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stainless steel seamless pipe

304 stainless steel seamless pipe

About 304 stainless seamless steel pipe

304 seamless tube has no blisters, no sand hole, no spots, no cracks, flat bead. Bending, cutting, 

welding processing performance advantages, the advantages of nickel content stability,products in 

line with ASTM,GB,JIS and other specifications


304 seamless steel pipe is the resistance of air, steam, water and other corrosive medium and weak

 acid, alkali, salt and other corrosive medium chemical etching. Stainless acid resistant steel pipe.



About stainelss steel seamless steel pipe

Seamless pipe is a hollow section, no seams around the strip steel. The wall is thicker, it is more economical and practical, the wall thickness of the thinner, processing costs will be substantially increased it; 

the product process to determine its performance limitations, generally low precision seamless steel pipe: uneven thickness, the appearance of low brightness tube length into this is high, and the inner surface pitting and black spots difficult to remove; detection and plastic must be processed offline. Therefore, it shows its superiority in high pressure, high strength and mechanical structure.


Classification for stainless seamless steel tubes

According to rolling technical : Hot rolling and hot extrusion.Cold rolled: 


According to the Different metallographic structure

1)Semi ferrite,Semi Markov system.

2)Martensite,austenite,Austenitic - iron ferrite.


Standard size for stainlss seamless steel pipe 

英寸
Inch
公称通径(mm)
DN
外径(mm)
OD
壁厚标准(Standards of wall thickness)
SCH5sSCH10sSCH10SCH20SCH30SCH40SCH60SCH80SCH100SCH120––
1/8DN610.31.241.732.42
1/4DN813.71.652.243.02
3/8DN1017.11.652.313.2
1/2DN1521.31.652.112.773.73
3/4DN2026.71.652.112.873.91
1DN2533.41.652.773.384.55
1-1/4DN3242.21.652.773.564.85
1-1/2DN4048.31.652.773.685.05
2DN5060.31.652.773.915.54
2-1/2DN6573.02.113.055.167.01
3DN8088.92.113.055.497.62
3-1/2DN90101.62.113.055.748.08
4DN100114.32.113.056.028.5811.13
5DN125141.32.773.46.559.5312.7
6DN150168.32.773.47.1110.9714.27
8DN200219.12.773.766.357.048.1810.3112.715.0918.26
10DN250273.13.404.196.357.89.2712.715.0918.2621.44
12DN300323.93.964.576.358.3810.3114.2717.4821.4425.4
14DN350355.53.964.786.357.929.5311.1315.0919.0523.8327.79
––


Chemical compostion

GradeC(%)Si(%)Mn(%)Cr(%)P(%)S(%0N(%)Ni(%)Cu(%)
304≤0.08≤1.00≤2.0018.00-20.00≤0.045≤0.03≤0.108.00-11.00---

Physical property

GradeTensile strength
(Mpa)
Yield Strength
(Mpa)
Elongation
(%)
304≥520≥205≥40

The advantage for 304 stainelss seamless steel pipe

304 seamless pipe wall thickness, it is more economical and practical, the wall thickness of

the thinner, it will greatly increase the cost of processing;


304 process seamless pipe limits its performance, generally low precision seamless steel pipe: 

uneven thickness, the appearance of low brightness tube length high cost, and the internal and 

external surface pitting and black spots difficult to remove;


304 seamless pipe inspection and plastic surgery must be offline. Therefore, it shows its superiority 

in high pressure, high strength and mechanical structure.


Application for 304 seamless pipe

Widely used in petroleum, chemical, medical, food, light industry, machinery and instruments and other industrial transportation 

pipeline and mechanical components, etc.. In addition, the bending and torsion strength of the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structure. Also used for production of various conventional weapons, artillery barrel, etc..



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