After 304, Type 316 the most common stainless steel on the market. Again it is an austenitic grade with the addition of 2-3% molybdenum which further improves corrosion resistance. It is often referred to as a marine grade stainless steel because of its effective resistance to chloride corrosion in comparison to other stainless steel grades. As an experts in the tube fitting manufacturing field with over 20 years of experience, Gautam Steel offers a wide range of Round Pipes & Tubes, Coil, ‘U’ Shape tubes, Square pipes & tubes, Rectangular tubes, ASTM A312 TP 316L Stainless Steel Seamless Pipe, 316 Seamless Tubing, 316 Seamless Pipe, ss 316l Seamless Pipe, 304 Seamless Tube, 304 Seamless Stainless Steel Tubing & Hydraulic Tube etc. Close relationships with all of the top mill producing stainless steel pipes give us greater control over delivery schedules and custom orders. Our all ASTM A312 TP 316L Stainless Steel Seamless Pipe are tested in accordance to internationally recognized standards or our own more stringent internal test procedures, which is developed considering the harsh field conditions. In addition to this we also offer specific testing to our client’s requirement.
We can meet most ASME, ASTM, and other specifications, and can cross-reference to most international standards, including full 3.1/3.2 Certifcation and NACE requirements. In order to guarantee these standards, we are certified in accordance with the strict guidelines of ISO 9001:2008.
ASTM A312 TP 316L Stainless Steel Seamless Pipe Dimensional Range & Specification
Product Range
316 & 316L steel plate and pipes have common properties and are often stocked with Dual Certification, where it is determined that both have properties and composition which comply with both steel types.
Type 316H is excluded from this scenario by virtue of the fact that unlike 316 & 316L, 316H is engineered to work in elevated working temperatures.
Product Range
Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
Sizes (Seamless): 1/2" NB – 24" NB
Sizes (ERW): 1/2" NB – 24" NB
Sizes (EFW): 6" NB – 100" NB
Wall Thickness available:
Schedule 5S – Schedule XXS (heavier on request)
Pipes (Seamless & Welded)
| Product Name | ASTM A312 TP 316L Stainless Steel Seamless Pipe |
| Range | 6NB to 1200NB – SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS. |
| Type | Round, Square, Rectangle, Hydraulic, Honed Tubes |
Materials of Construction
| Stainless Steel | ASTM A312, A358, A269, A270- TP304, 304L, 304H, 316, 316L, 316H, 316Ti, 309, 310, 317L, 321, 347, 904L. |
| TEST CERTIFICATES | MTC, IBR & Third Party Inspection |
ASTM A312 TP 316L Stainless Steel Seamless Pipe Available Size
Please contact us to check availability of size.
| Pipe Tube Type | NB Sizes | Sch 5 | Sch 10 | Sch 40 | Sch 80 | Sch 160 |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 1/8″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 1/4″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 3/8″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 1/2″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 3/4″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 1″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 1 1/4″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 1 1/2″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 2″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 2 1/2″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 3″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 4″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 5″ | | | | | |
| ASTM A312 TP 316L Stainless Steel Seamless Pipe | 6″ | | | | | |
- 0.375" NOM. (0.675" OD X 0.091" WALL X 0.493" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 0.5" NOM. (0.84" OD X 0.11" WALL X 0.622" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 1" NOM. (1.312" OD X 0.13" WALL X 1.049" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 1.25" NOM. (1.66" OD X 0.14" WALL X 1.38" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 1.5" NOM. (1.9" OD X 0.145" WALL X 1.61" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 2" NOM. (2.38" OD X 0.15" WALL X 2.067" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 2.5" NOM. (2.875" OD X 0.203" WALL X 2.469" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 3" NOM. (3.5" OD X 0.216" WALL X 3.068" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 3.5" NOM. (4" OD X 0.226" WALL X 3.548" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 4" NOM. (4.5" OD X 0.237" WALL X 4.026" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 5" NOM. (5.563" OD X 0.258" WALL X 5.047" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 6" NOM. (6.625" OD X 0.28" WALL X 6.065" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
- 8" NOM. (8.625" OD X 0.322" WALL X 7.981" ID) STAINLESS T-316/316L WELDED PIPE SCHEDULE 40
SS 316L
An austenitic stainless steel with 2% to 3% Molybdenum which improves corrosion resistance against halogens and imparts hot strength characteristics. Used for applications requiring resistance to pitting corrosion and in halogen atmospheres.
Application: Marine Exteriors, Chemical Processing equipment, Food processing equipment, Petroleum refining , pharmaceutical , Pulp & Paper Industries.
