ASTM A312 TP304L Seamless stainless steel pipe for high temperature service
ASTM A312, TP304L Stainless Steel Pipe
Material Description
UNS S30403
EN Number 1.4306, 1.4307
Chemical Composition, %
| C | Mn | P | S | Si | Cr | Ni |
| 0.035 | 2.0 | 0.045 | 0.03 | 1.0 | 18.0-20.0 | 8.0-12.0 |
TP304L is an austenitic stainless chromium-nickel steel with a low carbon content.
Corrosion Resistance
- Organic acids at moderate temperatures
- Salt solutions, e.g. sulphates, sulphides and sulphites
- Caustic solutions at moderate temperatures
TP304L has better resistance than normal type ASTM TP304 to oxidizing agents, such as nitric acid.
TP304L has a low carbon content and therefore better resistance to intergranular corrosion than steels of type ASTM TP304.
The steel may be sensitive to pitting and crevice corrosion even in solutions of relatively low chloride content. Molybdenum-alloyed steels have better resistance improves with increasing molybdenum content.
Austenitic steels are susceptible to stress corrosion cracking (SCC). This may occur at temperatures above about 60°C (140°F) if the steel is subjected to tensile stresses and at the same time comes into contact with certain solutions, particularly those containing chlorides. Such service conditions should therefore be avoided. Conditions when plants are shut down must also be considered, as the condensates which are then formed can develop conditions that leads to both stress corrosion cracking (SCC) and pitting.
Application
Heat exchanger tubing, condenser tubing, pipelines, cooling and heating coils in the chemical, petrochemical, fertilizer, pulp and paper and nuclear power industries, as well as in the production of pharmaceuticals, foods and beverages.
Seamless Tube Information
Specification: ASTM A312 / ASME SA312, EN10216-5, DIN17458
Outside Diameter: 325-1067 mm
Wall Thickness: 9.53-140 mm
Length: On the request
Production procedure
