GB 00Cr17Ni14Mo2 Stainless Steel: Proprietà, Usi & Guida degli esperti

If you work in industries like chemical processing or marine engineering, you need a stainless steel that can handle salty, acidic, or harsh environments.GB 00Cr17Ni14Mo2 Stainless Steel is designed for exactly that—but what makes it different from other options? This guide breaks down its key traits, Applicazioni del mondo reale, manufacturing steps, and how it compares to other metals. Alla fine, you’ll know if it’s the right choice for your project.

1. Material Properties of GB 00Cr17Ni14Mo2

The strength and corrosion resistance ofGB 00Cr17Ni14Mo2 come from its uniquealloy composition EStruttura austenitica—a combination that balances durability and ductility.

Key Alloy Elements

• High chromium content (16.0-18.0%): Forms a protective oxide layer to fight rust and general corrosion.
• Alto contenuto di nichel (12.0-15.0%): Stabilizza la struttura austenitica, keeping the material tough even at low temperatures.
• High molybdenum content (2.0-3.0%): Boosts resistance to pitting and crevice corrosion—critical for salty or acidic environments.
• Ultra-low carbon (max 0.03%): Reduces the risk of intergranular corrosion (a common issue in welded stainless steels).

Mechanical Strength Data

Un esempio del mondo reale: A Jiangsu chemical plant usesGB 00Cr17Ni14Mo2 for acid storage tank lids. The material’s high elongation (≥40%) lets the lids be shaped into tight seals, while its low hardness makes them easy to open and close daily without wear.

2. Applications of GB 00Cr17Ni14Mo2

GB 00Cr17Ni14Mo2 excels in harsh environments where standard stainless steels (like GB 0Cr18Ni9) fail. Ecco i suoi usi migliori, with practical cases:

• Attrezzatura di lavorazione chimica: Used for reactors, condutture, and valves that handle sulfuric or phosphoric acid. A Shandong fertilizer plant replaced old carbon steel pipes with GB 00Cr17Ni14Mo2—Il costi di manutenzione sono diminuiti 50% because the new pipes showed no corrosion after 3 anni.
• Applicazioni marine: Ideal for ship hulls, seawater cooling systems, and offshore platform components. A Zhoushan shipyard used GB 00Cr17Ni14Mo2 for a fishing vessel’s propeller shaft—after 2 anni in mare, there was no pitting or rust, even without extra coatings.
• Desalination Plants: Critical for reverse osmosis membranes and brine pumps. A Hainan desalination plant reported that GB 00Cr17Ni14Mo2 parts lasted 8 anni, vs. 3 years for the previous alloy (GB 0Cr18Ni9).
• Attrezzatura per la trasformazione alimentare: Safe for acidic foods (PER ESEMPIO., pickles, citrus juices) and cleaning chemicals. A Guangdong fruit juice factory uses GB 00Cr17Ni14Mo2 mixing tanks—no metal contamination was found in the juice, meeting national food safety standards.
• Attrezzatura farmaceutica: Used for sterile tanks and drug delivery systems. A Shanghai pharmaceutical company chose this alloy because its ultra-low carbon content prevents metal particles from leaching into drugs.
• Other uses: Industria petrolifera e del gas (subsea wellhead parts), Dispositivi medici (surgical tools for corrosive sterilizers), E Industria della polpa e della carta (bleaching equipment).

