1,We Manufacturing processes are primarily classified into four types:
1:Forging,
2:Casting,
3:Cutting,
4:Rolling.
2,We can manufacture in accordance with these standards.
Standards:
GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards).
Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others.
The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160.
The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500.
Flange Classification
1. **According to Chemical Industry Standards:** Flanges are classified as follows:
Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)).
2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows:
Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation).
3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows:
Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange.
4. **According to Connection Method/Type:** Flanges are classified as follows:
Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc.
5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges.
6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges.
A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts."
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X12CrNi177 Austenitic Stainless Steel Flange for medical instruments Product Information
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X12CrNi177 Austenitic Stainless Steel Flange for medical instruments Synonyms
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X12CrNi177 Austenitic Stainless Steel for medical instruments Product Information
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# 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.
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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
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X12CrNi177 Austenitic Stainless Steel for medical instruments Properties
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Applications of X12CrNi177 Austenitic Stainless Steel Flange for medical instruments
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Chemical Identifiers X12CrNi177 Austenitic Stainless Steel Flange for medical instruments
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Packing of X12CrNi177 Austenitic Stainless Steel Flange for medical instruments
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Standard Packing:
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Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange 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
