ASTM B625 UNS N08904 Type 904l Plates provides good chloride stress corrosion cracking resistance, pitting and general corrosion resistance which are superior to 316L and 317L. Type 904l Plates is develop to out-break environments containing dilute sulphuric acids. 904l stainless steel plate has good resistance to inorganic acids such as hot phosphoric acid. Type 904l Plates can be easily welded and processed by standard fabrication process.
ASTM B625 UNS N08904 Composition Chart
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| SS 904L | 0.020 max | 2 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 23.00 – 28.00 | 1.00 – 2.00 |
Mechanical Characteristics of Type 904l Plates
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
ASTM A240 UNS N08904 Type 904l Plates material can be solution heat-treated at 1090 to 1175°C by following by rapid cooling method. Thermal treatment is suitable for hardening it. Type 904l Plates major applications are oil refinery equipment, Pulp and paper processing industries, gas scrubbing plants, etc.
The use-cases vary from industry to industry. For example, the uses include making minuscule parts for wristwatches. At the same time, large panels with a certain surface finish may cover whole buildings.
A few industries that use stainless steel extensively:
Food and catering
Chemicals and pharmaceuticals
Medical equipment manufacturing
Architecture and construction
Home appliances
Offshore and shipbuilding
Automotive manufacturing
Energy and industry
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