differences between 1.4432 and 1.4571 stainless steel
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When selecting stainless steel for chemical processing, marine, power generation, or high-temperature applications, EN 1.4432 and EN 1.4571 stainless steel are two grades frequently compared by buyers.Although both belong to the molybdenum-alloyed austenitic stainless steel family, their chemical design, stabilization method, and service temperature behavior are significantly different.
This article explains the key differences between 1.4432 and 1.4571 stainless steel, with a focus on procurement decisions, application suitability, and cost considerations.
What material is 1.4432?
1.4432 (X2CrNiMo17-12-3) is an austenitic chromium-nickel-molybdenum stainless steel often regarded as a superior, more corrosion-resistant alternative to 316L (1.4404). It offers excellent corrosion resistance in chloride-containing and acidic environments, alongside good weldability, making it ideal for chemical, marine, and pulp/paper applications.
What is 1.4571 steel equivalent to?
European steel grade 1.4571 (also designated as X6CrNiMoTi17-12-2) is directly equivalent to American AISI 316Ti and Unified Numbering System UNS S31635. It is a titanium-stabilized version of standard grade 316 stainless steel.
1.4432 vs 1.4571 Stainless Steel: Material
| Grade | Common Name | Stabilization | Key Feature |
|---|---|---|---|
| 1.4432 | Similar to 316L (enhanced Mo) | Low carbon (L-grade) | Excellent corrosion resistance |
| 1.4571 | 316Ti | Titanium stabilized | Superior high-temperature resistance |
1.4432 vs 1.4571 stainless steel ：Chemical Composition
| Element (%) | 1.4432 | 1.4571 |
|---|---|---|
| Carbon (C) | ≤ 0.03 | ≤ 0.08 |
| Chromium (Cr) | 16.5 – 18.5 | 16.5 – 18.5 |
| Nickel (Ni) | 10.0 – 13.0 | 10.5 – 13.5 |
| Molybdenum (Mo) | 2.5 – 3.0 | 2.0 – 2.5 |
| Titanium (Ti) | - | ≥ 5×C |
| Nitrogen (N) | ≤ 0.11 | ≤ 0.10 |
1.4432 vs 1.4571 stainless steel ：Mechanical Properties (Typical Values)
| Property | 1.4432 | 1.4571 |
|---|---|---|
| Yield strength (MPa) | ≥ 200 | ≥ 220 |
| Tensile strength (MPa) | 500 – 700 | 500 – 750 |
| Elongation (%) | ≥ 40 | ≥ 40 |
1.4432 Vs 1.4571 Stainless Steel :Corrosion Resistance
1.4432 (316L) and 1.4571 (316Ti) stainless steels offer similar high-level corrosion resistance in many environments, but 1.4432 (higher molybdenum) often provides superior pitting resistance, while 1.4571 (titanium-stabilized) excels at elevated temperatures (>600°C) and resists intergranular corrosion without needing low-carbon processing. 1.4432 is better for general, highly corrosive, or cold-worked applications.
1.4432 Vs 1.4571 Stainless Steel :Temperature & Strength
1.4571 (316Ti) stainless steel, stabilized with titanium, is superior to 1.4432 (316L/316Lmod) for high-temperature applications up to 550°C–600°C due to better creep strength and resistance to carbide precipitation. While 1.4432 offers better corrosion resistance and ductility at ambient temperatures, 1.4571 is preferred for elevated-temperature structural integrity and welding.
1.4432 Vs 1.4571 Stainless Steel :Fabrication
1.4432 (316L) and 1.4571 (316Ti) are similar molybdenum-alloyed austenitics, but 1.4571 is titanium-stabilized for higher-temperature strength (>600°C) and better resistance to knife-line attack in welding, whereas 1.4432 offers better resistance to pitting/stress corrosion cracking and superior cold formability. 1.4432 is generally easier to machine and polish.
1.4432 Vs 1.4571 Stainless Steel :Welding
1.4432 (316L) and 1.4571 (316Ti) are both highly weldable molybdenum-alloyed stainless steels, suitable for welding using standard methods (TIG/MIG) without post-weld heat treatment. 1.4432 offers superior corrosion resistance via low carbon, while 1.4571 uses Titanium stabilization for better high-temperature strength.
316Ti (1.4571) Stainless Steel Supplier
If you have a project need for 316ti 1.4571 stainless steel , we welcome your order. GNEE has a large inventory of popular products for you to choose from. We process these bars into a variety of practical product forms, including sheet, coil, tube, bar, and wire. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.Email: info@gneestainless.com
FAQ
Q: What is the difference between 1.4571 and 1.4404?
Due to the absence of titanium inclusions, 1.4404 exhibits superior cold formability, compressive properties, and impact strength. Regarding surface finish, 1.4404 is suitable for smooth grinding and mirror polishing; in contrast, 1.4571 has limited polishing capabilities because titanium carbonitrides within the material can cause streaks or blemishes on the polished surface. While 1.4571 can withstand continuous high temperatures of up to 400°C, 1.4404 is generally recommended for use only up to a maximum of 300°C–350°C.
Q: What is the maximum operating temperature of 1.4571?
A: Oxidation resistance temperature: Up to 800°C - 850°C in atmospheric conditions. Applications in pressure vessels: According to relevant standards (such as AD 2000), its mechanical properties at high temperatures can be maintained to approximately 400°C while still exhibiting good design stress.
Q: Is 1.4571 material magnetic?
A: As an austenitic steel, 1.4571 is essentially non-magnetic in the annealed state. However, after cold working (such as cold rolling, drawing), slight machining magnetism may develop.
Q: How is the machinability of 1.4571?
A: Relatively difficult to machine. 1.4571 is harder than standard 304 and even 316. Due to the abrasive nature of titanium carbide particles, cutting tools wear out faster than when machining 316L. High-quality coated tools and sufficient coolant are required for machining.
Q: What precautions should be taken when welding 1.4571?
A: Weldability: Excellent, suitable for all standard welding methods. Filler metal: It is recommended to use a matching stable solder (such as 1.4576/318) or a low-carbon solder (such as 316LSi). Heat treatment: No post-weld annealing is required.
