | | **Yield Strength (Rp0.2)** | 200 MPa | 210–300 MPa | Annealed | | **Elongation at Break (A)** | 40% | 45–55% | Annealed | | **Reduction of Area (Z)** | 50% | 60–70% | Annealed | | **Hardness (Brinell)** | ≤ 215 HBW | 170–200 HBW | Annealed | | **Hardness (Rockwell B)** | ≤ 95 HRB | 85–92 HRB | Annealed | | **Impact Toughness (Charpy V)** | ≥ 100 J | 120–180 J | Room temperature | | **Fatigue Strength (10⁷ cycles)** | 240 MPa | 260–300 MPa | Rotating bending | *Note: Cold working can increase tensile strength to 800–1000 MPa with corresponding reduction in ductility.* ## Heat Treatment & Microstructural Characteristics ### **Solution Annealing:** - **Temperature:** 920–1150°C (typically 1050°C) - **Cooling:** Rapid air cool or water quench - **Purpose:** Dissolve carbides and obtain homogeneous austenitic structure ### **Stabilization Annealing:** - **Temperature:** 850–950°C - **Cooling:** Air cooling - **Purpose:** Precipitate titanium carbides in a controlled manner, preventing subsequent chromium carbide formation ### **Microstructural Features:** - Fully austenitic structure with occasional small amounts of delta ferrite (<5%) - Titanium carbide (TiC) and titanium carbonitride (Ti(C,N)) precipitates - Grain size typically ASTM 5–8 (fine to medium) ### **Weldability Considerations:** - **Excellent weldability** by all conventional methods - No post-weld heat treatment required for most medical applications - Sensitization resistance maintained in heat-affected zones - Recommended filler metals: ER321, ER347, or overalloyed grades for critical applications ## Corrosion Resistance ### **General Characteristics:** - **Excellent general corrosion resistance** comparable to 304/304L - **Superior intergranular corrosion resistance** after welding or exposure to sensitization temperatures (450–850°C) - Good resistance to oxidizing acids, organic acids, and alkalis - Moderate resistance to chloride-induced pitting and crevice corrosion (similar to 304) ### **Medical Environment Performance:** - **Body Fluids:** Excellent resistance to blood, serum, and physiological solutions - **Sterilization Methods:** - **Autoclaving (steam):** Excellent resistance (121–134°C) - **Dry Heat:** Suitable for repeated cycles up to 250°C - **Chemical Sterilization:** Compatible with ethylene oxide, glutaraldehyde, hydrogen peroxide plasma - **Radiation:** No significant degradation from gamma or electron beam sterilization - **Disinfectants:** Good resistance to alcohols, quaternary ammonium compounds; moderate resistance to chlorine-based disinfectants ### **Limitations:** - Not recommended for continuous service in strongly reducing acids - Limited pitting resistance in high-chloride environments - Potential for stress corrosion cracking in chloride environments above 60°C ## Product Applications in Medical Field ### **Primary Medical Applications:** 1. **Sterilization and Processing Equipment:** - Autoclave chambers, trays, and racks - Dry heat sterilizer components - Washer-disinfector internal components - Medical instrument reprocessing equipment 2. **Surgical Instruments with Welded Components:** - Instruments requiring complex fabrication with multiple welds - Custom surgical tools with brazed or welded attachments - Instrument repair and modification 3. **Medical Equipment Exposed to Thermal Cycling:** - Surgical light components - Equipment housings near heat sources - Laboratory equipment requiring thermal stability 4. **Dental and Orthodontic Applications:** - Dental furnace components - Orthodontic appliance manufacturing equipment - Dental instrument sterilization trays 5. **Pharmaceutical Processing Equipment:** - Reactor vessels and piping - Heat exchangers in pharmaceutical production - Storage vessels for medical solutions ### **Advantages for Medical Use:** - **Thermal Stability:** Maintains corrosion resistance after repeated high-temperature exposure - **Fabrication Flexibility:** Excellent weldability without sensitization concerns - **Proven Performance:** Long history of use in high-temperature applications - **Cost-Effective:** More economical than molybdenum-containing grades for many applications - **Hygienic Properties:** Smooth, non-porous surface facilitates cleaning and sterilization ## Fabrication Characteristics ### **Machinability:** - **Fair machinability** (approximately 45% of free-cutting steel) - **Challenges:** Work hardening tendency and abrasive titanium carbides - **Recommended Practices:** - Use sharp carbide tools with positive rake angles - Moderate cutting speeds (20–30 m/min for turning) - Adequate feed rates to minimize work hardening - Copious coolant flow to manage heat and chip removal - Consider sulfur-enhanced variants (1.4541S) for improved machinability ### **Forming Operations:** - **Excellent cold formability** – suitable for deep drawing, bending, stamping - Higher springback than carbon steels due to higher yield strength - May require intermediate annealing for severe forming operations - Hot working range: 1150–900°C with rapid cooling below 850°C ### **Surface Treatment & Finishing:** - **Electropolishing:** Effective for achieving smooth, hygienic surfaces - **Passivation:** Nitric acid treatment (20–50% at 20–50°C) enhances corrosion resistance - **Mechanical Polishing:** Can achieve mirror finishes (Ra < 0.1 μm) - **Special Coatings:** Various medical-grade coatings can be applied for specific applications ## Biocompatibility and Regulatory Considerations ### **Biocompatibility Assessment:** - **ISO 10993 Compliance:** Generally meets requirements for medical device applications - **Cytotoxicity:** Typically non-cytotoxic (ISO 10993-5) - **Sensitization:** Nickel content may require consideration for sensitive patients - **Implantation:** Limited data for long-term implantation; primarily used for instruments rather than implants ### **Regulatory Status:** - **FDA:** Recognized as acceptable for certain medical device applications - **EU MDR:** Acceptable with appropriate technical documentation - **Special Considerations:** Titanium-stabilized grades are less common in implant applications than 