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Safe and 439 stainless steel reduces the content of C on the basis of ordinary ferritic material (430) and adds stabilizing elements such as Ti to improve the intergranular corrosion resistance, formability and weldability of the steel. Compared with 304 steel, although the elongation is low (about 30%), the strength and corrosion resistance are equivalent, and the corrosion resistance is better than 200 series materials. Chromium content is 12% ~ 30%. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its chloride stress corrosion resistance is better than that of stainless steel.
439 Stainless Steel Angle Specification
| Product | 439 Stainless Steel Angle | Grade | 200 series：201, 202 etc. |
| Thickness | 3-24mm or as required | 300 series：304, 304L, 316, 316L, 301, 302, 303, 309, 309S, 310, 310S, 321, 904L etc. | |
| Dimensions | 25-140mm or as required | 400 series：410, 420, 430, 440 etc. | |
| Length | 1-12m or as required | Duplex stainless：2205, 2507 2304 etc. | |
| Standard | ASTM,JIS,SUS,GB,DIN | Other：1.4410, 1.4362, 254SOM etc. | |
| Technique | Hot rolled / Cold rolled | Surface | 2B,BA,No.1,No.4,No.8,8K,Mirror,Checkered,Embossed, Hairline,Sand Blast,StainBrush,Etching,etc. |
439 Stainless Steel Chemical Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 81.3535 |
| Chromium, Cr | 17.35 |
| Silicon, Si | 0.35 |
| Titanium, Ti | 0.335 |
| Manganese, Mn | 0.25 |
| Nickel, Ni | 0.200 |
| Molybdenum, Mo | 0.1 |
| Niobium, Nb (columbium, Cb) | 0.02 |
| Phosphorous, P | 0.02 |
| Nitrogen, N | 0.0100 |
| Carbon, C | 0.01 |
| Sulfur, S | 0.0015 |
439 Stainless Steel Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength (annealed) | 438 MPa | 63500 psi |
| Yield strength (annealed/ @strain 0.200 %) | 263 MPa | 38100 psi |
| Modulus of elasticity | GPa | ksi |
| Poisson’s ratio | 0.270 – 0.290 | 0.270 – 0.290 |
| Elongation at break (In 2″, 50% cold worked) | 2.80% | 2.80% |
| Hardness, Rockwell B (annealed) | 72.9 | 72.9 |
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