_proc.webp)
stainless-steel-bright-annealed-tube
High-Performance Bright Annealed (BA) Tubing Solutions | GAOLIN TECH
1.Premium Quality & Manufacturing Excellence
At GAOLIN TECH, we specialize in the production of high-precision Bright Annealed (BA) Tubing. Our commitment to excellence begins at the source: we strictly control the quality of raw materials from world-class Tier-1 mills. Every tube is processed through advanced cold-drawing and bright annealing technologies to ensure a mirror-like finish, superior internal cleanliness, and precise dimensional tolerances.
2.Rigorous Quality Control
We adhere to a "Zero-Defect" philosophy. All products undergo 100% non-destructive testing, including:
● Eddy Current Testing & Ultrasonic Testing
● Hydrostatic Pressure Testing
● Intergranular Corrosion Testing (ASTM G28/A262)
● Precise Dimensional & Surface Roughness Inspection (Ra ≤0.4)
3.Technical Specifications: Material Grade & Properties
Material Grade | UNS | C (max) | Si (max) | Mn (max) | P (max) | S (max) | Cr | Ni | Mo | Others |
304 | S30400 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | — | — |
304L | S30403 | 0.035 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | — |
316L | S31603 | 0.035 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | — |
321 | S32100 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | Ti: 5x(C+N)-0.70 |
347H | S34709 | 0.04-0.10 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-13.0 | — | Nb: 8xC-1.10 |
310S | S31008 | 0.08 | 1.50 | 2.00 | 0.045 | 0.030 | 24.0-26.0 | 19.0-22.0 | — | — |
316Ti | S31635 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | Ti: 5x(C+N)-0.70 |
S31803 | S31803 | 0.03 | 1.00 | 2.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | N: 0.08-0.20 |
S32205 | S32205 | 0.03 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | N: 0.14-0.20 |
S32750 | S32750 | 0.03 | 0.80 | 1.20 | 0.035 | 0.020 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | N: 0.24-0.32, Cu: 0.5 |
Alloy 400 | N04400 | 0.3 | 0.5 | 2.0 | — | 0.024 | — | 63.0 min | — | Cu: 28.0-34.0, Fe: 2.5 |
Alloy 625 | N06625 | 0.10 | 0.5 | 0.5 | 0.015 | 0.015 | 20.0-23.0 | 58.0 min | 8.0-10.0 | Nb+Ta: 3.15-4.15 |
Alloy 800 | N08800 | 0.10 | 1.0 | 1.5 | 0.045 | 0.015 | 19.0-23.0 | 30.0-35.0 | — | Al: 0.15-0.60, Ti: 0.15-0.60 |
Alloy 825 | N08825 | 0.05 | 0.5 | 1.0 | — | 0.03 | 19.5-23.5 | 38.0-46.0 | 2.5-3.5 | Cu: 1.5-3.0, Ti: 0.6-1.2 |
Alloy C276 | N10276 | 0.01 | 0.08 | 1.0 | 0.04 | 0.03 | 14.5-16.5 | Base | 15.0-17.0 | W: 3.0-4.5, V: 0.35 |
Material Category | Tensile Strength (Rm MPa) | Yield Strength (Rp 0.2 MPa) | Elongation (A5 %) | Hardness (Max) | ||||||
Austenitic (304, 316L, 321, 347H) | ≥515 / 485 | ≥205 / 170 | ≥35 | 90 HRB / 192 HBW | ||||||
High Temp (310S) | ≥515 | ≥205 | ≥35 | 90 HRB | ||||||
Duplex (S31803 / S32205) | ≥620 | ≥450 | ≥25 | 290 HBW | ||||||
Super Duplex (S32750) | ≥800 | ≥550 | ≥15 | 32 HRC / 310 HBW | ||||||
Alloy 400 | ≥480 | ≥195 | ≥35 | 75 HRB | ||||||
Alloy 625 (Grade 1) | ≥827 | ≥414 | ≥30 | 25 HRC / 288 HBW | ||||||
Alloy 800 | ≥520 | ≥205 | ≥30 | 80 HRB | ||||||
Alloy 825 | ≥585 | ≥240 | ≥30 | 85 HRB | ||||||
Alloy C276 | ≥690 | ≥283 | ≥40 | 100 HRB | ||||||
4.Supply Advantage & Rapid Dispatch
● Extensive Raw Material Stock: We maintain a massive inventory of raw materials for all grades mentioned above.
● Lead Time: While the market average is 10-12 weeks, GAOLIN TECH delivers in 2-4 weeks for standard specifications.
5. Industry Applications
Our tubing is engineered for critical service in:
● Instrumentation & Control Systems
● Shipbuilding & Offshore Engineering
● High-End Heat Exchangers & Condensers
● Hydraulic & Pneumatic Systems
