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Stainless steel square bar has the flat surface and defined edges. Due to the shape, stainless steel square bar has the stronger strength and better handle pressure capacity than stainless steel round bar.
There are a series of stainless steel round bars available, such as 304, 304L, 316, 316L, 430, 904L etc.
Stainless steel square bar has the high corrosion resistance, high strength and durability. It is widely used in manufacture of all kinds of industrial components, such as in industry, agriculture, tool and die, steel frames and structures etc.
| Type | Grade | Grade | Chemical Component % | ||||||||||
| C | Cr | Ni | Mn | P | S | Mo | Si | Cu | N | Other | |||
| Austenitic | 201 | SUS201 | ≤0.15 | 16.00-18.00 | 3.50-5.50 | 5.50-7.50 | ≤0.060 | ≤0.030 | - | ≤1.00 | - | ≤0.25 | - |
| 202 | SUS202 | ≤0.15 | 17.00-19.00 | 4.00-6.00 | 7.50-10.00 | ≤0.060 | ≤0.030 | - | ≤1.00 | - | ≤0.25 | - | |
| 301 | 1.4310 | ≤0.15 | 16.00-18.00 | 6.00-8.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | ≤0.10 | - | |
| 304 | 1.4301 | ≤0.07 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 304L | 1.4307 | ≤0.030 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 304H | 1.4948 | 0.04-0.10 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 309 | 1.4828 | ≤0.20 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 309S | * | ≤0.08 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 310 | 1.4842 | ≤0.25 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.50 | - | - | - | |
| 310S | * | ≤0.08 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.50 | - | - | - | |
| 314 | 1.4841 | ≤0.25 | 23.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | 1.50-3.00 | - | - | - | |
| 316 | 1.4401 | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤1.00 | - | - | - | |
| 316L | 1.4404 | ≤0.030 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤1.00 | - | - | - | |
| 316Ti | 1.4571 | ≤0.08 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤1.00 | - | 0.1 | Ti5（C+N)~0.70 | |
| 317 | * | ≤0.08 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤1.00 | - | 0.1 | - | |
| 317L | 1.4438 | ≤0.030 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤1.00 | - | 0.1 | - | |
| 321 | 1.4541 | ≤0.08 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | Ti5（C+N)-0.70 | |
| 321H | * | 0.04-0.10 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | Ti5（C+N)~0.70 | |
| 347 | 1.4550 | ≤0.08 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | - | ≤1.00 | - | - | Nb≥10*C%-1.10 | |
| 347H | 1.494 | 0.04-0.10 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | - | - | Nb≥10*C%-1.10 | ||
| XM-19 | Nitronic50 | ≤0.06 | 20.50-23.50 | 11.50-13.50 | 4.0-6.0 | ≤0.045 | ≤0.030 | 1.50-3.00 | ≤1.00 | - | 0.2-0.4 | Nb：0.10-0.30 V：0.10-0.30 | |
| 904L | N08904 | ≤0.02 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | ≤0.045 | ≤0.035 | - | ≤1.00 | - | 0.1 | Cu:1.0-2.0 | |
| Duplex | 2205 | S32205 | ≤0.03 | 22.0-23.0 | 4.5-6.5 | ≤2.00 | ≤0.030 | ≤0.020 | 3.0-3.5 | ≤1.00 | - | 0.14-0.20 | - |
| 2507 | S32750 | ≤0.03 | 24.0-26.0 | 6.0-8.0 | ≤1.20 | ≤0.035 | ≤0.020 | 3.0-3.5 | ≤0.80 | 0.5 | 0.24-0.32 | - | |
| * | S32760 | ≤0.03 | 24.0-26.0 | 6.0-8.0 | ≤1.00 | ≤0.030 | ≤0.010 | 3.0-4.0 | ≤1.00 | 0.5-1.00 | 0.2-0.3 | - | |
| 2304 | S32304 | ≤0.03 | 21.5-24.5 | 3.0-5.5 | ≤2.50 | ≤0.040 | ≤0.030 | 0.05-0.6 | ≤1.00 | 0.05-0.6 | 0.05-0.2 | - | |
| 329 | 1.4460 | ≤0.08 | 23.00-28.00 | 2.00-5.00 | ≤1.00 | ≤0.040 | ≤0.030 | 1.00-2.00 | ≤0.75 | - | - | - | |
| Ferrite | 409 | S40900 | ≤0.03 | 10.50-11.70 | 0.5 | ≤1.00 | ≤0.040 | ≤0.020 | - | ≤1.00 | - | ≤0.030 | Ti6（C+N)-0.50 Nb:0.17 |
| 430 | 1Cr17 | ≤0.12 | 16.00-18.00 | - | ≤1.00 | ≤0.040 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 444 | S44400 | ≤0.025 | 17.50-19.50 | 1 | ≤1.00 | ≤0.040 | ≤0.030 | 1.75-2.5 | ≤1.00 | - | 0.035 | - | |
| 446 | S44600 | ≤0.20 | 23.00-27.00 | 0.75 | ≤1.50 | ≤0.040 | ≤0.030 | 1.50-2.50 | ≤1.00 | - | ≤0.25 | - | |
| Martensite | 410 | 1Cr13 | 0.08-0.15 | 11.50-13.50 | 0.75 | ≤1.00 | ≤0.040 | ≤0.030 | - | ≤1.00 | - | - | - |
| 410S | * | ≤0.080 | 11.50-13.50 | 0.6 | ≤1.00 | ≤0.040 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 416 | Y1Cr13 | ≤0.15 | 12.00-14.00 | 3.0 | ≤1.25 | ≤0.060 | ≥0.15 | - | ≤1.00 | - | - | - | |
| 420 | 2Cr13 | ≥0.15 | 12.00-14.00 | - | ≤1.00 | ≤0.040 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 420J2 | 3Cr13 | 0.26-0.35 | 12.00-14.00 | - | ≤1.00 | ≤0.040 | ≤0.030 | - | ≤1.00 | - | - | - | |
| 431 | 1Cr17Ni2 | ≤0.20 | 15.00-17.00 | 1.50-2.50 | ≤1.00 | ≤0.040 | ≤0.030 | - | ≤0.80 | - | - | - | |
| 440C | 11Cr17 | 0.95-1.20 | 16.00-18.00 | - | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | - | - | - | |
| PH | 630 | 17-4PH | ≤0.07 | 15.00-17.50 | 3.00-5.00 | ≤1.00 | ≤0.035 | ≤0.030 | - | ≤1.00 | 3.00-5.00 | - | Nb 0.15-0.45 |
| 631 | 17-7PH | ≤0.09 | 16.00-18.00 | 6.50-7.50 | ≤1.00 | ≤0.035 | ≤0.030 | - | ≤1.00 | ≤0.50 | - | Al 0.75-1.50 | |
| 632 | 15-5PH | ≤0.09 | 14.00-16.00 | 3.50-5.50 | ≤1.00 | ≤0.035 | ≤0.030 | 2.00-3.00 | ≤1.00 | 2.5-4.5 | - | Al 0.75-1.50 | |
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