X12CrNi177 Austenitic Stainless Steel Sheet,Plate,for medical instruments

X12CrNi177 Austenitic Stainless Steel Sheet/Plate for medical instruments Product Information -:- For detailed product information, please contact sales. -: X12CrNi177 Austenitic Stainless Steel Sheet/Plate for medical instruments Synonyms -:- For detailed product information, please contact sales. -:

X12CrNi177 Austenitic Stainless Steel for medical instruments Product Information -:- For detailed product information, please contact sales. -: # X12CrNi177 (AISI 301) Austenitic Stainless Steel for Medical Instruments ## Overview X12CrNi177 (commonly known as AISI 301 or EN 1.4310) is a chromium-nickel austenitic stainless steel that exhibits excellent corrosion resistance, good formability, and high strength potential through cold working. While not as corrosion-resistant as 304 or 316 grades, it offers a unique combination of moderate corrosion resistance and the ability to be work-hardened to high strength levels, making it suitable for specific medical instrument applications where spring properties and durability are required. ## International 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 for Pressure Vessels and for General Applications - **EN 10088-3:** Stainless steels – Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products - **UNS S30100:** Unified Numbering System designation - **AISI 301:** American Iron and Steel Institute designation - **DIN/EN 1.4310:** European material number ## Chemical Composition (Typical, % by weight) | Element | Content (%) | |---------|-------------| | Carbon (C) | ≤ 0.15 | | Chromium (Cr) | 16.0–18.0 | | Nickel (Ni) | 6.0–8.0 | | Silicon (Si) | ≤ 1.00 | | Manganese (Mn) | ≤ 2.00 | | Phosphorus (P) | ≤ 0.045 | | Sulfur (S) | ≤ 0.030 | | Iron (Fe) | Balance | *Note: Lower nickel content compared to 304 (8-10.5% Ni) makes it more susceptible to work hardening and slightly less corrosion resistant.* ## Physical Properties (Annealed Condition) | Property | Value | |----------|-------| | Density | 7.90 g/cm³ | | Melting Point | 1399–1421 °C | | Thermal Conductivity | 16.3 W/m·K (at 20°C) | | Electrical Resistivity | 0.72 μΩ·m | | Modulus of Elasticity | 193 GPa | | Magnetic Properties | Essentially non-magnetic when annealed; may become slightly magnetic when cold worked | | Coefficient of Thermal Expansion | 17.2 × 10⁻⁶/K (20-100°C) | ## Mechanical Properties ### Annealed Condition | Property | Value | |----------|-------| | Tensile Strength | 515–720 MPa | | Yield Strength (0.2% offset) | ≥ 205 MPa | | Elongation at Break | ≥ 40% | | Hardness (Rockwell B) | ≤ 95 HRB | ### Cold Worked Condition (Typical for medical applications) | Property | 1/4 Hard | 1/2 Hard | Full Hard | |----------|----------|----------|-----------| | Tensile Strength (MPa) | 760–965 | 930–1130 | 1200–1500 | | Yield Strength (MPa) | 515 min | 760 min | 965 min | | Elongation (%) | 25 min | 10 min | 3 min | | Hardness (HRB) | ≤ 100 | ≤ 108 | ≤ 110 | ## Heat Treatment - **Annealing:** Heat to 1010–1120°C followed by rapid cooling (water quenching) to maintain austenitic structure and prevent carbide precipitation. - **Stress Relieving:** 400–450°C for 1-2 hours to relieve internal stresses from cold working without significantly reducing strength. - **No hardening by heat treatment:** This grade cannot be hardened by quenching; strength is achieved exclusively through cold working. ## Product Applications in Medical Field X12CrNi177 is particularly suitable for medical instruments requiring spring properties and durability: ### Primary Applications: 1. **Surgical Clamps and Forceps:** Especially spring-loaded types 2. **Needle Holders:** Components requiring spring tension 3. **Retractors:** Self-retaining retractors with spring mechanisms 4. **Clip Applicators:** Instruments requiring maintained tension 5. **Biopsy Instrument Components:** Springs and flexible elements 6. **Orthodontic Appliances:** Springs and archwires (specific biocompatible variants) 7. **Medical Device Components:** Springs, clips, and retainers in various devices ### Advantages for These Applications: - Excellent spring properties after cold working - Good fatigue resistance - Maintains strength and elasticity after repeated use - Can be formed into complex shapes before hardening ## Corrosion Resistance - **General Corrosion:** Good resistance to atmospheric corrosion, water, and many chemicals - **Medical Environments:** Adequate resistance to bodily