DRILLSTAR CARBIDE TOOLS ARE WORKING IN MANY PLACES AROUND THE WORLD
Manufactured through controlled hot and cold working processes, these alloys offer superior ductility and formability compared to cast corrosion-resistant alloys, making them ideal for components that require bending, stamping, or deep drawing. Their applications span industries where material degradation from corrosion could lead to safety hazards or costly downtime, such as offshore oil and gas, chemical processing, and marine engineering. By combining robust corrosion resistance with workable mechanical properties, Corrosion Resistant Deformation Alloys provide a reliable solution for harsh environment applications.
Pitting Resistance Equivalent (PRE) ≥40: High chromium (18–28%), molybdenum (3–10%), and nitrogen (0.1–0.3%) content for superior resistance to localized corrosion in chloride-rich media.
SCC Resistance: Low carbon (≤0.03%) and optimized grain structure prevent crack propagation in tensile stress environments, critical for welded structures.
High Strength & Ductility: Duplex alloys offer yield strengths up to 650 MPa with 25% elongation, enabling thin-wall designs without compromising integrity.
Temperature Range: Serviceable from -196°C (cryogenic) to 600°C, maintaining toughness and corrosion resistance across wide thermal gradients.
Hot working at 1,000–1,200°C allows complex shaping, while cold rolling achieves precise thicknesses (0.5–50mm) for sheet and plate products.
Weldable using GTAW, GMAW, and SMAW processes with matching filler metals, ensuring seamless integration into fabrication workflows.
Pickled, polished, or passivated surfaces to meet industry standards (e.g., NACE MR0175 for oil and gas) and enhance corrosion resistance further.
Offshore Oil & Gas: Pipeline components, subsea valves, and riser systems exposed to seawater and H2S-containing fluids, where SCC and microbiologically influenced corrosion (MIC) are major risks.
Chemical Processing: Heat exchangers, reactor vessels, and piping in sulfuric acid, hydrochloric acid, or chloride solutions, requiring resistance to both general and localized corrosion.
Marine Engineering: Ship hulls, propeller shafts, and seawater cooling systems, leveraging copper-nickel alloys' biofouling resistance and duplex steels' high-strength-to-weight ratio.
Pharmaceutical & Food Industry: Stainless steel alloys for process equipment in corrosive cleaning agents (e.g., citric acid, caustic soda), ensuring product purity and equipment longevity.
Q: How does duplex stainless steel differ from austenitic grades in corrosion resistance?
A: Duplex alloys have a balanced ferrite-austenite microstructure, offering higher PRE values and better resistance to chloride-induced SCC than austenitic grades like 316L, while maintaining similar formability.
Q: Can these alloys be used in high-velocity seawater applications?
A: Yes, nickel-based alloys like Hastelloy® C-276 and copper-nickel alloys are rated for seawater velocities up to 8 m/s, with minimal erosion-corrosion damage.
Q: What testing is performed to validate corrosion resistance?
A: Standard tests include ASTM G48 (pitting/crevice), ASTM G35 (sulfuric acid resistance), and NACE TM0177 (SCC in H2S). Custom tests for specific environments are available upon request.
Q: Do these alloys require special storage precautions?
A: Store in dry, non-corrosive environments away from moisture and chloride-contaminated materials. Protective coatings (e.g., epoxy primer) are recommended for long-term outdoor storage.
Variety | Classification | Specification |
steel ingot | master alloy | Φ70～Φ320 |
Electroslag remelting ingots, consumable remelting ingots | Φ70～Φ600 | |
Forged materials | round lumber | Φ12～Φ350 |
Rectangular material | 30×30～350×350 | |
Hot rolled products | Cake, sleeve, flange, ring | According to order agreement |
round lumber | Φ8.0～Φ80 | |
flat material | 4×60～50×300 | |
Cold drawn (polished)） | Great | Φ2～Φ60 |
wire material | Round silk | Φ0.04～Φ8 |
Special-shaped silk | agreement |
Manufactured through controlled hot and cold working processes, these alloys offer superior ductility and formability compared to cast corrosion-resistant alloys, making them ideal for components that require bending, stamping, or deep drawing. Their applications span industries where material degradation from corrosion could lead to safety hazards or costly downtime, such as offshore oil and gas, chemical processing, and marine engineering. By combining robust corrosion resistance with workable mechanical properties, Corrosion Resistant Deformation Alloys provide a reliable solution for harsh environment applications.
