Acier inoxydable du gigaoctet 0Cr18Ni10Ti: Propriétés, Utilisations & Guide de comparaison

If you’re looking for a stainless steel that handles heat and resists corrosion—especially after welding—Acier inoxydable du gigaoctet 0Cr18Ni10Ti is a top contender. Mais qu'est-ce qui rend sa conception stabilisée en titane unique? Et quand devriez-vous le choisir plutôt que des grades courants comme SUS304? Ce guide détaille ses principales fonctionnalités, utilisations réelles, étapes de fabrication, and how it stacks up to other materials. À la fin, you’ll have all the info to pick the right steel for your project.

1. Material Properties of GB 0Cr18Ni10Ti

The performance ofGB 0Cr18Ni10Ti starts with its one-of-a-kindcomposition de l'alliage etaustenitic structure—paired with a critical feature: titanium stabilization. Let’s break down what makes it reliable:

Core Alloy Elements

• High chromium content (17.0-19.0%): Forms a protective oxide layer to fight rust and general corrosion.
• High nickel content (9.0-12.0%): Keeps the austenitic structure stable, boosting ductility and low-temperature toughness.
• Titanium stabilization (0.20-0.80% De): Binds with carbon in the alloy, preventing chromium carbides from forming during high-heat processes (like welding). This eliminates a major cause of corrosion intergranulaire (a common flaw in non-stabilized steels).
• Carbon content (maximum 0.08%): Balances strength and weldability without compromising corrosion resistance.

Key Mechanical Strength Data

A real example: A Shanghai boiler manufacturer usesGB 0Cr18Ni10Ti for heat exchanger tubes. The material’s high elongation (≥40%) lets tubes bend into tight shapes, alors quetitanium stabilization ensures they don’t corrode—even after welding and repeated exposure to 300°C hot water.

2. Applications of GB 0Cr18Ni10Ti

GB 0Cr18Ni10Ti shines in projects that involve heat, soudage, or mild corrosive environments—where non-stabilized steels (like SUS304) might fail. Here are its top uses, with practical cases:

• Chemical Processing Plants: Ideal for pipes and reactors that handle mild acids (par ex., acetic acid) et des températures élevées. A Jiangsu chemical plant replaced SUS304 pipes with GB 0Cr18Ni10Ti—the new pipes showed no intergranular corrosion after 2 years of welding and heat cycles.
• Food Processing Equipment: Used for baking ovens, sterilizers, and mixing tanks. A Guangdong bakery chose GB 0Cr18Ni10Ti for oven interiors—its heat resistance (up to 800°C) and easy-to-clean surface prevent food sticking and rust.
• Composants aérospatiaux: Found in internal parts of aircraft (par ex., conduites de carburant) that need to withstand temperature changes. A Chinese aerospace supplier reported that GB 0Cr18Ni10Ti parts meet strict weight and durability requirements, with no corrosion issues at high altitudes.
• Dispositifs médicaux: Used for surgical instrument trays and autoclave chambers. A Wuhan hospital uses GB 0Cr18Ni10Ti trays—their resistance to high-temperature sterilization (121°C) and non-toxicity keep instruments clean and safe.
• Construction Materials: Used for high-temperature exhaust systems in commercial buildings. A Beijing mall installed GB 0Cr18Ni10Ti exhaust ducts—they’ve resisted corrosion from city pollution and heat for 5 années.
• Other uses: Pièces automobiles (exhaust manifolds for heavy-duty trucks), Electrical Appliances (oven heating elements), et Sanitary Fittings (high-temperature water faucets).

3. Manufacturing Processes for GB 0Cr18Ni10Ti

ProduireGB 0Cr18Ni10Ti requires precise steps to preserve itstitanium stabilization etaustenitic structure. Here’s how it’s made:

