Stainless Steel 304 Seamless Tubes is covered by highly protective film of chromium oxyhydroxide. In order to achieve the desired lower cost, Stainless Steel 304 Welded Tubes is specifically developed to include less of the more expensive elements nickel and chromium and higher percentages relatively of inexpensive carbon. Intergranular corrosion may be compromised if Stainless Steel 304 EFW Tubes is heated between 800 degrees F (427 c) and 1650 F (899 C) or cooled slowly through that range. Stainless Steel 304 ERW Tubes contains up to 0.08 % carbon therefore subject to sensitisation and ‘weld decay’ - corrosion after heating to about 650 °C as would usually occur in the heat affected zone adjacent to a weld. Fabrication methods involving cold working may require an intermediate annealing stage in these Stainless Steel 304 Round Tubes to alleviate work hardening and avoid tearing or cracking. Our Stainless Steel 304 Square Tubes has Ease of fabrication, Beauty of appearance, Excellent formability, Ease of cleaning, etc.
For more severe corrosion conditions, these Stainless Steel 304 Electropolish Tubes are too sensitive to pitting or crevice corrosion by chlorides or general corrosion in acidic applications. Continuous use of our SS 304 Heat Exchanger Tubes in the 425-860 °C range is not recommended if subsequent aqueous corrosion resistance is important. These SS 304 Rectangular Tube is used when higher resistance to pitting and crevice corrosion is required, also in chloride environments.
Equivalent Grades for 304 Stainless Steel Tubes
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
304 SS Welded Tubes Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
304 | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 |
Stainless Steel 304 Seamless Tube Mechanical Properties
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
304 | 515 | 205 | 40 | 92 | 201 |
Stainless Steel 304 Tubes Physical Properties
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
304 | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
NOTE : OTHER SIZES AND GRADES ARE AVAILABLE UPON REQUEST
SS Seamless Tubes are available in different grades and standards. Some of the standard features these are made available in include
Specifications : ASTM A 312 ASME SA 312 / ASTM A 358 ASME SA 358
Dimensions : ASTM, ASME and API
Size : 1/8″NB TO 30″NB IN
SS Tubes : 1/2″ NB – 16″ NB
SS ERW Tubes : 1/2″ NB – 24″ NB
SS EFW Tubes : 6″ NB – 100″ NB
Specialized in : Large Diameter Size
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Form : Round, Square, Rectangular, Hydraulic Etc
Length : Single Random, Double Random & Cut Length
End : Plain End, Beveled End, Treaded
Type : Seamless / ERW / Welded / Fabricated / LSAW Tubes
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Stainless Steel 304 Tubes : SS 304 Tube Exporter | ASTM A249 Stainless Steel 304 Heat exchanger Tubes| Stainless Steel 304 Hexagonal Tube | SS 304 Seamless Tube | Stainless Steel 304 Welded Tubes | SS 304 Tube Chemical Composition | Stainless Steel 304 Tubes Weight | SS 304 Tubes Price | Stainless Steel 304 Tubes Sizes | Sizes of Stainless Steel 304 Tubes | ASTM A312 Heavily Cold Worked Austenitic Stainless Steel 304 Tube | SS 304 Instrumentation Tubes | Stainless Steel 304 Bright Annealing Tubes SS Tubes | Steel 304 ERW Tubes | ASTM A312 Stainless Steel 304 Tubes | SS 304 Square Tubes | Stainless Steel 304 Rectangular Tubes.
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