ASTM A312 Seamless 316L Stainless Steel Pipe Corrosion Resistant For Chemical And Marine Applications
Product Details
316H Stainless Steel Welded Pipe
,316L Stainless Steel Welded Pipe
,Stainless Steel Weld Pipe ASTM A213
ASTM A312 Seamless 316L Stainless Steel Pipe Corrosion Resistant For Chemical And Marine Applications
Standard: ASTM A312
Grade: 316L
OD: 6 - 630mm
WT: 0.5–40 mm
Length: 5.8 m / 6 m / 11.8 m / 12 m
Custom Sizes: Available upon request
| Specification | Details |
|---|---|
| Product Name | 316L Seamless Stainless Steel Pipe |
| Standard | ASTM A312 / ASME SA312 |
| Grade | 316L |
| UNS | S31603 |
| Material Type | Austenitic Stainless Steel |
| Manufacturing Process | Seamless |
| Outside Diameter (OD) | 6–630 mm |
| Wall Thickness | 0.5–40 mm |
| Length | 5.8 m, 6 m, 11.8 m, 12 m; Custom Lengths Available |
| Schedule | SCH 5S, 10S, 40S, 80S, 160S, XXS; Custom Available |
| Surface Finish | Pickled & Annealed; Bright Annealed Available |
| Pipe Ends | Plain End, Beveled End, Threaded End |
| Heat Treatment | Solution Annealed |
| Tolerance | According to ASTM A312 |
| Testing | Hydrostatic / Nondestructive Testing as Applicable |
| Inspection | Dimensional, Surface, Chemical & Mechanical Testing |
| MTC | EN 10204 3.1 Certificate Available |
| Protective Packaging | Plastic Caps, PVC Film, Bundles, Export Packaging |
| Customization | OD, Wall Thickness, Length & End Finish Available |
| Main Applications | Chemical Processing, Marine Engineering, Petrochemical, Seawater Systems, Heat Exchangers |
316L stainless steel welded pipe, sometimes referred to as A4 stainless steel or marine grade stainless steel, is the second most common austenitic stainless steel pipe after 304/A2 stainless steel. Its primary alloying constituents after iron are chromium (between 16-18%), nickel (10-12%), and molybdenum (2-3%), with small quantities of silicon, phosphorus & sulfur also present.
The addition of molybdenum provides greater corrosion resistance than 304, with respect to localized corrosive attack by chlorides and to general corrosion by reducing acids, such as sulfuric acid. 316L grade is the low carbon version of 316 stainless steel. When cold worked, 316 can produce high yield and tensile strengths similar to Duplex stainless grades.
It is commonly used in the chemical and petrochemical industry, in food processing, pharmaceutical equipment, medical devices, potable water, wastewater treatment, marine applications, and architectural applications near the seashore or in urban areas.
Common Size Range of 316L Stainless Steel Tube| Nominal Pipe Size | Typical OD |
|---|---|
| 1/2" | 21.3 mm |
| 1" | 33.4 mm |
| 1-1/2" | 48.3 mm |
| 2" | 60.3 mm |
| 3" | 88.9 mm |
| 4" | 114.3 mm |
| 6" | 168.3 mm |
| 8" | 219.1 mm |
| 10" | 273.1 mm |
| 12" | 323.9 mm |
| 16" | 406.4 mm |
| 20" | 508.0 mm |
| 24" | 609.6 mm |
316L stainless steel is an austenitic stainless steel with low carbon content. According to ASTM A312 / ASME SA312, the typical chemical composition requirements are:
| Element | Composition (wt. %) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.0–18.0 |
| Nickel (Ni) | 10.0–14.0 |
| Molybdenum (Mo) | 2.0–3.0 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
| Property | Typical Value |
|---|---|
| Material | 316L / UNS S31603 |
| Material Type | Austenitic Stainless Steel |
| Density | ~8.00 g/cm³ |
| Melting Range | ~1375–1400°C |
| Elastic Modulus | ~193 GPa |
| Poisson's Ratio | ~0.30 |
| Thermal Conductivity | ~16.3 W/m·K at 100°C |
| Specific Heat Capacity | ~500 J/kg·K |
| Electrical Resistivity | ~0.74 μΩ·m at 20°C |
| Coefficient of Thermal Expansion | ~15.9 × 10⁻⁶ /K (20–100°C) |
| Magnetic Property | Generally non-magnetic in annealed condition |
| Crystal Structure | Face-Centered Cubic (FCC), Austenitic |
According to ASTM A312 / ASME SA312, the typical minimum mechanical requirements for 316L stainless steel pipe (UNS S31603) are:
| Property | Requirement |
|---|---|
| Tensile Strength | ≥ 485 MPa |
| Yield Strength (0.2% Offset) | ≥ 170 MPa |
| Elongation | ≥ 35% |
| Hardness, Brinell | ≤ 217 HB |
| Hardness, Rockwell B | ≤ 95 HRB |
- Chemical industry: Used to manufacture chemical equipment, pipelines, storage tanks, etc., such as reactors, heat exchangers, towers, etc., and can withstand the effects of various corrosive media.
