ASTM B574 covers rod of low-carbon nickel-chromium-molybdenum-copper alloy (UNS N06200) for general corrosive service. Alloy C-2000 is an improved version of Alloy C-22, offering enhanced resistance to both reducing and oxidizing environments through strategic copper addition. This Ni-Cr-Mo alloy is ductile, easy to weld, and highly resistant to pitting, crevice attack, and stress corrosion cracking, making it one of the most versatile materials for chemical processing equipment.
1. Product Specifications & Physical DataUNS N06200 is available in hot or cold finished, solution annealed rod form for chemical processing components requiring verified corrosion resistance and mechanical properties. Available Forms: Rod, bar, wire, and custom components . Specifications: ASTM B574, ASME SB-574, UNS N06200, Werkstoff Nr. 2.4675 .
| Chemical Composition (Weight %) | UNS N06200 Specification |
|---|
| Nickel (Ni) | Balance | | Chromium (Cr) | 22.0 - 24.0 | | Molybdenum (Mo) | 15.0 - 17.0 | | Copper (Cu) | 1.3 - 1.9 | | Iron (Fe) | 3.0 max. | | Cobalt (Co) | 2.0 max. | | Carbon (C) | 0.010 max. | | Manganese (Mn) | 0.50 max. | | Silicon (Si) | 0.08 max. | | Tungsten (W) | 0.50 max. | | Aluminum (Al) | 0.50 max. | | Vanadium (V) | 0.20 max. |
| Physical Properties | Metric | Imperial |
|---|
| Density | 8.50 g/cm³ | 0.307 lb/in³ | | Melting Range | 1332 - 1400°C | 2430 - 2552°F | | Modulus of Elasticity (RT) | 205 GPa | 29.7 × 10⁶ psi | | Electrical Resistivity | 1.25 µΩ·m | 1.25 µΩ·m |
| Mechanical Properties (Solution Annealed Rod) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 690 MPa | 100 ksi | | Yield Strength (0.2% offset, min.) | 310 MPa | 45 ksi | | Elongation (min.) | 40% | 40% | | Hardness (Rockwell B) | 90 - 100 | 90 - 100 |
2. Operating Conditions & Selection CriteriaService Temperature: Suitable for applications from cryogenic to 400°C (752°F) in corrosive service; oxidation resistance to 1000°C (1832°F) for short-term exposure . Copper Addition: 1.3-1.9% copper enhances resistance to reducing acids (sulfuric, hydrochloric, hydrofluoric) beyond C-22 capabilities . Chromium Content: 22-24% chromium provides excellent resistance to oxidizing media (ferric chloride, nitric acid, wet chlorine) . Low Carbon: 0.010% maximum carbon eliminates carbide precipitation, ensuring superior as-welded corrosion resistance . Corrosion Resistance: Outstanding resistance to pitting, crevice attack, and stress corrosion cracking in chloride-containing environments . Versatility: One of the most versatile nickel alloys, suitable for both reducing and oxidizing process streams .
3. Fabrication & Material ComparisonSolution Annealing: 1121-1177°C (2050-2150°F), water quench; supplied in this condition for optimal corrosion resistance . Hot Finishing: Hot worked at elevated temperatures followed by solution annealing . Cold Finishing: Cold drawn or rolled to achieve desired dimensions and surface finish . Machining: Good machinability with sharp tools, positive feeds, and adequate coolant; work-hardening rate moderate . Welding: Excellent weldability using GTAW, GMAW, and resistance welding; matching filler metal recommended; no post-weld heat treatment required .
| Material Comparison | Alloy C-2000 | Alloy C-276 | Alloy C-22 | Alloy B-2 |
|---|
| Chromium Content | 22-24% | 14.5-16.5% | 20-22% | 1.0% max. | | Molybdenum Content | 15-17% | 15-17% | 12.5-14.5% | 26-30% | | Copper Addition | 1.3-1.9% | — | — | — | | Reducing Acid Resistance | Excellent | Good | Good | Excellent | | Oxidizing Acid Resistance | Excellent | Good | Excellent | Poor | | Pitting Resistance | Outstanding | Excellent | Excellent | Moderate | | As-Welded Corrosion | Excellent | Excellent | Excellent | Good | | Primary Use | Mixed environments | Universal | Universal | Reducing only |
4. ApplicationsChemical Processing: Reactors, vessels, columns for mixed acid environments Heat Exchangers: Shell and tube exchangers handling both reducing and oxidizing streams Pumps & Valves: Components for corrosive fluid handling requiring versatility Piping Systems: Pipe work and fittings for chemical plants with variable process conditions Pollution Control: FGD scrubbers handling both reducing and oxidizing zones Pharmaceutical: Processing equipment requiring high purity and corrosion resistance Petrochemical: Components in refineries with variable feedstocks
Contact ZYTC Alloy for certified ASTM B574 UNS N06200 (Alloy C-2000) rod and bar with complete traceability, certificates, and competitive pricing. Available in hot or cold finished, solution annealed condition for chemical processing and corrosive service applications. Email:daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
