304 Stainless Steel Seamless Pipe
304 stainless steel seamless pipes are widely utilized in numerous industries due to their excellent combination of strength, corrosion resistance, and versatility.304 stainless steel resists oxidation and scaling, maintaining its strength at temperatures up to 870°C (1600°F) in continuous use and up to 925°C (1700°F) in intermittent use.
Specification
|
Properties |
Description |
|
304Pipes & Tubes |
1/2" NB - 16" NB |
|
ERW 304 Pipes & Tubes |
1/2" NB - 24" NB |
|
EFW 304 Pipes & Tubes |
6" NB - 100" NB |
|
Size |
1/8″NB - 30″NB IN |
|
Specialized in |
Large Diameter Size |
|
Schedule |
SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
|
Type |
Seamless / ERW / Welded / Fabricated / LSAW Pipes |
|
Form |
Round, Square, Rectangular, Hydraulic, Etc |
|
Length |
Single Random, Double Random & Cut Length. |
|
End |
Plain End, Beveled End, Treaded |
|
Application |
Most commonly used in petroleum refineries, Boilers, Heat exchangers, Condensers, Pipelines, Cooling towers, Steam exhausts, Electric generation plants, On occasion will be found in fertilizer and chemical plants. |
The low carbon content in 304 stainless steel (≤ 0.08%) minimizes the risk of intergranular corrosion, which can occur when chromium carbides precipitate at grain boundaries in the heat-affected zone of welds.Regular cleaning and maintenance help to maintain the passive layer on the surface, which protects against corrosion. Cleaning should be done using appropriate, non-abrasive cleaners.
Chemical Composition
|
Grade |
304 |
304L |
304LN |
304H |
|
UNS Designation |
S30400 |
S30403 |
S30453 |
S30409 |
|
Carbon (C) Max. |
0.08 |
0.035* |
0.035 |
0.04 – 0.10 |
|
Manganese (Mn) Max. |
2.00 |
2.00 |
2.00 |
2.00 |
|
Phosphorous (P) Max. |
0.045 |
0.045 |
0.045 |
0.045 |
|
Sulphur (S) Max. |
0.030 |
0.030 |
0.030 |
0.030 |
|
Silicon (Si) Max. |
1.00 |
1.00 |
1.00 |
1.00 |
|
Chromium (Cr) |
18.0–20.0 |
18.0–20.0 |
18.0–20.0 |
18.0–20.0 |
|
Nickel (Ni) |
8.0–11.0 |
8.0–11.0 |
8.0–11.0 |
8.0–11.0 |
|
Molybdenum (Mo) |
- |
- |
- |
- |
|
Nitrogen (N) |
- |
- |
0.10–0.16 |
- |
|
Iron (Fe) |
Bal. |
Bal. |
Bal. |
Bal. |
304 stainless steel seamless pipes offer robust corrosion resistance across a broad spectrum of environments, making them a versatile choice for many applications. Their ability to withstand oxidation, general corrosion, and pitting, along with their hygienic properties, ensures their reliability and longevity in demanding conditions. While higher-alloyed stainless steels may be necessary for the most aggressive environments, 304 stainless steel remains a cost-effective and reliable option for many industrial and commercial uses.
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