- Marine engineering: Widely used in offshore platforms, submarine pipelines, seawater desalination devices and other fields, resisting seawater corrosion and harsh conditions of the marine environment.
- Food processing: Suitable for food processing equipment, transportation pipelines, containers, etc. to ensure the safety and hygiene of food.
- Medical industry: Used to manufacture medical devices, implants, etc., with good biocompatibility and corrosion resistance.
- Architectural decoration: Can be used for decoration, railings, handrails, etc. of high-end buildings, beautiful, durable and corrosion-resistant.
, ,
Difference Between 316L Seamless, 316L Welded and 316H Welded Stainless Steel PipesThe three products mainly differ in manufacturing process, carbon content, high-temperature performance, and application positioning.
Feature 316L Seamless Pipe 316L Welded Pipe 316H Welded Pipe Grade 316L / S31603 316L / S31603 316H / S31609 Manufacturing Seamless Welded Welded Carbon ≤0.030% ≤0.030% 0.04–0.10% Weld Seam None Yes Yes Corrosion Resistance Excellent Excellent Excellent Weldability Excellent Excellent Good High-Temperature Strength Good Good Better Sensitization Resistance Excellent Excellent Lower than 316L Cost Higher Lower Medium–High Typical Standard ASTM A312 ASTM A312 ASTM A312 / A358 depending on product Main Applications Chemical, high-pressure piping, marine grade 316L steel pipe Chemical, water, process piping High-temperature & pressure service
ASTM A312 316L seamless stainless steel pipe is an austenitic stainless steel pipe manufactured without a welded seam, typically supplied in accordance with ASTM A312 / ASME SA312. It is widely used for corrosive and demanding industrial services.
2. What is the UNS number for 316L stainless steel?The UNS designation for 316L is UNS S31603.
3. Why is 316L suitable for chemical applications?316L contains chromium, nickel, and 2–3% molybdenum, providing excellent resistance to general corrosion, pitting, and crevice corrosion. Its low carbon content also provides good resistance to sensitization after welding.
4. Is 316L suitable for marine applications?Yes. 316L provides significantly better chloride and seawater corrosion resistance than 304 stainless steel, making it suitable for many marine and coastal applications.
However, continuously immersed or highly aggressive seawater environments may require Duplex 2205 or higher-alloy materials.
5. What is the difference between 316 and 316L?The main difference is carbon content:
- 316: C ≤ 0.08%
- 316L: C ≤ 0.030%
The lower carbon content of 316L makes it particularly suitable for welded piping systems.
6. Is ASTM A312 316L pipe seamless?Yes. ASTM A312 covers seamless, welded, and heavily cold-worked austenitic stainless steel pipes. When specified as 316L seamless pipe, the pipe is manufactured without a longitudinal welded seam.
7. What sizes are available?Typical supply ranges can include:
- OD: 6–630 mm
- Wall Thickness: 0.5–40 mm
- Length: 5.8 m, 6 m, 11.8 m, 12 m
- Custom Sizes: Available
Actual available combinations depend on the manufacturing process and applicable dimensional requirements.
8. What surface finishes are available?Common finishes include:
- Pickled & Annealed
- Bright Annealed
- Polished
- Mechanical Polished
The appropriate finish depends on the application and customer requirements.
9. Can 316L seamless pipe be welded?Yes. 316L has excellent weldability and is widely used in welded piping systems. Its low carbon content helps reduce the risk of carbide precipitation during welding.
10. What industries use 316L seamless stainless steel pipe?Common applications include:
- Chemical Processing
- Marine Engineering
- Petrochemical Industry
- Seawater Systems
- Pharmaceutical Equipment
- Food Processing
- Heat Exchangers
- Corrosive Fluid Piping
- Offshore Equipment
316L is generally non-magnetic in the annealed condition. However, some magnetism may develop after significant cold working.
12. Why choose 316L seamless pipe instead of 304L?316L contains molybdenum, giving it superior resistance to chloride-induced pitting and crevice corrosion compared with 304L. It is therefore preferable for many chemical, marine, coastal, and chloride-containing environments.
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JThe TP316L seamless pipes were delivered with complete EN 10204 3.1 material certificates and passed all our incoming inspections. Excellent corrosion resistance and reliable quality make this supplier one of our preferred partners.
Mr. Deng
- Email: judesteel@juqing.hk
- Tel: 86-19033681875
- WhatsApp: 8619033681875
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ASTM A312 Seamless 316L Stainless Steel Pipe Corrosion Resistant For Chemical And Marine Applications
316L stainless steel pipes offer superior corrosion resistance, especially against chlorides. Available in seamless types per ASTM standards, with custom sizes & fast delivery. Ideal for chemical, marine & food industries.
