Overview
Grade 304LN is a nitrogen-strengthened version of Grade 304, it is a nitrogen-strengthened version of Carpenter Stainless Type 304L. By means of solid solution strengthening, the nitrogen provides significantly higher yield and tensile strength as annealed than Type 304L without adversely affecting ductility, corrosion resistance or non-magnetic properties. Meanwhile, 304LN stainless has good resistance to atmospheric corrosion, like Type 304L. 304LN is resistant to a wide variety of inorganic chemicals as well as nitric acid.
Specification
ASTM A213/A213M-21a Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
304LN Stainless Steel Pipe & Tubes Specification | ASTM A269, ASTM A213, ASTM A312, ASME SA269, ASME SA213, ASME SA312 |
304LN Stainless Steel Pipe & Tubes Grades | 202, 304, 304L, 304H, 304LN, 309S, 310S, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H, 904L, SMO 254, ALLOY 254, 6MO, 6MOLY, UNS S31254 ETC. |
304LN Stainless Steel Pipe & Tubes Type | Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish |
304LN Stainless Steel Pipe & Tubes Outer Diameter Size | Seamless - 1/2"NB TO 18"NB |
304LN Stainless Steel Pipe & Tubes Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
304LN Stainless Steel Pipe & Tubes Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
304LN Stainless Steel Pipe & Tubes Ends | Plain Ends / Beveled Ends |
304LN Stainless Steel Pipe & Tubes Other Testing | Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc |
Chemical Composition
Element | Content (%) |
Chromium, Cr | 18-20 |
Nickel, Ni | 8-12 |
Manganese, Mn | 2 max |
Silicon, Si | 1 max |
Nitrogen, N | 0.1-0.16 |
Phosphorous, P | 0.045 max |
Carbon, C | 0.03 max |
Sulfur, S | 0.03 max |
Iron, Fe | Remainder |
Mechanical Properties
Properties | Metric | Imperial |
|---|---|---|
Tensile strength | 515 MPa | 74694 psi |
Yield strength | 205 MPa | 29732 psi |
Elongation at break (in 50 mm) | 40% | 40% |
Hardness, Brinell | 217 | 217 |
Hardness, Rockwell B | 95 | 95 |
Applications
1. Heat exchangers
2. Chemical industry
3. Food industry
4. Petroleum industry
5. Fabrication industry
6. Nuclear industry