316L or titanium alloys ### **Surface Characterization Requirements:** - Surface roughness specifications for cleanability - Passivation validation for corrosion resistance - Freedom from surface defects and contamination ## Quality Assurance for Medical Applications ### **Material Certification:** - EN 10204 3.1 certificate with full traceability - Chemical analysis including titanium content verification - Mechanical property testing - Corrosion testing (intergranular corrosion test per ASTM A262 Practice E) ### **Special Testing for Medical Grade:** - Intergranular corrosion testing after sensitization heat treatment - Surface finish verification - Cleanliness testing for critical applications - Sterilization cycle validation ### **Microstructural Requirements:** - Grain size control (typically ASTM 5–8) - Titanium carbide distribution assessment - Delta ferrite content verification (<5% typically specified) ## Comparison with Related Stainless Steels | Property | X6CrNiTi18-10 (1.4541) | X5CrNi18-10 (1.4301/304) | X2CrNiMo17-12-2 (1.4404/316L) | X6CrNiNb18-10 (1.4550/347) | |----------|------------------------|---------------------------|--------------------------------|----------------------------| | **Stabilizing Element** | Titanium | None | None | Niobium | | **Carbon Content** | 0.04–0.08% | ≤0.07% | ≤0.030% | 0.04–0.08% | | **Intergranular Corrosion Resistance** | **Excellent** | Good (if low carbon) | Excellent (due to low carbon) | **Excellent** | | **High-Temperature Stability** | **Excellent** | Poor | Good | **Excellent** | | **Cost Factor** | 1.2–1.5×304 | 1.0 (Baseline) | 1.3–1.6×304 | 1.3–1.7×304 | | **Primary Medical Use** | High-temperature equipment | General instruments | Corrosive environments | High-temperature equipment | ## Limitations and Special Considerations ### **Material Limitations:** - **Limited pitting resistance** in chloride environments - **Not suitable for cutting edges** requiring high hardness - **Potential for titanium oxide formation** during welding (not detrimental to corrosion resistance) - **Higher cost** than unstabilized 304 grades ### **Design Considerations:** - Account for thermal expansion in assemblies - Specify appropriate surface finishes for intended use - Consider galvanic compatibility with other materials - Evaluate sterilization method compatibility ### **Manufacturing Considerations:** - Titanium carbides can be abrasive to cutting tools - Special care needed during grinding to avoid overheating - Welding procedures should minimize heat input while ensuring proper fusion ## Future Developments and Trends ### **Advanced Processing:** - Improved melting practices for cleaner steel - Enhanced surface treatment technologies - Additive manufacturing compatibility assessment ### **Medical Application Expansion:** - Evaluation for new sterilization technologies - Assessment for single-use device applications - Investigation of surface modifications for enhanced performance ## Economic and Environmental Aspects ### **Cost Considerations:** - Higher initial cost than standard 304 but often more economical than 316L - Life cycle cost benefits through extended service life in high-temperature applications - Reduced maintenance costs due to improved thermal stability ### **Environmental Impact:** - 100% recyclable through standard stainless steel recycling streams - Long service life reduces environmental footprint through reduced replacement frequency - Energy requirements for production comparable to other austenitic stainless steels ## Conclusion X6CrNiTi18-10 represents a specialized austenitic stainless steel that offers unique advantages for medical applications involving elevated temperatures, welding operations, or thermal cycling. Its titanium stabilization provides excellent resistance to intergranular corrosion, making it particularly suitable for medical instruments and equipment that undergo repeated sterilization cycles or require complex fabrication with welding. While its corrosion resistance in chloride environments is comparable to standard 304 rather than the superior performance of molybdenum-containing grades like 316L, its thermal stability and weldability make it an excellent choice for specific medical applications where these properties are paramount. The alloy's proven performance history, combined with good mechanical properties and fabricability, ensures its continued relevance in medical device manufacturing. For medical instrument designers and manufacturers, X6CrNiTi18-10 offers a cost-effective solution for applications where standard 304 might be susceptible to sensitization, but the enhanced corrosion resistance of 316L is not required. Its selection should be based on a careful evaluation of the specific service conditions, with particular attention to temperature exposure, fabrication requirements, and sterilization protocols. As medical sterilization technologies continue to evolve and instrument designs become more complex, stabilized stainless steels like X6CrNiTi18-10 will continue to play an important role in ensuring the reliability and longevity of medical devices in demanding healthcare environments. -:- For detailed product information, please contact sales. -: X6CrNiTi1810 Austenitic Stainless Steel for medical instruments Specification Dimensions Size： Diameter 20-1000 mm Length <7416 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: X6CrNiTi1810 Austenitic Stainless Steel for medical instruments Properties -:- For detailed product information, please contact sales. -:

Applications of X6CrNiTi1810 Austenitic Stainless Steel Sheet,Plate for medical instruments -:- For detailed product information, please contact sales. -: Chemical Identifiers X6CrNiTi1810 Austenitic Stainless Steel Sheet,Plate for medical instruments -:- For detailed product information, please contact sales. -:

Packing of X6CrNiTi1810 Austenitic Stainless Steel Sheet/Plate for medical instruments -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Sheet/Plate drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3887 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition