304 Seamless Mild Steel Pipe
The hardness, density, and specific heat capacity of 304 stainless steel are very good, whether it is in processing or in use, it has very good stability and safety. It is precisely because it has a density of 7.93, so it can adapt to the external environment well when it is used, and it is not easy to rust.
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Product Introduction
304 seamless mild steel pipe
304 seamless pipe zero cutting has the following advantages:
First of all, excellent corrosion resistance, can adapt to the harsh working environment.
Secondly, good strength and toughness ensure the safe transportation and service life of the pipeline.
Thirdly, the good processing performance facilitates the user's processing and installation.
Finally, the good appearance effect improves the added value and decorative effect of the product.
As a common steel product, 304 seamless steel pipe has a wide range of applications in various fields. Its excellent performance and broad market prospects make it an indispensable material.
| Product name | Stainless steel pipe/ tube |
| Technique | Welded/ Seamless |
| Standard | ASTM A778, ASTM A312, JIS G3448, EN10312, CJ/T 151 |
| Material | Mainly: 201, 202, 304, 304L, 304H, 316, 316L, 316Ti, 2205, 330, 630, 660, 409L, 321, 310S, 410, 416, 410S, 430, 347H, 2Cr13, 3Cr13 etc 300series: 301, 302, 303, 304, 304L, 309, 309s, 310, 310S, 316, 316L, 316Ti, 317L, 321, 347 200series: 201, 202, 202cu, 204 400series: 409, 409L, 410, 420, 430, 431, 439, 440, 441, 444 Others: 2205, 2507, 2906, 330, 660, 630, 631, 17-4ph, 17-7ph, S318039 904L,etc Duplex stainless steel: S22053, S25073, S22253, S31803, S32205, S32304 Special Stainless Steel: 904L, 347/347H, 317/317L, 316Ti, 254Mo |
| Outside Diameter | Seamless Pipe: 4mm-812.80mm |
| Welded Pipe: single slit(Φ8mm-Φ630mm); girth(Φ630mm-Φ3000mm) | |
| Thickness | Seamless Pipe: 0.5mm - 60mm |
| Welded Pipe: single slit(0.5mm-25mm); girth(3mm-45mm) | |
| Length | ≤12000mm or as per customer request |
| Surface | Polishing (180#,220#,240#,320#400#,600#), Hairline, Aid Pickling, Inside weld leveling, Online bright heat) |
| Application | Decoration (Processed into railings, handrails, doors and windows), Medical, Industry, Water Supply, Municipal Engineering, etc |
| Delivery time | 7-15 days subject to the clients' requirement and quantity |
| Package | Clients' requirement and standard export sea-worthy packing |
| Austenitic Stainless Steel | 201, 301, 304, 305, 310, 314, 316, 321, 347, 370, etc |
| Martensitic Stainless Steel | 410, 414, 416, 416, 420, 431, 440A, 440B, 440C, etc |
| Duplex Stainless Steel | S31803, S32101, S32205, S32304, S32750, etc |
| Ferritic Stainless Steel | 429, 430, 433, 434, 435, 436, 439, etc |
Stainless Steel Grade Comparison Table
| China | Japan | America | Korean | EU | Australia | Density t/m |
| GB/T20878 | JIS | ASTM | KS | BSEN | AS | |
| 12Cr13 | SUS403 | 403 | STS403 | - | 403 | 7.75 |
| 20Cr13 | SUS420J1 | 420 | STS420J1 | 1.4021 | 420 | 7.75 |
| 30Cr13 | SUS420J2 | - | STS420J2 | 1.4028 | 420J2 | 7.75 |
| 10Cr17 | SUS430 | 430 | STS430 | 1.4016 | 430 | 7.70 |
| 68Cr17 | SUS440A | 440A | STS440A | - | 440A | 7.70 |
| 06Cr19Ni10 | SUS304 | 304 | STS304 | 1.4301 | 304 | 7.93 |
| 022Cr19Ni10 | SUS304L | 304L | STS304L | 1.4306 | 304L | 7.93 |
| 06Cr17Ni12Mo2 | SUS316 | 316 | STS316 | 1.4401 | 316 | 7.98 |
| 022Cr17Ni12Mo2 | SUS316L | 316L | STS316L | 1.4404 | 316L | 7.98 |
| 06Cr18Ni11Ti | SUS321 | 321 | STS321 | 1.4541 | 321 | 7.93 |
| 06Cr18Ni11Nb | SUS347 | 347 | STS347 | 1.455 | 347 | 7.98 |
| Chemical component ( %) | |||||||||
| Grade | C (Max) | Si (Max) | Mn (Max) | P (Max) | S (Max) | Cr | Ni | Mo | Nitrogen (Max) |