3. Manufacturing Processes for GB 00Cr17Ni14Mo2

ProducingGB 00Cr17Ni14Mo2 requires precise steps to preserve its low-carbon and high-molybdenum benefits. Here’s the process breakdown:

1. Rotolamento caldo: Heat the alloy to 1100-1200°C and roll it into thick plates or coils. This step softens the material for further processing. A Hebei steel mill uses hot rolling to make 15mm-thick GB 00Cr17Ni14Mo2 plates for chemical reactors.
2. Rotolamento a freddo: Use room-temperature pressure to reduce thickness (PER ESEMPIO., to 1mm for desalination plant membranes). Cold rolling improves surface smoothness but hardens the metal—annealing is needed next.
3. Ricottura: Heat to 1010-1150°C, hold for 30-60 minuti, Quindi cuocere d'acqua. This restores ductility and ensures the Struttura austenitica stays balanced. A Zhejiang factory anneals all GB 00Cr17Ni14Mo2 sheets to prevent cracking during bending.
4. Pickling: Dip in a mix of nitric and hydrofluoric acid to remove oxide scales. Pickling brightens the surface and enhances Resistenza alla corrosione—essential for marine or chemical parts.
5. Drawing/Extrusion: Pull the alloy through dies to make wires or tubes. Drawn GB 00Cr17Ni14Mo2 wires are used for pharmaceutical filters, while extruded tubes work in seawater pipelines.
6. Lavorazione: Cut the material into final parts (PER ESEMPIO., valve handles). Use carbide tools with a cutting speed of 150-200 m/min—its ductility means it can be drilled or turned without chipping.
7. Forgiatura: Hammer the alloy into complex shapes (PER ESEMPIO., involucri di pompaggio). Forging at 950-1050°C ensures the parts keep their strength and corrosion resistance.

4. Corrosion Resistance of GB 00Cr17Ni14Mo2

Corrosion is the biggest threat to industrial materials—andGB 00Cr17Ni14Mo2 is built to fight it. Ecco come si comporta:

• Resistenza a schieramento: Excellent—its high molybdenum content prevents small holes (Accorciamento) in saltwater or acidic solutions. It has a Pitting Resistance Equivalent (PRE) Di 25, far higher than GB 0Cr18Ni9 (PRE 18) and equal to SUS316.
• Corrosione della fessura: Strong resistance in tight spaces (PER ESEMPIO., bolted joints or gasket seals). A test in 3.5% saltwater showed no crevice corrosion on GB 00Cr17Ni14Mo2 Dopo 3000 ore.
• Corrosione intergranulare: Rischio minimo, thanks to its ultra-low carbon content. It passes the GB/T 4334.5 test (a strict intergranular corrosion test) even after welding—no need for extra heat treatment in most cases.
• Stress corrosione cracking (SCC): Resists cracking under tension in chloride-rich environments (PER ESEMPIO., Pool d'acqua salata). A coastal power plant used GB 00Cr17Ni14Mo2 for cooling system pipes—after 5 anni, there were no cracks, unlike the old SUS304 pipes that failed after 2 anni.

To boost protection further:

• Fare domanda a passivazione (citric acid treatment) to strengthen the oxide layer.
• Avoid using it in extremely high-temperature (above 600°C) corrosive environments—test first if needed.
• Refer to corrosion resistance charts (PER ESEMPIO., from GB/T 10125) to confirm suitability for your specific application.

5. Welding GB 00Cr17Ni14Mo2

GB 00Cr17Ni14Mo2 is easy to weld, but its low-carbon and high-molybdenum composition requires specific steps to maintain performance:

• Saldabilità: Excellent—its Struttura austenitica prevents brittleness in welds, and ultra-low carbon reduces intergranular corrosion risk.
• Recommended Welding Processes:
  • Gas Tungsten Arc Welding (GTAW/TIG): Best for thin sheets (PER ESEMPIO., Attrezzatura farmaceutica) because it creates clean, precise welds with minimal heat input.
  • Metal Inert Gas Welding (ME): Fast for thick plates (PER ESEMPIO., scafi marini).
• Barre di saldatura: Use matching low-carbon rods like ER316L (for GTAW) or E316L-16 (for SMAW). These rods keep the weld’s carbon content low and maintain molybdenum levels—critical for corrosion resistance.
• Gas di saldatura: Use pure argon (99.99%) for TIG welding to prevent oxidation. For MIG, use argon with 2-5% carbon dioxide to improve weld penetration.
• Trattamento termico post-salvato: Usually not needed for most applications, thanks to the ultra-low carbon content. If the weld will be in highly corrosive environments, anneal at 1050°C for 30 minutes to ensure maximum protection.
• Ispezione di saldatura: Use visual inspection (for surface flaws) or ultrasonic testing (Ut) for internal defects. Seguire welding standards like GB/T 985.1 and AWS D1.6.
• Sicurezza della saldatura: Wear a heat-resistant jacket and face shield—GB 00Cr17Ni14Mo2 produces sparks during welding that can cause burns if not protected against.

