Complaint
| square pipe(mm) | rectangular tube(mm) | ||
| 16×16×0.4~1.5 | 250×250×6.0~30.0 | 10×20×0.6~1.5 | 120×80×2.5~10.0 |
| 18×18×0.4~1.5 | 280×280×6.0~30.0 | 14×21×0.6~1.5 | 150×100×2.5~12.0 |
| 20×20×0.4~1.5 | 300×300×8.0~30.0 | 15×30×1.5~1.5 | 180×150×2.5~12.0 |
| 25×25×0.6~2.0 | 320×320×8.0~30.0 | 15×38×0.6~1.5 | 200×100×4~12.0 |
| 30×30×0.6~4.0 | 350×350×8.0~30.0 | 20×30×0.6~2.0 | 200×150×4~12.0 |
| 34×34×1.0~2.0 | 380×380×8.0~30.0 | 20×40×0.8~2.0 | 250×150×6~12.0 |
| 35×35×1.0~4.0 | 400×400×8.0~30.0 | 20×50×1.0~2.0 | 250×100×6~12.0 |
| 38×38×1.0~4.0 | 420×420×10.0~30.0 | 22×35×0.9~2.0 | 250×200×6~30.0 |
| 40×40×1.0~4.5 | 450×450×10.0~30.0 | 25×40×0.9~3.75 | 300×150×6~30.0 |
| 44×44×1.0~4.5 | 480×480×10.0~30.0 | 25×65×1.0~2.0 | 300×200×6~30.0 |
| 45×45×1.0~5.0 | 500×500×10.0~30.0 | 30×40×1.0~3.75 | 300×250×6~30.0 |
| 50×50×1.0~5.0 | 30×45×1.0~3.75 | 400×250×8~30.0 | |
| 60×60×1.5~5.0 | 30×50×1.0~4.0 | 400×300×8~30.0 | |
| 70×70×2.0~6.0 | 30×60×1.0~4.5 | 450×200×8~30.0 | |
| 75×75×2.0~6.0 | 40×50×1.0~4.5 | 450×250×8~30.0 | |
| 80×80×2.0~6.0 | 40×60×1.0~5.0 | 400×300×8~30.0 | |
| 85×85×2.0~6.0 | 40×80×1.5~5.0 | 400×350×8~30.0 | |
| 95×95×2.0~8.0 | 40×100×2.0~5.0 | 500×200×10~30.0 | |
| 100×100×2.0~8.0 | 50×60×2.0~5.0 | 500×250×10~30.0 | |
| 120×120×4.0~8.0 | 50×80×2.0~5.0 | 500×300×10~30.0 | |
| 150×150×6.0~10.0 | 50×100×2.0~8.0 | 500×350×10~30.0 | |
| 180×180×6.0~12.0 | 60×80×2.0~6.0 | 500×400×10~30.0 | |
| 200×200×6.0~30.0 | 80×100×2.0~8.0 | 500×450×10~30.0 | |
| 220×220×6.0~30.0 | 120×60×2.5~10.0 | ||
| Chemical composition of stainless steel in various shapes | ||||||||||||||
| category | American Standard | Uniform digital code | New Brand | Old brand | Chemical composition (mass fraction) /% | |||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | N | Others | |||||
| Austenite | 301 | S30110 | 12Cr17Ni7 | 1Cr17N17 | 0.15 | 1.00 | 2.00 | 0.045 | 0.030 | 6.00~8.00 | 16.00~18.00 | 0.1 | ||
| 304 | S30408 | 06Cr19Ni10 | 0Cr18Ni9 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00~11.00 | 18.00~20.00 | ||||
| 304L | S30403 | 022Cr19Ni10 | 00Cr19Ni10 | 0.03 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00~12.00 | 18.00~20.00 | ||||
| 316 | S31608 | 06Cr17Ni12Mo2 | 0Cr17Ni12Mo2 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00~14.00 | 16.00~18.00 | 2.00~3.00 | |||
| 316L | S31603 | 022Cr17Ni12Mo2 | 00Cr17Ni14Mo2 | 0.03 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00~14.00 | 16.00~18.00 | 2.00~3.00 | |||
| 321 | S32168 | 06Cr18Ni11Ti | 0Cr18Ni10Ti | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 9.00~12.00 | 17.00~19.00 | Ti 0.7 | |||
| Dual-phase steel | 70 | S21953 | 022Cr22Ni15Mo3N | S31803/F51 | 0.03 | 1.00 | 2.00 | 0.030 | 0.020 | 4.50~6.50 | 21.00~23.00 | 2.50~3.50 | 0.08~0.20 | |
| 71 | S21953 | 022Cr23Ni15Mo3N | S32205/F60 | 0.03 | 1.00 | 2.00 | 0.030 | 0.020 | 4.50~6.51 | 22.00~23.00 | 2.50~3.50 | 0.14~0.20 | ||
| Ferrite | 430 | S11710 | 10Cr17 | 1Cr17 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | (0.60) | 16.00~18.00 | |||
| Martensite | 410S | S41008 | 06Cr13 | 0Cr13 | 0.08 | 1.00 | 1.00 | 0.040 | 0.030 | (0.60) | 11.50~13.50 | |||
| 410 | S41010 | 12Cr13 | 1Cr13 | 0.08~0.15 | 1.00 | 1.00 | 0.040 | 0.030 | (0.60) | 11.50~13.50 | ||||
| 420 | S42020 | 20Cr13 | 2Cr13 | 0.16~0.25 | 1.00 | 1.00 | 0.040 | 0.030 | (0.60) | 12.00~14.00 | ||||
| 420 | S42030 | 30Cr13 | 3Cr13 | 0.26~0.35 | 1.00 | 1.00 | 0.040 | 0.030 | (0.60) | 12.00~14.00 | ||||
| 420 | S42040 | 40Cr13 | 4Cr13 | 0.36~0.45 | 0.60 | 0.80 | 0.040 | 0.030 | (0.60) | 12.00~14.00 | ||||
| 431 | S43110 | 14Cr17Ni2 | 1Cr17Ni2 | 0.11~0.17 | 0.80 | 0.80 | 0.040 | 0.030 | 1.50~2.50 | 16.00~18.00 | ||||
| 440L | S44090 | 95Cr18 | 9Cr18 | 0.90~1.00 | 0.80 | 0.80 | 0.040 | 0.030 | (0.60) | 17.00~19.00 | ||||
Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural sheds, automotive industry, railways, highway guardrails, container skeletons, furniture, decoration, and steel structure fields.
