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Description

304 Seamless Tube is a long strip of steel with a hollow section and no seams around the perimeter,made by cold drawing or hot rolling process,used to manufacture piping systems and equipment. 304 seamless pipe is used for high pressure and high temperature applications because of the high operating temperature of 870 degrees Celsius and the strength.

304 stainless steel, also known as 18-8 stainless steel, is a common stainless steel material containing 18% chromium and 8% nickel. It has excellent corrosion resistance and oxidation resistance, especially resistance to general corrosive media, such as Air, water and some chemical acids.

ss 304 seamless pipe

304 Seamless Tube Specification

Product Name	304 Seamless Stainless Steel Pipe
Size	Outer Diameter:6-610 mm WallThickness:0.5-45 mm (Size can be customized.) Length:≤12000mm or as per customer request
Standard	ASTM A213, ASTM A312, ASTM A789, ASTM A790
Material Grade	200 series 201 202 202Cu 204Cu, etc 300series: 301,302,303,304, 304L, 309, 309s, 310, 310S, 316, 316L, 316Ti, 317L, 321,347,etc 400 series: 409, 409L, 410,420,430,431,439,440,441,444,etc Others:2205,2507,2906,330,660,630,631,17-4ph,17-7ph, S318039 904L,etc
Type	Seamless,Welded
Surface	BA, 2B, 2D, 4K, 6K, 8K, NO.4, HL, SB, Embossed
Advantage	SGS,BV,etc

ASTM A312 TP304 Chemical Composition

Element	SS 304
Ni	8.0 – 11.0
C	0.08
Mn	2.0 max
P	0.045 max
S	0.03 max
Si	1.0 max
Cr	18.0 – 20.0

SS 304 Seamless Pipe Tolerance

304 Stainless Steel Pipe OD	ASTM A312 TP304 Pipe Tolerance
4-35mm	±0.08mm
35-38mm	±0.15mm
38-60mm	±0.20mm
≥60	±0.25mm

304 Stainless Steel Seamless Pipe Suface Finish

Surface Finish		Internal Surface(ID)		Exterbal Surface(OD)
		Roughness Average(RA)		Roughness Average(RA)
		μ inch	μm	μ inch	μm
AP	Annealed & Pickled	Not defined	Not defined	40 or Not defined	1.0 or Not defined
BA	Beight Annealed	40,32,25,20	1.0,0.8,0.6,0.5	32	0.8
MP	Mechanical Polish	40,32,25,20	1.0,0.8,0.6,0.5	32	0.8
EP	Electro Polish	15,10,7,5	0.38,0.25,0.20;0.13	32	0.8