ASTM A778 TP304L TP316L TP317L TP321 TP347 Welded Unannealed Austenitic Stainless Steel Tubular for Medical
Introduction
ASTM A778 is a standard specification for welded unannealed austenitic stainless steel tubular products. This specification is particularly relevant in the medical field, where the properties of the materials used are critical for ensuring safety and efficacy. The grades covered under this specification include TP304L, TP316L, TP317L, TP321, and TP347, each offering unique characteristics suitable for various applications.
Material Specification
The materials specified under ASTM A778 are designed to meet stringent requirements for corrosion resistance, mechanical properties, and weldability. The following grades are commonly used in medical applications:
- TP304L: Low carbon version of TP304, excellent corrosion resistance.
- TP316L: Contains molybdenum, enhancing resistance to pitting and crevice corrosion.
- TP317L: Higher molybdenum content for improved corrosion resistance.
- TP321: Titanium-stabilized grade, suitable for high-temperature applications.
- TP347: Niobium-stabilized grade, offering excellent high-temperature strength.
Chemical Composition
| Grade | C (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | N (%) |
| TP304L | ≤0.03 | 2.00-2.50 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-12.0 | - | - |
| TP316L | ≤0.03 | 1.00-2.00 | ≤0.045 | ≤0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | - |
| TP317L | ≤0.03 | 1.00-2.50 | ≤0.045 | ≤0.030 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 | - |
| TP321 | ≤0.08 | 2.00-2.50 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | - | - |
| TP347 | ≤0.08 | 2.00-2.50 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | - | - |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HRB) |
| TP304L | ≥ 205 | 515-720 | ≥ 40 | ≤ 90 |
| TP316L | ≥ 205 | 515-720 | ≥ 40 | ≤ 90 |
| TP317L | ≥ 205 | 515-720 | ≥ 40 | ≤ 90 |
| TP321 | ≥ 205 | 515-720 | ≥ 40 | ≤ 90 |
| TP347 | ≥ 205 | 515-720 | ≥ 40 | ≤ 90 |
Applications
The austenitic stainless steel grades specified in ASTM A778 are widely used in the medical industry due to their excellent corrosion resistance and mechanical properties. Common applications include:
- Medical Devices: Surgical instruments, implants, and other medical apparatus.
- Pharmaceutical Equipment: Components that require high purity and resistance to corrosion.
- Biotechnology: Equipment used in the production and handling of biological materials.
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trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
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The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
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ASTM A778 TP304L Precision Stainless Steel Tubing Welded Unannealed Austenitic Stainless Steel Tubular For Medical Images
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