Seamless stainless ferritic steel tubes 1.4510 / OH17T / X3CrTi17, 0H17T, AISI 430Ti

What are seamless stainless ferritic steel tubes 1.4510 / AISI 430Ti?

Seamless stainless ferritic steel tubes 1.4510 (also listed as X3CrTi17, OH17T / 0H17T or commonly AISI 430Ti) are magnetic, chromium-rich, titanium-stabilised ferritic stainless steel tubes manufactured without a longitudinal weld. The titanium stabiliser ties up carbon and reduces the risk of chromium carbide precipitation during heating or welding, which helps keep corrosion resistance in heat-affected zones. These tubes are part of the ferritic stainless family and provide a balance of corrosion resistance, formability and heat resistance suitable for many industrial and everyday uses.

Composition and standard designations

This grade is a low-carbon, ferritic stainless steel with about 16–18% chromium and titanium added in small amounts to stabilise the structure. It is sold under several equivalent names used across Europe and the United States: EN designation 1.4510 (sometimes referenced as X3CrTi17), and the US/common name AISI 430Ti. You will also see regional markings such as OH17T or 0H17T. In product listings we use these synonyms interchangeably so customers can find the right material for their application.

Key properties

• Corrosion resistance: Good resistance in atmospheric and mildly corrosive environments; better than plain carbon steel but not as resistant as many austenitic stainless grades in aggressive chloride environments.
• Magnetic: Ferritic microstructure means the material is magnetic.
• Heat resistance: Stable at elevated temperatures and less prone to sensitisation thanks to titanium stabilisation.
• Formability and fabrication: Good for bending, drawing and moderate forming; cannot be hardened by heat treatment (hardening is by cold work).
• Weldability: Weldable with standard ferritic fillers; titanium stabilisation helps preserve corrosion resistance in weld zones when handled correctly.

Why choose seamless ferritic stainless tubes?

Seamless tubes are produced without a longitudinal weld, giving them a smooth internal surface and uniform structure. That makes them particularly suitable where strength under pressure, cleanliness of the bore and reliable dimensional tolerances are important — for example in heat exchangers, radiator cores or fluid transfer lines. Choosing the ferritic grade 1.4510 / AISI 430Ti offers a cost-effective stainless option when austenitic grades are not required for extreme corrosion resistance.

Common applications and industries

Seamless stainless ferritic tubes in 1.4510 / AISI 430Ti are used across a wide range of sectors, from small-scale DIY and garage projects to heavy industrial applications:

• HVAC and heating systems — radiator and heat exchanger tubes
• Building and construction — architectural trim, guttering, and structural components where a ferritic stainless finish is acceptable
• Automotive — exhaust systems, trim, and other components where magnetic stainless is acceptable
• Appliances and domestic equipment — oven linings, cooker parts and other heat-exposed components
• General engineering and fabrication — machine parts, ducts and protective tubing
• Light industrial process systems — where moderate corrosion resistance and high-temperature stability are needed
• Marine and offshore — suitable for some atmospheric and splash-zone uses, but not generally recommended for continuous seawater immersion or highly chloride-rich environments

Working with 1.4510 / OH17T / AISI 430Ti tubes

A few practical points for designers, fabricators and end users:

• Forming: Good bendability and suitability for common tube forming operations; use tooling appropriate for ferritic stainless steels.
• Welding: Standard ferritic welding procedures apply. Titanium stabilisation reduces the risk of sensitisation, but good welding practice and suitable filler materials should be used to maintain corrosion performance.
• Cleaning and finishing: Can be polished and finished to decorative grades; pickling and passivation are commonly used to restore corrosion resistance after fabrication.
• Limitations: Not as corrosion-resistant as 300-series austenitic stainless steels in aggressive chemical or chloride environments; not hardenable by heat treatment (strength increases by cold work).

Who should consider these tubes?

Seamless ferritic stainless steel tubes 1.4510 / AISI 430Ti are a good choice for fabricators, HVAC contractors, radiator/heat-exchanger manufacturers, appliance makers, automotive engineers, maintenance teams and hobbyists who need a robust, heat-resistant and magnetic stainless tube with good formability. If your application involves prolonged exposure to chlorides or highly acidic media, consult our technical team about more corrosion-resistant alternatives.

Summary

Seamless stainless ferritic steel tubes 1.4510 / OH17T / X3CrTi17 / AISI 430Ti deliver a cost-effective, titanium-stabilised ferritic stainless option with good heat resistance, reasonable corrosion performance in many environments and excellent manufacturability. They are ideal where a balance of strength, temperature stability and magnetic properties is required — from small workshop projects to industrial heat-exchange systems.