The No.1 finish 304 stainless steel pipe refers to a stainless steel pipe made from grade 304 stainless steel with a No.1 finish on its surface. The No.1 finish is also known as a mill finish and is the coarsest surface finish available for stainless steel.
The No.1 surface finish is the rough, dull and non-reflective surface of the stainless steel pipe. It is obtained by hot-rolling the stainless steel coil or sheet and annealing it in a controlled environment. The No.1 surface finish is commonly used in industrial applications and is not suitable for decorative purposes due to its lack of shine and smoothness. It is commonly used for making heavy-duty machinery, chemical processing equipment, and kitchen appliances. It is also used in the construction industry for building structural supports and tubing.
NO.1 Surface 304 Stainless Steel Pipe Specification
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Name |
304 Stainless steel pipe |
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Items |
Square tubes, round tubes, oval pipes, special shaped pipes, |
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empaistic pipes, fittings |
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Standard |
ASTM A554, A249, A269 and A270 |
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Material Grade |
201: Ni 0.8%~1% |
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202: Ni 3.5%~4.5% |
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304: Ni 8%, Cr 18% |
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316: Ni 10%, Cr 18% |
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316L: Ni10%~14% |
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430: Cr16%~18% |
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Outer Diameter |
9.53mm--159mm |
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Thickness |
0.3mm - 3.0mm |
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Length |
6m or as customers' request |
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a) Outer Diameter: +/- 0.2mm |
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Tolerance |
b) Thickness: +/- 0.02mm |
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c) Length: +/- 5mm |
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Surface |
Pickling and annealing |
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AP tube |
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BA tube |
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MP tube |
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EP tube |
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End treatment |
1) Plain |
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2) Beveled |
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3) Thread with Coupling or cap |
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4)Bending |
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Surface Treatment for 304 stainless steel pipe
The No.1 surface finish can be further processed with additional surface treatments such as grinding, polishing, or brushing to achieve a smoother and more aesthetically pleasing surface appearance.
304 Stainless Steel Material Properties
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Material Composition |
304 |
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C |
≤0.08 |
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Si |
≤1.00 |
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Mn |
≤2.00 |
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P |
≤0.045 |
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S |
≤0.030 |
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Cr |
18-20 |
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Ni |
8-10.5 |
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Mo |
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Material Item |
304 |
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Tensile Strength |
≥520 |
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Yield Strength |
≥205 |
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Extension |
≥35% |
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Hardness (HV) |
<90 |
We JBLSTEEL are the leading manufacturer, supplier and exporter of 304 Stainless Steel Pipes, offering customized services to meet the unique needs of our clients. We specialize in stainless steel pipes of various grades and sizes, which can be customized to specific requirements.Feel free to contact us for more info about 304 Stainless Steel Pipe.
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