fluids, sterilization processes, and disinfectants - **Comparison:** Less resistant than 304 or 316 grades, particularly in chloride environments - **Sterilization:** Withstands standard sterilization methods (autoclave, chemical, radiation) - **Pitting/crevice corrosion:** Moderate resistance; not recommended for prolonged exposure to chloride solutions ## Fabrication and Processing Characteristics ### Machinability: - Fair machinability in annealed condition (approximately 45% of B1112 steel) - Improved with cold worked material - Use sharp tools, positive rake angles, and adequate cooling ### Forming: - **Excellent cold forming characteristics** in annealed condition - Rapid work hardening requires intermediate annealing for severe forming operations - Can be deep drawn, stretch formed, and spun ### Welding: - Good weldability by all standard methods - Post-weld annealing recommended for maximum corrosion resistance - Low carbon content minimizes carbide precipitation in heat-affected zone ### Surface Finishing: - Takes excellent polish - Can be electroplated with proper preparation - Passivation with nitric acid improves corrosion resistance ## Special Considerations for Medical Use ### Biocompatibility: - Generally considered biocompatible for instrument applications - For implantable applications, specific testing per ISO 10993 is required - Nickel content may cause sensitivity in some individuals with prolonged skin contact ### Sterilization Compatibility: - **Autoclaving:** Excellent resistance (up to 134°C) - **Dry Heat:** Suitable (up to 250°C for short periods) - **Chemical/Radiation:** Compatible with all standard medical sterilization methods ### Maintenance: - Requires proper cleaning to prevent corrosion - Should be kept dry when not in use - Regular inspection for signs of corrosion or fatigue ## Quality Assurance Requirements - Material certification to applicable standards (EN 10204 3.1/3.2) - Controlled chemical composition with special attention to carbon and nickel content - Surface quality requirements per medical instrument specifications - Traceability from raw material to finished instrument - For critical applications, microcleanliness requirements may apply ## Comparison with Other Austenitic Grades for Medical Use | Property | X12CrNi177 (301) | 304 (X5CrNi18-10) | 316 (X2CrNiMo17-12-2) | |----------|------------------|-------------------|------------------------| | Corrosion Resistance | Good | Very Good | Excellent | | Strength (Annealed) | Good | Good | Good | | Strength (Cold Worked) | **Excellent** | Good | Good | | Formability | Excellent | Excellent | Excellent | | Spring Properties | **Best** | Good | Good | | Cost | Moderate | Moderate | Higher | ## Conclusion X12CrNi177 (AISI 301) austenitic stainless steel offers a specialized combination of properties that make it particularly valuable for specific medical instrument applications. Its ability to be cold worked to high strength levels while maintaining good corrosion resistance and excellent spring properties makes it ideal for surgical instruments requiring elasticity, durability, and maintained tension. While not as corrosion-resistant as 304 or 316 grades, it provides adequate performance for most medical instrument applications at a competitive cost. For instruments where spring action, repeated flexing, or specific mechanical properties are critical requirements, X12CrNi177 represents a technically and economically sound choice that has been proven in medical applications for decades. Proper material selection, processing, and maintenance ensure optimal performance throughout the instrument's service life. -:- For detailed product information, please contact sales. -: X12CrNi177 Austenitic Stainless Steel for medical instruments Specification Dimensions Size： Diameter 20-1000 mm Length <7407 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. -: X12CrNi177 Austenitic Stainless Steel for medical instruments Properties -:- For detailed product information, please contact sales. -:

Applications of X12CrNi177 Austenitic Stainless Steel Sheet,Plate for medical instruments -:- For detailed product information, please contact sales. -: Chemical Identifiers X12CrNi177 Austenitic Stainless Steel Sheet,Plate for medical instruments -:- For detailed product information, please contact sales. -:

Packing of X12CrNi177 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 3878 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