Background of 316L Stainless Steel Pipes and Tubes
Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It has excellent forming and welding characteristics. It is readily brake or roll formed into a variety of parts for applications in the industrial, architectural, and transportation fields. Grade 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
Grade 316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). Grade 316H, with its higher carbon content has application at elevated temperatures, as does stabilised grade 316Ti.
The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Specifications
| Stainless Steel [SS] 316 / 316H / 316 L / 316N / 316Ti |
| AISI | 316 / 316H / 316 L / 316N / 316Ti |
| UNS | S31600 / S31609 / S31603 / S31651 / S31635 |
| Werkstoff Nr. | 1.4401 / 1.4404 / 1.4432 / 1.4435 / 1.4429 / 1.4571 |
Composition of 316L Stainless Steel Pipes and Tubes
Table 1. Composition ranges for 316L grade of stainless steels.
| Grade | | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 316 | Min | – | – | – | 0 | – | 16.0 | 2.00 | 10.0 | – |
| Max | 0.08 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 |
| 316L | Min | – | – | – | – | – | 16.0 | 2.00 | 10.0 | – |
| Max | 0.03 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 |
| 316H | Min | 0.04 | 0.04 | 0 | – | – | 16.0 | 2.00 | 10.0 | – |
| max | 0.10 | 0.10 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | – |
Mechanical Properties of 316L Stainless Steel Pipes & Tubes
Table 2. Mechanical properties of 316L grade stainless steels.
| Grade | Tensile Str
(MPa) min | Yield Str
0.2% Proof
(MPa) min | Elong
(% in 50mm) min | Hardness |
| Rockwell B (HR B) max | Brinell (HB) max |
| 316 | 515 | 205 | 40 | 95 | 217 |
| 316L | 485 | 170 | 40 | 95 | 217 |
| 316H | 515 | 205 | 40 | 95 | 217 |
Note: 316H also has a requirement for a grain size of ASTM no. 7 or coarser.
Physical Properties of 316L Stainless Steel Pipes & Tubes
Table 3. Typical physical properties for 316L grade stainless steels.
| Grade | Density
(kg/m3) | Elastic Modulus
(GPa) | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity
(W/m.K) | Specific Heat 0-100°C
(J/kg.K) | Elec Resistivity
(nΩ.m) |
| 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 |
Grade Specification Comparison of 316L Stainless Steel Pipes & Tubes
Table 4. Grade specifications for 316L grade stainless steels.
| Grade | UNS
No | Old British | Euronorm | Swedish
SS | Japanese
JIS |
| BS | En | No | Name |
| 316 | S31600 | 316S31 | 58H, 58J | 1.4401 | X5CrNiMo17-12-2 | 2347 | SUS 316 |
| 316L | S31603 | 316S11 | – | 1.4404 | X2CrNiMo17-12-2 | 2348 | SUS 316L |
| 316H | S31609 | 316S51 | – | – | – | – | – |
Note: These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
Corrosion Resistance of 316L Stainless Steel Pipes & Tubes
Excellent in a range of atmospheric environments and many corrosive media – generally more resistant than 304. Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 60°C. Considered resistant to potable water with up to about 1000mg/L chlorides at ambient temperatures, reducing to about 500mg/L at 60°C.
316 is usually regarded as the standard “marine grade stainless steel", but it is not resistant to warm sea water. In many marine environments 316 does exhibit surface corrosion, usually visible as brown staining. This is particularly associated with crevices and rough surface finish.
Heat Treatment of 316L Stainless Steel Pipes & Tubes
Solution Treatment (Annealing) – Heat to 1010-1120°C and cool rapidly. These grades cannot be hardened by thermal treatment.
ASTM A312 TP 316L Stainless Steel Seamless Pipe Test Certificate
Product Name: ASTM A312 TP 316L Stainless Steel Seamless Pipe
Manufacturer Test Certificate
IBR Test Certificate (Form III-D)
Laboratory Test Certificate from Govt. Approved Lab.
Under Third Party Inspection with Excise Gate Pass to avail
Modvat benefit.
ASTM A312 TP 316L Stainless Steel Seamless Pipe Value Added Service
- Draw & Expansion as per required Size & Length
- Polish (Electro & Commercial) Heat Treatment
- Bending
- Annealed & Pickled
- Sand Blasting
- Machining Etc.
ASTM A312 TP 316L Stainless Steel Seamless Pipe Advantages
- High strength
- Resistant to high mechanical stresses
- Resistant to high pressure
- Resistant to high temperature
- Good formability
- Reusable
