Lakshya International is the most reliable manufacturer and supplier of stainless steel 309 products that come in different ranges, such as sheets, plates, coils, bars, pipes, tubes, fittings, flanges, and custom stainless steel. The AISI 309/ 309S austenitic stainless steel is commonly used in high-temperature applications. Grade 309 (UNS S30900 / S30908 / Werkstoff 1.4828 / 1.4833) stainless steel is made up of an austenitic alloy that is made for excellent resistance and stability during high temperatures. All of our products are made in accordance with ASTM A240 / ASME SA240 TP 309 standards, which are mostly accepted by different industries to make different components such as furnaces, kilns, boilers, heat exchangers, and thermal processing equipment. SS 309S low-carbon weldable grade is used for fabricated components where weldability and carbide precipitation are critical.
Chemical Composition of SS 309 Products
|
Element |
Weight Percentage (%) |
|
Chromium (Cr) |
22.0 – 24.0% |
|
Nickel (Ni) |
12.0 – 15.0% |
|
Carbon (C) |
0.20% Max |
|
Manganese (Mn) |
2.00% Max |
|
Silicon (Si) |
0.75% Max |
|
Phosphorus (P) |
0.045% Max |
|
Sulfur (S) |
0.030% Max |
|
Iron (Fe) |
Remainder |
ASTM A167 Stainless Steel Mechanical Properties
|
Property |
Value (Imperial) |
Value (Metric Equivalent) |
|
Yield Strength, min. |
30 ksi |
approx 205 MPa |
|
Tensile Strength, min. |
75 ksi |
approx 515 MPa |
|
Elongation, min. |
40% |
40% |
|
Hardness, max. |
95 Rb |
approx 210 HBW |
Physical Properties of Stainless Steel 309
|
Property |
Value (Grade 309) |
|
Density |
0.285 lb/in³ |
|
Modulus of Elasticity |
29.0 × 10⁶ psi |
|
Coefficient of Thermal Expansion (68-212˚F) |
8.7 × 10⁻⁶ /°F |
|
Thermal Conductivity |
9.0 Btu/ft hr °F |
|
Specific Heat |
0.12 Btu/lb °F |
|
Electrical Resistivity |
30.7 Microohm-in |
Stainless Steel 309 Available Products:
Stainless Steel 309 Rod/Bar
Stainless Steel 309 Hex Bar
Stainless Steel 309 Square Bar
Stainless Steel 309 Welded Pipes
Stainless Steel 309 Plates Sheet
Stainless steel 309 fittings
Stainless Steel 309 Components
Why source SS 309 Grade from Lakshya International
- 25+ years in stainless steel distribution — supplied to 30+ countries
- ISO 9001:2015 certified | EN 10204 3.1 / 3.2 mill test certificates with every dispatch
- Approved vendor for OEMs in railway, automotive, dairy and architectural sectors
- Spec data verified against ASTM A240, ASTM A276, ASTM A554, JIS G4303 and EN 10088-2
Applicational Usage of Stainless Steel 309 Products
- Furnace Manufacturing Industry
- Heat Treatment Industry
- Cement Manufacturing Plants
- Glass Manufacturing Industry
- Power Generation Plants
- Petrochemical Processing Industry
- Oil Refinery Industry
Frequently Asked Questions:
What is 309 material?
SS 309 is an austenitic stainless steel with high chromium (22–24%) and nickel (12–15%) content. It belongs to the 300 series and is specially designed for high-temperature service up to 1095°C. Its standard designations are AISI 309, UNS S30900, and DIN 1.4828.
What is 309 stainless steel used for?
SS 309 is used in high-heat applications such as furnace parts, heat exchangers, kiln linings, boiler components, chemical processing equipment, radiant tubes, and combustion chambers. It is also widely used in the cement, petrochemical, and power generation industries where oxidation resistance at high temperatures is critical.
What is better 304 or 309 stainless steel?
It depends on the application. SS 304 is better for general-purpose use, food processing, and ambient-temperature environments. SS 309 is better where high heat resistance is needed; it outperforms 304 above 700°C. For everyday structural or kitchen use, 304 is sufficient and more cost-effective. For furnaces, kilns, or heat exchangers, 309 is the right choice.
What is SS 309 used for in stainless-to-stainless welding?
SS 309 filler wire and electrodes are commonly used to weld dissimilar metals, for example, joining stainless steel to carbon steel, or as a buffer layer between two different stainless grades. It provides a strong, crack-resistant weld with good high-temperature stability, making it a preferred choice in fabrication and repair welding applications.
What is the SS 309 price per kg in India?
The indicative price of SS 309 in India ranges between ₹ 280 – ₹ 525 per kg, depending on the product form (sheet, plate, round bar, pipe), thickness, finish, and order quantity. Prices vary with international nickel and chromium market rates. Contact Lakshya International for a confirmed price with mill test report (MTR).
