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Steel Grades
| Grade |
Applications |
| 1. Austenitic steels |
| TP 304 |
General purpose stainless steel with good corrosion resistance for most applications. Used for: Bar rails, Boat railings, Canopy supports, Chemical processing equipment, Chemical tubing, Column covers, Duct works, Feed-water tubes, Food preparation equipment, Food processing equipment, Heat exchanger tubes, Hypodermic needles, Ladders, Mechanical & structural components, Pharmaceutical processing equipment, Piping systems, Railings (architectural), Traffic barriers, Water pipes. |
| TP304 LN,316LN |
Boiler, super-heater,heat exchanger tubes |
| TP 304H |
Higher carbon content than 304L, for increased strength, particularly at elevated temperatures. |
| TP 304L |
Chemical plant and food processing equipment, where freedom from sensitisation is required in plate thicknesses |
| TP 316 / 316L |
Used where higher corrosion resistance is required. Boat railings, Canopy supports, Chemical tubing, Column covers, Duct works, Feed-water tubes, Food preparation equipment, Food processing equipment, Heat exchanger tubes, Hypodermic needles, Ladders, Mechanical & structural components, Pharmaceutical processing equipment, Piping systems, Railings, Street (urban) furniture, Textile tubing, Traffic barriers, Water pipes. |
| TP 316H |
Similar oxidation resistance to TP 316. Main areas of application: Heat exchangers, furnaces, chemical and petrochemical plant. |
| TP 321 |
Heat exchanger tubing, Chemical processing tubing, Pressure tank tubing. Suitable for heat resisting applications to 800℃. |
| TP 321H |
This is the high carbon version of TP 321 which ensures greater creep resistance. Behaves much the same as TP 321 in oxidation resistance. Main applications: Heat exchangers, furnaces, boilers in chemical and petrochemical plant. |
| TP 316Ti |
A titanium stabilised version of 316 used where good resistance to intergranular corrosion and high temperature strength is required. |
| TP 317/317L |
Chemical processing tubing, Dyeing equipment, Ink manufacturing equipment, Pulp & paper manufacturing equipment |
| 2. Super-Austenitic Steels |
| TP 904L |
High resistance to general corrosion in e.g. sulphuric and acetic acids, crevice corrosion, stress corrosion cracking, pitting in chloride bearing solutions. |
| 3. Ferritic and Martensitic steels |
| TP 405 |
Used for applications where hardening upon cooling from high temperatures must be avoided. Has excellent long-time stability up to 1200°F. |
| TP 410 |
General purpose grade for use in mildly corrosive environments |
| TP 430 |
Mechanical & structural tubing, Architectural tubing, Heat exchanger tubing, Condensers, Re-heaters, Evaporators. |
| 4. Duplex |
| S31803 |
Typically used in heat exchangers, gas scrubbers, fans, chemical tanks, flowlines, marine and refinery applications. |
| 5.Supper duplex |
| S32750 |
Superduplex is an austenitic ferritic iron cromium-nickel alloy with Molybdenim addition. |
| S32760 |
It has good resistance to pitting corrosion, and a high tensile strength. |
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