| 201 | 0.15 | 1 | 5.50 - 7.50 | 0.06 | 0.03 | 16.00 - 18.00 | 3.50 - 5.50 | - | 0.25 |
| 202 | 0.15 | 1 | 7.50 - 10.00 | 0.06 | 0.03 | 17.00 - 19.00 | 4.00 - 6.00 | - | 0.25 |
| 301 | 0.15 | 1 | 2 | 0.045 | 0.03 | 16.00 - 18.00 | 6.00 - 8.00 | - | 0.1 |
| 304 | 0.08 | 1 | 2 | 0.045 | 0.03 | 18.00 - 20.00 | 8.00 - 10.50 | - | 0.1 |
| 304L | 0.03 | 1 | 2 | 0.045 | 0.03 | 18.00 - 20.00 | 8.00 - 12.00 | - | 0.1 |
| 309S | 0.08 | 1 | 2 | 0.045 | 0.03 | 22.00 - 24.00 | 12.00 - 15.00 | - | - |
| 310S | 0.08 | 1.5 | 2 | 0.045 | 0.03 | 24.00 - 26.00 | 19.00 - 22.00 | - | - |
| 316 | 0.08 | 1 | 2 | 0.045 | 0.03 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | 0.1 |
| 316L | 0.03 | 1 | 2 | 0.045 | 0.03 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | 0.1 |
| 316Ti | 0.08 | 1 | 2 | 0.045 | 0.03 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | 0.1 |
| 317 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 18.00 - 20.00 | 11.00 - 14.00 | 3.00 - 4.00 | 0.1 |
| 317L | 0.03 | 0.75 | 2 | 0.045 | 0.03 | 18.00 - 20.00 | 11.00 - 15.00 | 3.00 - 4.00 | 0.1 |
| 321 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | 17.00 - 19.00 | 9.00 - 12.00 | - | 0.1 |
| Standard | Material | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | Hardness(HRB) |
| ASTM A240 | 201 | ≥515 | ≥260 | ≥40 | ≤95 |
| 304 | ≥515 | ≥205 | ≥40 | ≤92 | |
| 316L | ≥485 | ≥170 | ≥30 | - | |
| 430 | ≥450 | ≥205 | ≥22 | ≤89 |
Selective Surface Finish
| Itme | Surface finishing | Surface finishing methods | Main application |
| NO.1 | HR | Heat treatment after hot rolling, pickling, or with treatment | For without the purpose of the surface gloss |
| NO.2D | Without the SPM | Method of heat treatment after cold rolling, pickling surface roller with wool or eventually a light rolling a matte surface processing | General materials,building materials. |
| NO.2B | After SPM | Giving No.2 processing materials appropriate method of cold light sheen | General materials, building materials ( most of the goods are processed ) |
| BA | Bright annealed | Bright heat treatment after cold rolling , in order to be more shiny, cold light effect | Automotive parts, home appliances, vehicles, medical equipment, food equipment |
| NO.3 | Shiny, coarse grain processing | The NO.2D or NO.2B processing timber No. 100-120 polishing abrasive grinding belt | Building materials, kitchen supplies |
| NO.4 | After CPL | The NO.2D or NO.2B processing timber No. 150-180 polishing abrasive grinding belt | Building materials, kitchen supplies, vehicles, medical equipment, food equipment |
| 240# | Grinding of fine lines | The NO.2D or NO.2B processing timber 240 polishing abrasive grinding belt | Kitchen appliances |
| 320# | More than 240 lines of grinding | The NO.2D or NO.2B processing timber 320 polishing abrasive grinding belt | Kitchen appliances |
| 400# | Close to BA luster | The MO.2B timber 400 polishing wheel polishing method | Building materials, kitchen utensils |
| HL (hair lines) |
Polishing line having a long continuous processing | In a suitable size ( usually mostly No. 150-240 grit ) abrasive tape for as long as the hair, having a continuous processing method of polishing line | The most common building materials processing |
| NO.6 | NO.4 processing less than the reflection , the extinction | NO.4 processing material used for polishing Tampico brushing | Building materials, decorative |
| NO.7 | Highly accurate reflectance mirror processing | No. 600 of the rotary buff with a polishing | Building materials, decorative |
| NO.8 | Highest reflectivity mirror finish | Fine particles of abrasive material in order polishing , mirror polishing with a polishing | Building materials, decorative, mirrors |
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