1. Hot Rolling: Heat the alloy to 1100-1200°C and roll it into thick plates or coils. This step softens the material for shaping—critical for making large parts like reactor shells. A Hebei steel mill uses hot rolling to produce 20mm-thick GB 0Cr18Ni10Ti plates for chemical plants.
2. Cold Rolling: Use room-temperature pressure to reduce thickness (par ex., to 1mm for oven sheets). Cold rolling improves surface smoothness but hardens the metal—so annealing is needed next.
3. Recuit: Heat to 950-1050°C, hold for 30 minutes, then cool rapidly. This restores ductility and ensures titanium fully binds with carbon (key for titanium stabilization). A Zhejiang factory anneals all GB 0Cr18Ni10Ti sheets to prevent cracking during bending.
4. Pickling: Dip in nitric acid to remove oxide scales from rolling. Pickling brightens the surface and enhances corrosion resistance—essential for food or medical parts.
5. Drawing/Extrusion: Pull the alloy through dies to make wires or tubes. Drawn GB 0Cr18Ni10Ti wires are used for medical instrument springs, while extruded tubes work in chemical pipes.
6. Usinage: Cut the material into final parts (par ex., valve handles). Use high-speed steel tools—its ductility means it can be drilled or turned easily without chipping. A Shenzhen workshop recommends a cutting speed of 180 m/min for best results.
7. Forgeage: Hammer the alloy into complex shapes (par ex., pump casings). Forging at 900-1000°C ensures parts keep their strength and titanium stabilization avantages.

6. Standards and Specifications for GB 0Cr18Ni10Ti

To ensure you’re getting high-quality, genuineGB 0Cr18Ni10Ti, always check compliance with these standards:

• GB/T 20878: The core Chinese standard for stainless steels—it defines the alloy’s composition de l'alliage (including titanium content), résistance mécanique, and testing methods.
• ASTM A240: NOUS. standard—GB 0Cr18Ni10Ti is equivalent to ASTM 321, so it meets this standard’s requirements for flat products (assiettes, feuilles).
• DANS 10088: European standard—equivalent grade is X6CrNiTi18-10, making it suitable for EU-based projects (par ex., food processing plants in Germany).
• ISO Standards: OIN 15510 aligns with GB 0Cr18Ni10Ti for pressure equipment (par ex., réacteurs chimiques).

Always ask suppliers for:

• Certification des matériaux (par ex., Mill Test Report) to verify titanium content (must be 0.20-0.80%) and mechanical properties.
• Conformance Testing résultats (par ex., GB/T 4334.5 for intergranular corrosion resistance—critical for welded parts).
• Technical Data Sheets (TDS) with details on annealing temperatures and welding guidelines.

Contrôle de qualité is key: A Fujian supplier once sold fakeGB 0Cr18Ni10Ti with too little titanium—parts developed intergranular corrosion after welding. Always confirm compliance before buying.

7. Comparaison: GB 0Cr18Ni10Ti vs. Autres matériaux

How doesGB 0Cr18Ni10Ti stack up against common stainless steels and alloys? Below is a side-by-side comparison focusing on key factors like corrosion resistance, force, et le coût:

Par exemple: If you’re building a welded chemical reactor, GB 0Cr18Ni10Ti is better than SUS304 (no intergranular corrosion) and cheaper than SUS316. If you’re making a home kitchen sink, though, SUS304 is more cost-effective.

Yigu Technology’s Perspective

Chez Yigu Technologie, we’ve suppliedGB 0Cr18Ni10Ti to chemical, aérospatial, and food clients for 14 années. Its biggest strength istitanium stabilization—it eliminates the need for post-weld heat treatment, saving clients time and money. Our data shows it reduces welded part failures by 35% contre. SUS304 in high-heat projects. We also offer custom machining to ensure parts fit tight tolerances, like aerospace fuel lines. For clients needing reliable performance in welded, hot environments, it’s our go-to recommendation.

FAQ

1. Can GB 0Cr18Ni10Ti be used in seawater?
   No—its Pitting Resistance Equivalent (PRE) de 18 is too low for saltwater. It will develop pitting corrosion over time. For marine applications, use SUS316 or duplex stainless steel instead.
2. Do I need post-weld heat treatment for GB 0Cr18Ni10Ti?
   Non-titanium stabilization binds carbon, preventing intergranular corrosion. This skips the need for post-weld annealing, unlike SUS304 (which requires heat treatment after welding for corrosive projects).
3. Is GB 0Cr18Ni10Ti safe for food contact?
   Yes—it meets global food safety standards (par ex., China’s GB 4806.9). Its non-toxic composition and resistance to high temperatures make it ideal for baking ovens and food sterilizers.