TP304 / TP316L Bright Annealed Stainless Steel Tube Custom Sizes
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
Bright annealed stainless steel tube is manufactured through a specialized heat treatment process performed in a controlled atmosphere furnace (hydrogen or vacuum). This process produces a clean, oxide-free, bright surface without the need for pickling or post-treatment. The result is a tube with excellent surface finish, improved corrosion resistance, and superior mechanical properties.
Key Features:
- Oxide-free, bright surface finish (Ra ≤ 0.4μm)
- No pickling required – environmentally friendly
- Improved corrosion resistance due to passive layer formation
- Uniform microstructure and mechanical properties
- Excellent for bending, flaring, and welding
- Available in seamless or welded construction
Product Specifications
| Parameter | Details |
|---|---|
| Applicable Standards | ASTM A213, ASTM A269, EN 10216-5, EN 10305-1, JIS G3459 |
| Common Grades | TP304 / 304L, TP316 / 316L, TP321, TP310S, Duplex 2205 |
| OD Range | 1.6mm – 101.6mm (1/16″ to 4″) |
| Wall Thickness Range | 0.5mm – 6mm |
| Length | Up to 12m straight lengths, or coils |
| Construction Type | Seamless (SMLS) or Welded & Drawn (W&D) |
| Process | Cold drawn / Cold rolled → Bright annealing (H₂ or vacuum furnace) |
| Surface Finish | Bright annealed (mirror-like, oxide-free) |
| Surface Roughness | Ra ≤ 0.4μm (customizable to Ra ≤ 0.2μm) |
| Delivery Condition | Bright annealed – ready for use |
Chemical Composition (Typical, %)
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| TP304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-11.0 | – |
| TP304L | ≤0.035 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-12.0 | – |
| TP316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| TP316L | ≤0.035 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| TP321 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | – |
Full mill test reports (MTR) available for all grades.
Mechanical Properties (Bright Annealed Condition)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRB / HV) |
|---|---|---|---|---|
| TP304 | ≥515 | ≥205 | ≥35 | ≤90 HRB |
| TP304L | ≥485 | ≥170 | ≥35 | ≤90 HRB |
| TP316 | ≥515 | ≥205 | ≥35 | ≤90 HRB |
| TP316L | ≥485 | ≥170 | ≥35 | ≤90 HRB |
| TP321 | ≥515 | ≥205 | ≥35 | ≤90 HRB |
Bright Annealing vs. Conventional Annealing
| Property | Bright Annealing | Conventional Annealing + Pickling |
|---|---|---|
| Surface Finish | Mirror-like, oxide-free | Matte, may have scale |
| Corrosion Resistance | Excellent (passive layer intact) | Good (pickling restores passive layer) |
| Post-treatment | None required | Pickling and/or passivation |
| Environmental Impact | Low (no acid bath) | Higher (acid waste disposal) |
| Cost | Higher initial, lower overall | Lower initial, higher post-treatment |
| Aesthetic Quality | Superior | Standard |
Applications
Bright annealed stainless steel tubes are preferred in industries requiring clean, smooth, and aesthetically pleasing surfaces:
| Industry | Typical Uses | Why Bright Annealed? |
|---|---|---|
| Food & Beverage | Hygienic process lines, dairy equipment | Cleanable, bacteria-resistant surface |
| Pharmaceutical | WFI (water for injection) systems, clean steam lines | No contamination, easy sterilization |
| Medical Devices | Surgical instruments, endoscope tubing | Smooth surface, biocompatible |
| Semiconductor | Ultra-high purity gas lines | Particle-free, oxide-free surface |
| Instrumentation | Pressure gauges, analytical equipment | Aesthetic, corrosion resistant |
| Aerospace | Hydraulic and fuel lines | Reliable, clean, and uniform |
| Automotive | Fuel injection rails, sensor housings | Precision fit, smooth finish |
| Architecture & Decorative | Handrails, furniture, structural elements | Attractive mirror finish |
Why Choose Bright Annealed Stainless Steel Tube?
| Advantage | Benefit |
|---|---|
| Oxide-free surface | No contamination in sensitive processes |
| Excellent corrosion resistance | Longer service life |
| Smooth finish (Ra ≤ 0.4μm) | Easy to clean and sterilize |
| No pickling required | Environmentally friendly, faster delivery |
| Uniform mechanical properties | Consistent performance in fabrication |
| Ready-to-use condition | No additional surface treatment needed |
| Superior aesthetic appeal | Ideal for visible applications |
Contact Us
For samples, mill test reports (MTR), surface finish samples, or a custom quote, please contact us.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Shanxi Zhongcheng Metal Co., Ltd.
Location
Room 2, No. 221 Tianzhang Avenue, Fengdong New City, Xi'an, Shaanxi Province
Contact Person
Zhongcheng Metal