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Stainless Steel 317L Round Bar is a low-carbon, molybdenum-bearing austenitic stainless steel designed for superior corrosion resistance. It offers enhanced protection against chemical attack, especially in acidic and chloride-rich environments. Stainless Steel 317L Round Bar provides greater strength and oxidation resistance compared to 316L stainless steel. Its low carbon content minimizes the risk of carbide precipitation during welding, maintaining excellent intergranular corrosion resistance. This makes it ideal for applications requiring high purity, durability, and long service life.
The chemical composition of Stainless Steel 317L Round Bar includes high levels of chromium, nickel, and molybdenum, which significantly improve its resistance to pitting and crevice corrosion. The presence of molybdenum enhances performance in reducing environments containing sulfuric, hydrochloric, and phosphoric acids. Stainless Steel 317L Round Bar performs exceptionally well in marine and chemical processing applications. It resists corrosion in both oxidizing and reducing conditions. This alloy provides consistent performance under tough chemical exposure and fluctuating temperatures.
Stainless Steel 317L Round Bar exhibits excellent mechanical strength, ductility, and toughness, even at elevated temperatures. Its high tensile and yield strength make it suitable for pressure and high-stress applications. The alloy retains its mechanical properties under continuous heat exposure and resists oxidation up to 870°C. Stainless Steel 317L Round Bar can be easily fabricated, welded, and machined without compromising its corrosion resistance. These qualities make it highly versatile for various industrial applications, including piping systems and reactor components.
One of the key features of Stainless Steel 317L Round Bar is its superior resistance to localized corrosion forms such as pitting, crevice attack, and stress corrosion cracking. It performs effectively in chloride-bearing environments, making it suitable for marine and offshore applications. The alloy also exhibits good resistance to chemical acids found in paper, textile, and pharmaceutical industries. Stainless Steel 317L Round Bar’s combination of low carbon and high molybdenum ensures outstanding structural stability. It maintains long-term performance in both high and low temperatures.
Stainless Steel 317L Round Bar offers excellent weldability and can be welded using standard fusion and resistance welding techniques. Post-weld annealing is generally not required due to its low carbon content, which prevents carbide precipitation. The alloy can also be easily machined and cold-worked to achieve desired mechanical properties. Stainless Steel 317L Round Bar delivers superior surface finish and dimensional accuracy, making it suitable for precision-engineered components. It is available in multiple sizes and finishes to meet diverse industrial requirements.
Applications of Stainless Steel 317L Round Bar span across industries such as chemical processing, pulp and paper, marine, food processing, and pollution control. It is frequently used in heat exchangers, condensers, evaporators, and pressure vessels. The alloy’s ability to resist acid corrosion and scaling makes it ideal for environments involving aggressive chemical exposure. Stainless Steel 317L Round Bar provides reliable service under mechanical stress and thermal cycling. Its combination of strength and corrosion resistance ensures long-term efficiency and performance.
In conclusion, Stainless Steel 317L Round Bar is a premium alloy offering exceptional corrosion resistance, high strength, and superior weldability. Its low carbon and high molybdenum composition make it ideal for demanding chemical and marine environments. Stainless Steel 317L Round Bar ensures durability, longevity, and minimal maintenance, even under extreme operating conditions. It provides engineers with a dependable solution for high-performance applications. Overall, this alloy stands out as a cost-effective and durable material for modern industrial needs.
Specification Table
| Property | Specification / Range |
|---|---|
| Grade | 317L |
| Standard | ASTM A276, ASTM A479, EN 10088 |
| Form | Round, Bar |
| Diameter / Size Range | 6 mm to 200 mm (custom sizes available) |
| Length | 1 m to 6 m (custom length available) |
| Surface Finish | Hot Rolled (HR), Cold Drawn (CD), Polished |
| Type | Seamless / Welded |
| Application | Chemical processing, Marine, Food processing, Pharmaceutical, Industrial piping |
| Corrosion Resistance | High resistance to chloride and acidic environments |
Chemical Composition (Typical ranges for SS317L)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 18 – 20 |
| Nickel (Ni) | 11 – 14 |
| Molybdenum (Mo) | 3 – 4 |
| Manganese (Mn) | ≤ 2 |
| Silicon (Si) | ≤ 1 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | SS 316 | SS 316L |
|---|---|---|
| Tensile Strength (MPa) | 515–720 | 485–690 |
| Yield Strength (0.2% Proof, MPa) | 205–290 | 170–280 |
| Elongation (%) | 40 min | 40 min |
| Hardness (Brinell, HB) | 217 max | 217 max |
| Modulus of Elasticity (GPa) | 193 | 193 |
| Density (g/cm³) | 8.0 | 8.0 |
| Impact Strength (Charpy V-notch, J) | 75 min | 75 min |
Equivalent Grades
| Standard | SS 316 | SS 316L |
|---|---|---|
| ASTM / ASME | A276 / A479 | A276 / A479 |
| EN (European Standard) | 1.4401 | 1.4404 |
| JIS (Japanese Standard) | SUS 316 | SUS 316L |
| DIN (German Standard) | X5CrNiMo17-12-2 | X2CrNiMo17-12-2 |
| GB / Chinese Standard | 0Cr17Ni12Mo2 | 00Cr17Ni14Mo2 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Diameter (mm) | Weight per Meter (kg/m) | Diameter (inch) | Weight per Foot (lbs/ft) |
|---|---|---|---|
| 6 | 0.22 | 1/4" | 0.15 |
| 8 | 0.39 | 5/16" | 0.26 |
| 10 | 0.62 | 3/8" | 0.42 |
| 12 | 0.89 | 1/2" | 0.60 |
| 16 | 1.58 | 5/8" | 1.07 |
| 20 | 2.47 | 3/4" | 1.68 |
| 25 | 3.85 | 1" | 2.62 |
| 32 | 6.31 | 1 1/4" | 4.30 |
| 40 | 9.86 | 1 1/2" | 6.72 |
| 50 | 15.4 | 2" | 10.5 |
| 65 | 25.1 | 2 1/2" | 17.2 |
| 80 | 39.0 | 3" | 26.7 |
| 100 | 61.0 | 4" | 41.8 |
| 125 | 95.0 | 5" | 65.0 |
Types Of 317L Round Bars and Tubes
Stainless Steel Round Bar
Monel 400 K400 Round Bar
Hastelloy Round Bar
Inconel 600 Round Bar
Nickel Alloy Round Bar
Super Duplex Round Bar
Monel K500 Round Bar
Inconel 625 Round Bar
Frequently Asked Questions (FAQ)
What is Stainless Steel 317L?
Stainless Steel 317L is a low-carbon austenitic stainless steel with high corrosion resistance, particularly against chlorides and acidic environments. It is an improved version of SS 316L with higher molybdenum content for superior resistance.
What are the common applications of SS 317L Round & Bar?
SS 317L Round & Bar is used in chemical processing, marine environments, pharmaceutical equipment, food processing, and industrial piping systems due to its high corrosion resistance.
What are the standard sizes available?
SS 317L Round & Bar is available in diameters ranging from 6 mm to 200 mm, with lengths typically from 1 m to 6 m. Custom sizes and lengths can also be provided on request.
What standards does SS 317L conform to?
Common standards include ASTM A276, ASTM A479, and EN 10088, ensuring quality, chemical composition, and mechanical properties for industrial applications.
What is the chemical composition of SS 317L?
SS 317L contains 18–20% Chromium, 11–14% Nickel, 3–4% Molybdenum, ≤0.03% Carbon, and trace amounts of manganese, silicon, phosphorus, and sulfur. Iron makes up the balance.
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