6. Standards and Specifications for GB 00Cr17Ni14Mo2

Per assicurarti di ottenere di alta qualità, genuineGB 00Cr17Ni14Mo2, always check compliance with these standards:

• GB/T 20878: The core Chinese standard for stainless steels—it defines the alloy’s composition, Proprietà meccaniche, e metodi di test.
• ASTM A240: NOI. standard—GB 00Cr17Ni14Mo2 is equivalent to ASTM 316L, so it meets this standard’s requirements for flat products (piatti, fogli).
• IN 10088: European standard—equivalent grade is X2CrNiMo17-12-2, making it suitable for EU-based projects.
• Standard ISO: Iso 15510 aligns with GB 00Cr17Ni14Mo2 for pressure equipment (PER ESEMPIO., Reattori chimici).

Always ask suppliers for:

• Certificazione dei materiali (PER ESEMPIO., Mill Test Report) to verify carbon, cromo, e livelli di molibdeno.
• Conformance Testing results (PER ESEMPIO., GB/T 4334.5 for intergranular corrosion).
• Technical Data Sheets (TDS) with details on heat treatment and welding guidelines.

Controllo di qualità è critico: A Fujian supplier once sold fakeGB 00Cr17Ni14Mo2 with low molybdenum—parts failed in seawater within 6 mesi. Always confirm compliance before purchasing.

7. Confronto: GB 00Cr17Ni14Mo2 vs. Altri materiali

Come faGB 00Cr17Ni14Mo2 stack up against common stainless steels and alloys? Confrontiamo:

Per esempio: If you’re building a seawater cooling system, GB 00Cr17Ni14Mo2 is a better value than titanium (costi 75% meno) and more corrosion-resistant than GB 0Cr18Ni9. For a home kitchen, Anche se, GB 0Cr18Ni9 is cheaper and sufficient.

La prospettiva della tecnologia Yigu

Alla tecnologia Yigu, Abbiamo fornitoGB 00Cr17Ni14Mo2 to chemical, marino, and pharmaceutical clients for 12 anni. Its biggest advantage is balance: it offers the corrosion resistance of high-end alloys at a mid-range price, and its ultra-low carbon content eliminates post-weld headaches. Our data shows it cuts equipment replacement costs by 40% vs. GB 0Cr18Ni9 in salty/acidic environments. We also provide custom machining to ensure parts fit perfectly—critical for tight-tolerance applications like pharmaceutical tanks.

FAQ

1. Can GB 00Cr17Ni14Mo2 be used in sulfuric acid?
   Yes—it resists dilute to moderate concentrations (fino a 50%) of sulfuric acid at room temperature. For highly concentrated acid (Sopra 90%) o alte temperature, test first or use a nickel alloy.
2. Is GB 00Cr17Ni14Mo2 the same as SUS316L?
   Yes—they have nearly identical alloy composition (ultra-low carbon, high molybdenum) and performance. GB 00Cr17Ni14Mo2 is the Chinese standard designation, while SUS316L is the Japanese/American equivalent.
3. Do I need to coat GB 00Cr17Ni14Mo2 for marine use?
   No—its high molybdenum content provides enough Resistenza alla corrosione for most marine environments (PER ESEMPIO., scafi di navi, seawater pipes). Coating is unnecessary and may trap moisture, causing crevice corrosion.