If you’re looking for a stainless steel that handles heat and resists corrosion—especially after welding—GB 0Cr18Ni10Ti Stainless Steel est un candidat supérieur. But what makes its titanium-stabilized design unique? And when should you choose it over common grades like SUS304? This guide breaks down its key features, Utilise du monde réel, manufacturing steps, 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
La performance deGB 0Cr18Ni10Ti starts with its one-of-a-kindalloy composition etstructure austénitique—paired with a critical feature: stabilisation du titane. 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.
- Contenu élevé en nickel (9.0-12.0%): Keeps the structure austénitique 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).
- Teneur en carbone (max 0.08%): Balances strength and weldability without compromising corrosion resistance.
Key Mechanical Strength Data
| Propriété | Valeur typique | Test Standard |
|---|---|---|
| Limite d'élasticité | ≥205 MPa | GB/T 228.1 |
| Résistance à la traction | ≥520 MPa | GB/T 228.1 |
| Élongation | ≥40% | GB/T 228.1 |
| Dureté (Brinell) | ≤187 HB | GB/T 231.1 |
| Densité | 7.93 g / cm³ | GB/T 20878 |
Un vrai exemple: A Shanghai boiler manufacturer usesGB 0Cr18Ni10Ti for heat exchanger tubes. The material’s high elongation (≥40%) lets tubes bend into tight shapes, alors questabilisation du titane 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 (Comme Sus304) might fail. Voici ses utilisations les plus élevées, with practical cases:
- Plantes de traitement chimique: Ideal for pipes and reactors that handle mild acids (Par exemple, acetic acid) and high temperatures. 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.
- Équipement de transformation des aliments: Used for baking ovens, sterilizers, and mixing tanks. A Guangdong bakery chose GB 0Cr18Ni10Ti for oven interiors—its heat resistance (jusqu'à 800 ° C) and easy-to-clean surface prevent food sticking and rust.
- Composants aérospatiaux: Found in internal parts of aircraft (Par exemple, 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), Appareils électriques (oven heating elements), et Accessoires sanitaires (high-temperature water faucets).
3. Manufacturing Processes for GB 0Cr18Ni10Ti
ProducingGB 0Cr18Ni10Ti requires precise steps to preserve itsstabilisation du titane etstructure austénitique. Voici comment c'est fait:
- Roulement chaud: 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.
- Roulement froid: Use room-temperature pressure to reduce thickness (Par exemple, to 1mm for oven sheets). Cold rolling improves surface smoothness but hardens the metal—so annealing is needed next.
- 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 stabilisation du titane). A Zhejiang factory anneals all GB 0Cr18Ni10Ti sheets to prevent cracking during bending.
- Décapage: Dip in nitric acid to remove oxide scales from rolling. Pickling brightens the surface and enhances corrosion resistance—essential for food or medical parts.
- 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.
- Usinage: Cut the material into final parts (Par exemple, 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.
- Forgeage: Hammer the alloy into complex shapes (Par exemple, tas de pompes). Forging at 900-1000°C ensures parts keep their strength and stabilisation du titane avantages.
6. Standards and Specifications for GB 0Cr18Ni10Ti
Pour vous assurer que vous obtenez de haute qualité, genuineGB 0Cr18Ni10Ti, always check compliance with these standards:
- GB/T 20878: The core Chinese standard for stainless steels—it defines the alloy’s alloy composition (including titanium content), mechanical strength, et méthodes de test.
- 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 exemple, food processing plants in Germany).
- Normes ISO: ISO 15510 aligns with GB 0Cr18Ni10Ti for pressure equipment (Par exemple, réacteurs chimiques).
Always ask suppliers for:
- Certification matérielle (Par exemple, Mill Test Report) Pour vérifier le contenu en titane (must be 0.20-0.80%) et propriétés mécaniques.
- Conformance Testing results (Par exemple, 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 est la clé: 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
CommentGB 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 coûter:
| Matériel | Résistance à la corrosion (PRE) | Limite d'élasticité | Avantage clé | Coût (contre. GB 0Cr18Ni10Ti) | Mieux pour |
|---|---|---|---|---|---|
| GB 0Cr18Ni10Ti | 18 | 205 MPA | Titanium stabilization (no post-weld corrosion) | 100% | High-heat/welded projects (boilers, tuyaux) |
| Sus304 | 18 | 205 MPA | Coût inférieur | 85% | Environnements légers (kitchens, appareils) |
| SUS316 | 25 | 177 MPA | Better saltwater resistance | 140% | Marine or acidic environments (desalination) |
| SUS410 (Martensitique) | 12 | 485 MPA | Résistance plus élevée | 70% | Low-corrosion, pièces à haute résistance (knives) |
| SUS430 (Ferritique) | 16 | 240 MPA | Faible coût | 75% | Oven liners, pièces décoratives |
| Acier inoxydable duplex | 35 | 450 MPA | Force + résistance à la corrosion | 180% | Offshore oil pipes |
| Alliages en titane | 50 | 860 MPA | Ultra-high corrosion resistance | 500% | Aérospatial, médical (extreme environments) |
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.
Perspective de la technologie Yigu
À la technologie Yigu, Nous avons fourniGB 0Cr18Ni10Ti to chemical, aérospatial, and food clients for 14 années. Its biggest strength isstabilisation du titane—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
- 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. - Do I need post-weld heat treatment for GB 0Cr18Ni10Ti?
Non-stabilisation du titane binds carbon, preventing intergranular corrosion. This skips the need for post-weld annealing, unlike SUS304 (which requires heat treatment after welding for corrosive projects). - Is GB 0Cr18Ni10Ti safe for food contact?
Yes—it meets global food safety standards (Par exemple, China’s GB 4806.9). Its non-toxic composition and resistance to high temperatures make it ideal for baking ovens and food sterilizers.
