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ASTM A269 / ASME SA269 TP316L Polished 320 Grit Bright Annealed Stainless Steel Tube
Bright Annealing is a process in which the stainless steel surface is made
reflective like a mirror. This type of Annealing is produced by
heat-treating steel with a controlled atmosphere furnace. ASTM A269
can be buffed to attain a better reflective finish and is used in
reflective surface requiring applications. It should be taken into
consideration that during Bright Annealing it is necessary for the
metal surfaces to be clean and free from foreign contamination for
maximum effect. SS 316L Tubes is an improved version of Alloy 304, with the addition of
molybdenum and slightly higher nickel content. The resultant
composition of AISI 316L Tubes gives the steel much increased
corrosion resistance in many aggressive environments.
Bright Annealing Process of Stainless Steel Tube: Bright annealing is a critical production process. If proper
annealing is not done tube surface can crack, stained and may lead
to easy corrosion. In this process the stainless tube is heated to
high temperatures in presence of inert gases. Annealing is done to
reduce the hardness of the steel to attain ductility for further
processing.
Specifications
ASTM A269/A269M-15a(2019) Standard Specification for Seamless and
Welded Austenitic Stainless Steel Tubing for General Service
| Specifications | ASTM A/ASME SA213/A249/A269/A312/A358 CL |
| Dimensions | ASTM, ASME and API |
| Schedule | SCH 10, SCH20, SCH30, SCH40, STD, SCH60, XS, SCH80, SCH120, SCH140, SCH160, XXS |
| Wall Thickness | Schedule 5S - Schedule XXS. |
| Size - Seamless 316L Pipes & Tubes | 1/2"NB - 24"NB |
| ERW 316L Pipes & Tubes | 1/2"NB - 24"NB |
| EFW 316L Pipes & Tubes | 6"NB - 100"NB |
| Length | Single Random, Double Random & Cut Length |
| Types | Seamless / ERW / Welded / Fabricated / Pipes |
| Form | Round, Square, Rectangular, Hydraulic Etc |
SS 316L Pipes & Tubes Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 316L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 - 18.00 | 2.00 - 3.00 | 10.00 - 14.00 | 68.89 min |
Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1399 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Applications
1. Food industry
2. chloride environments
3. Fasteners
4. Pharmaceuticals
5. Marine applications
6. Architectural applications
7. Medical implants which comprise pins, screws and orthopedic
implants like total hip and knee replacements.
Normal Tests
