X6CrNiMoTi17-12-2, also designated as EN 1.4571, is an austenitic stainless steel that corresponds internationally to AISI 316Ti. Developed from the traditional 316 (1.4401) alloy, it includes titanium additions that enhance resistance to intergranular corrosion under elevated temperatures.

1. Chemical Composition (Typical Mass Fractions)

C: ≤ 0.08%

Si: ≤ 1.00%

Mn: ≤ 2.00%

P: ≤ 0.045%

S: ≤ 0.015%

Cr: 16.5 – 18.5%

Ni: 10.5 – 13.5%

Mo: 2.0 – 2.5%

Ti: ≥ 5 × C, ≤ 0.7%

• Role of Titanium: Titanium binds with carbon to form stable TiC carbides, which prevent chromium carbide precipitation at grain boundaries—thus improving intergranular corrosion resistance, especially under high-temperature welding conditions.

2. Key Features and Advantages

• Outstanding intergranular corrosion resistance—particularly during and after welding or exposure to high temperatures.

• Excellent resistance to chloride—induced corrosion, making it ideal for marine and chemical settings.

• Good weldability—maintains corrosion resistance without the need for post-weld heat treatment.

• Higher high—temperature strength compared to 316L due to titanium stabilization.

• Good workability—suitable for forming, machining, and cold-working processes.

3. Mechanical Properties (at room temperature, based on hot-rolled plate)

• Tensile strength (Rm): 500 – 700 MPa

• Yield strength (Rp0.2): ≥ 200 MPa

• Elongation (A5): ≥ 40%

• Brinell hardness (HB): ≤ 215

4. Typical Applications

• Chemical Equipment: pressure vessels, heat exchangers, distillation columns, storage tanks

• Marine Engineering: ship components, seawater pipelines, desalination systems

• Mechanical Engineering: flanges, valves, fasteners

• Architectural Design: coastal bridges, exterior wall panels

• Pharmaceutical and Food Industries: hygienic processing equipment, reaction vessels, piping systems

5.Comparison with 316 and 316L

（1）1.4401 (316)

C Content：≤0.07%

Titanium Stabilized：No

Intergranular Corrosion Resistance：Moderate

High-Temperature Corrosion Resistance：General

Recommended Use：General corrosion-resistant applications

（2）1.4404 (316L)

C Content：≤0.03%

Titanium Stabilized：No

Intergranular Corrosion Resistance：Excellent (low carbon)

High-Temperature Corrosion Resistance：Moderate

Recommended Use：Welding environments

（3）1.4571 (316Ti)

C Content：≤0.08%

Titanium Stabilized：Yes

Intergranular Corrosion Resistance：Superior (Ti stabilized)

High-Temperature Corrosion Resistance：Better

Recommended Use：High-temperature welded environments

6. International Standards Equivalents

EN: X6CrNiMoTi17-12-2

DIN: 1.4571

AISI/ASTM: 316Ti

JIS: SUS316Ti

7. Processing and Handling Notes

• Use tools compatible with titanium-containing alloys to minimize work hardening during machining.

• For welding, matching titanium-stabilized filler metals such as ER316Ti are recommended.

• Unlike 316/316L, 316Ti offers more reliable intergranular corrosion resistance during thermal cycling and long-term high-temperature use, making it ideal for more aggressive thermal conditions.

8.Summarize

As the "titanium-enhanced" evolution of the 316 stainless steel family, X6CrNiMoTi17-12-2 combines superior intergranular corrosion resistance, thermal stability, and excellent workability. It is particularly well-suited for structural components exposed to prolonged high temperatures or frequent welding. Whether in offshore installations, chemical pipelines, or cleanroom environments within the pharmaceutical and food industries, EN 1.4571 demonstrates advantages that surpass conventional 316/316L stainless steel, offering a robust solution for high-demand engineering applications. For engineers and designers seeking enhanced material performance, X6CrNiMoTi17-12-2 is undoubtedly a compelling option.

9.Contact Us
If you're sourcing X6CrNiMoTi17-12-2 or other common metals, we supply bars, plates, wires, and tubes in a variety of specifications. Custom cutting, heat treatment, and surface finishing services are also available.
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