Pitting Resistance Equivalent (PRE) ≥40: High chromium (18–28%), molybdenum (3–10%), and nitrogen (0.1–0.3%) content for superior resistance to localized corrosion in chloride-rich media.
SCC Resistance: Low carbon (≤0.03%) and optimized grain structure prevent crack propagation in tensile stress environments, critical for welded structures.
High Strength & Ductility: Duplex alloys offer yield strengths up to 650 MPa with 25% elongation, enabling thin-wall designs without compromising integrity.
Temperature Range: Serviceable from -196°C (cryogenic) to 600°C, maintaining toughness and corrosion resistance across wide thermal gradients.
Hot working at 1,000–1,200°C allows complex shaping, while cold rolling achieves precise thicknesses (0.5–50mm) for sheet and plate products.
Weldable using GTAW, GMAW, and SMAW processes with matching filler metals, ensuring seamless integration into fabrication workflows.
Pickled, polished, or passivated surfaces to meet industry standards (e.g., NACE MR0175 for oil and gas) and enhance corrosion resistance further.
Offshore Oil & Gas: Pipeline components, subsea valves, and riser systems exposed to seawater and H2S-containing fluids, where SCC and microbiologically influenced corrosion (MIC) are major risks.
Chemical Processing: Heat exchangers, reactor vessels, and piping in sulfuric acid, hydrochloric acid, or chloride solutions, requiring resistance to both general and localized corrosion.
Marine Engineering: Ship hulls, propeller shafts, and seawater cooling systems, leveraging copper-nickel alloys' biofouling resistance and duplex steels' high-strength-to-weight ratio.
Pharmaceutical & Food Industry: Stainless steel alloys for process equipment in corrosive cleaning agents (e.g., citric acid, caustic soda), ensuring product purity and equipment longevity.
Q: How does duplex stainless steel differ from austenitic grades in corrosion resistance?
A: Duplex alloys have a balanced ferrite-austenite microstructure, offering higher PRE values and better resistance to chloride-induced SCC than austenitic grades like 316L, while maintaining similar formability.
Q: Can these alloys be used in high-velocity seawater applications?
A: Yes, nickel-based alloys like Hastelloy® C-276 and copper-nickel alloys are rated for seawater velocities up to 8 m/s, with minimal erosion-corrosion damage.
Q: What testing is performed to validate corrosion resistance?
A: Standard tests include ASTM G48 (pitting/crevice), ASTM G35 (sulfuric acid resistance), and NACE TM0177 (SCC in H2S). Custom tests for specific environments are available upon request.
Q: Do these alloys require special storage precautions?
A: Store in dry, non-corrosive environments away from moisture and chloride-contaminated materials. Protective coatings (e.g., epoxy primer) are recommended for long-term outdoor storage.
Variety | Classification | Specification |
steel ingot | master alloy | Φ70～Φ320 |
Electroslag remelting ingots, consumable remelting ingots | Φ70～Φ600 | |
Forged materials | round lumber | Φ12～Φ350 |
Rectangular material | 30×30～350×350 | |
Hot rolled products | Cake, sleeve, flange, ring | According to order agreement |
round lumber | Φ8.0～Φ80 | |
flat material | 4×60～50×300 | |
Cold drawn (polished)） | Great | Φ2～Φ60 |
wire material | Round silk | Φ0.04～Φ8 |
Special-shaped silk | agreement |
