Overview
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. The molybdenum makes Type 316L Pipes more resistant to pitting and crevice corrosion in chloride-contaminated media, sea water and acetic acid vapours. The lower rate of general corrosion in mildly corrosive environments gives Type 316L Tubes good atmospheric corrosion resistance in polluted marine atmospheres.
It is the preferred steel for use in marine environments because of its greater resistance to pitting corrosion than other grades of steel. The fact that it is negligibly responsive to magnetic fields means that it can be used in applications where a non-magnetic metal is required. In addition to molybdenum, 316 also contains a number of other elements in varying concentrations. Like other grades of stainless steel, marine grade stainless steel is a relatively poor conductor of both heat and of electricity when compared to metals and other conductive materials.
Specification
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 | S31603 | SUS 316L | 316S11 | 03Ch17N14M3 | Z3CND17‐11‐02 | 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 | Elongation |
8.0 g/cm3 | 1399 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Physical Properties
|
|
| Mean Co-eff of | Thermal Conductivity |
|
| |||
0-100°C | 0-315°C | 0-538°C | At 100°C | At 500°C | |||||
316/L/H | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 740 |
Applications
Food preparation equipment particularly in:
1. chloride environments
2. Fasteners
3. Pharmaceuticals
4. Marine applications
5. Architectural applications
6. Medical implants which comprise pins, screws and orthopedic implants like total hip and knee replacements.
Industries predominantly using:
1. Chemical processing
2. Oil and gas
3. High Performance
