EN 1.4017 | X6CrNi17‑1 Martensitic Stainless Steel

Apr 02, 2026

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1.4017 stainless steel, commonly known as 430 Ti or UNS S43035, is a titanium-stabilized ferritic stainless steel that offers improved weldability and resistance to intergranular corrosion compared to standard 430. With its titanium addition and lower carbon content, it provides a good balance of corrosion resistance, formability, and cost-effectiveness, making it particularly suitable for applications where welding is required. Its enhanced stability makes it a preferred choice for automotive exhaust systems, heat exchangers, and other applications where standard 430's weldability limitations are a concern.

Standard	Equivalent Grade
EN (Europe)	1.4017
ASTM/AISI (USA)	430 Ti, UNS S43035
Common Name	430 Ti, 439 (similar)

Element	C	Si	Mn	P	S	Cr	Ti
Content (%)	≤ 0.05	≤ 1.0	≤ 1.0	≤ 0.04	≤ 0.03	16.0 - 18.0	0.10 - 0.60

Property	Yield Strength (Rp0.2)	Tensile Strength (Rm)	Elongation (A)	Hardness (HB)
Typical Value	≥ 230 MPa	450 - 600 MPa	≥ 22%	≤ 200

Excellent Weldability: Titanium stabilization prevents chromium carbide formation during welding, eliminating sensitization and the need for post-weld heat treatment, making it suitable for welded assemblies.

Good Corrosion Resistance in Mild Environments: Performs well in indoor atmospheres, fresh water, and automotive exhaust environments, with better resistance to intergranular corrosion than unstabilized 430.

High-Temperature Oxidation Resistance: Good resistance to oxidation and scaling at elevated temperatures up to about 750°C, suitable for exhaust system components.

Magnetic and Cost-Effective: Strongly magnetic and more economical than nickel-containing austenitic grades, offering a balance of performance and cost.

Automotive Exhaust Systems: Mufflers, catalytic converter housings, tailpipes, and heat shields.

Heat Exchangers: Components in automotive and HVAC systems requiring good thermal conductivity.

Decorative Trim: Interior and exterior architectural elements where aesthetics and moderate corrosion resistance are required.

Appliances: Dishwasher interiors, oven linings, and other household equipment.

Kitchen Equipment: Sinks, countertops, and food preparation surfaces in less demanding environments.

Industrial Equipment: Tanks and vessels for mild chemical service where welding is required.

430 Ti is a titanium-stabilized version of 430 with improved properties. The addition of titanium provides significantly better resistance to intergranular corrosion after welding or high-temperature exposure, making it more suitable for welded components like exhaust systems. 430 Ti also has lower carbon content (≤0.05% vs. ≤0.12%), which further enhances weldability. While both are ferritic and magnetic, 430 Ti offers improved formability and better weld integrity. Standard 430 may suffer from chromium carbide formation in the heat-affected zone during welding, limiting its use in welded applications. For non-welded applications, standard 430 is often sufficient and more economical.

430 Ti has good weldability due to its titanium stabilization. Key considerations include:

Can be welded using common methods including TIG, MIG, and resistance welding

Low heat input welding techniques are recommended to minimize grain growth in the heat-affected zone

Matching filler metals are available, though austenitic fillers like 309L are often used for better ductility

Preheating is generally not required for thin sections

Post-weld annealing is not necessary for corrosion resistance

For decorative applications, laser welding may provide minimal heat-affected zone and good surface finish

Welding in the annealed condition provides optimal results

430 Ti offers good formability, though slightly less than standard 430 due to the titanium addition. Key considerations include:

Good for bending, drawing, and roll forming

Lower work hardening rate than austenitic grades

Annealing may be required after severe forming to restore ductility

Springback is typically lower than in austenitic grades

Lubrication is recommended for deep drawing operations

Can be polished to high surface finishes

GNEE Steel supplies cost-effective 430 Ti (1.4017) stainless steel in sheet, coil, tube, and strip forms, ideal for automotive exhaust systems and general industrial applications requiring good weldability. We provide full material certification (EN 10204 3.1) and processing support including cutting, bending, forming, and welding services. If you have any requirements, please feel free to contact us.