ASTM A268 TP430Ti ferritic martensitic stainless steel seamless pipe
ASTM A268 TP430Ti ferritic martensitic stainless steel seamless pipe
ASTM A268 TP430Ti is a seamless ferritic stainless steel tube suitable for general corrosion and high-temperature applications. The "Ti" designation indicates titanium stabilization. Key properties include magnetic properties, good oxidation resistance, and suitability for applications such as heat exchangers, exhaust systems, and industrial furnaces. This material is manufactured without the use of filler metal and requires specific chemical and mechanical properties verified through tests such as tensile, hardness, and expansion testing.
What is SA 268 TP 430 material?
Martensitic stainless steel grade
SA 268 TP 430 material is a martensitic stainless steel grade. SA 268 TP 430 boiler tubes are primarily used in applications requiring high mechanical properties, such as hardness and resistance to crevice and stress corrosion. They are also used in other specialized applications within the oil and gas industry, among others.
ASTM A268 covers various grades of stainless steel pipe with nominal wall thicknesses suitable for general corrosion resistance and high-temperature environments. Most of these grades, commonly referred to as "straight chrome" types, are ferromagnetic. TP430Ti (UNS S43036) is an upgraded version of standard 430 (UNS S43000), with the addition of titanium to improve intergranular corrosion resistance and weldability. It is a titanium-stabilized ferritic stainless steel.
Why choose ASTM A268 TP430Ti seamless stainless steel pipe?
Economical and efficient: Compared to austenitic stainless steels like 304, it contains no or very low nickel, significantly reducing product costs.
Strong resistance to chloride stress corrosion cracking: This is one of the greatest advantages of ferritic stainless steel, making it less susceptible to stress corrosion cracking in coastal atmospheres and certain chemical environments containing chloride ions.
High stability: The titanium content in its chemical composition eliminates intergranular corrosion issues within the welding and sensitization temperature ranges, thereby improving the reliability of welded structures.
Physical advantages: Excellent thermal conductivity and low coefficient of thermal expansion.
Seamless construction: Provides higher pressure integrity, a smoother internal surface reduces media retention, and the absence of longitudinal weld defects makes it suitable for higher pressure or more demanding applications.
ASTM A268 TP430Ti Stainless Steel Seamless Tube Chemical Composition
| Element | C | Mn | Si | P | S | Cr | Ni |
| TP410 | 0.15 | 1.0 | 1.0 | 0.040 | 0.030 | 11.5-13.5 | 0.75 |
ASTM A268 TP410Ti Stainless Steel Seamless Tube Mechanical Properties
| Tensile Stress, Mpa | Yield Stress, MPa | Elongation, % |
| 60[415] | 35[240] | 20 |
ASTM A268 TP410Ti Seamless Stainless Steel Pipe Fabrication
Cold Forming: Limited ductility, avoid severe deformation; bend radius ≥ 2 times the wall thickness (to prevent cracking)
Heat Treatment: Annealing temperature: 780–850°C → rapid cooling (to prevent brittleness at 475°C)
Cutting: Plasma/laser cutting is superior to mechanical cutting (to reduce edge brittleness)
Main Applications of ASTM A268 TP410Ti Seamless Stainless Steel Pipe
High-temperature oxidation-resistant components: automotive exhaust systems (manifolds, mufflers); furnace heat exchangers, burner nozzles (≤ 800°C).
Corrosion-resistant containers and piping: nitric acid storage and transportation equipment (concentration ≤ 20%); food processing equipment (acetic acid environments); wine fermentation tanks.
Architectural Decoration: Corrosion-resistant roofing/curtain walls (in coastal high-humidity environments); cost-reducing alternative to 304 stainless steel (when strength is not a requirement).
Applications
Heat Exchange and Process Equipment: Used in heat exchangers, superheaters, and various chemical processing equipment.
Automotive: Commonly used in exhaust systems and other automotive components requiring high-temperature resistance.
Industrial and Furnace Equipment: Suitable for general industrial applications such as ventilation ducting and equipment in industrial furnaces and heat treatment systems.
Manufacturing and Testing
Manufacturing: Produced using a seamless process, where the steel is formed through a die without welds, resulting in increased strength and uniformity.
Testing: The material must undergo several mechanical tests to ensure it meets specification requirements, including:
Tensile testing
Flagging testing (for seamless pipe)
Hardness testing
Reverse flattening testing
Hydrostatic or non-destructive spark testing
Gnee Steel specializes in the production of a wide range of stainless steel products. Gnee Steel's product packaging includes: Steel Strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during ocean shipping, and then secured with steel strapping. Wooden Cases/Crates: Pipes are typically packaged in wooden cases or crates to protect the pipes during transportation, especially those that are longer or have larger diameters. Seaworthy Export Packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin Packaging: This prevents rain, seawater, and other external factors from penetrating the export crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in the aerospace, chemical, power, automotive, and nuclear energy sectors, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing or customized alloy material solutions, please contact us for a quote: ru@gneesteelgroup.com
