Monel 400 Forged Discs Ni-Cu Corrosion Resistance And Strength Alloy
ⅠMaterial Nature: The “Genetic Code” of Ni-Cu Alloy
| Dimensions | Core Information |
| Composition Definition | Alloy type | Nickel-based corrosion-resistant alloy |
| key composition | Mainly: Ni(63~67%)+ Cu(28~34%) |
| A small amount: Fe, Mn, C (impurities ≤ 2%) |
| Elemental Mission | Ni:Constructs a passivation film to resist corrosion from hydrochloric acid and alkali solution |
| Cu: Enhances pitting corrosion resistance in seawater |
| Low Fe/Mn: Avoid precipitation of brittle phase and improve processability |
| Morphological characteristics | Shape | Forged discs |
| Appearance | Silver-grey metallic luster, smooth surface without rust after machining |
ⅡManufacturing logic: The "performance leap" given by forging
1. The core of the hot forging process
①Temperature window: 900~1100°C (austenitic single-phase area, best plasticity), by upsetting/ring rolling, crushing the coarse grains in the casting state.
②Forge Value:
▶Eliminate casting defects such as looseness and porosity, resulting in density up to 99.9%+;
▶The grains are arranged "streamlined" along the stress direction, and the fatigue resistance is increased by 40~60% (compared to castings).
2. Post-processing and precision
①Machining: Milling flattened end face, finishing outer circle, ensuring dimensional tolerance ±0.1mm, surface roughness Ra≤1.6μm (meeting the requirements of sealing surface assembly).
②Optional solution treatment: 1000~1050°C insulation and then fast cooling to strengthen corrosion resistance (avoid precipitation of carbide at grain boundaries).
ⅢPerformance advantages: The "survival code" for extreme environments
1. Corrosion resistance – "corrosion insulator"
| Corrosive Media | Performance Highlights |
| Seawater (containing Cl⁻) | A Cu₂O passivation film is formed on the surface to resist pitting corrosion and stress corrosion |
| Its service life in marine environment is more than 10 times that of carbon steel. |
| Hydrochloric acid (dilute / medium concentration) | Better than 316L stainless steel |
| Lye | Resistant to concentrated alkali (≤70% concentration) corrosion, suitable for chlor-alkali industrial equipment. |
2. Mechanical properties - "strong and tough"
▶Static strength: Tensile strength ≥ 550MPa, yield strength ≥ 240MPa (after forging, cold working can be further increased to 700MPa+).
▶Dynamic performance: High fatigue limit (300MPa@10⁷ cycle), impact toughness (AKV≥100J), suitable for alternating load scenarios.
3. Physical characteristics
Density 8.8g/cm³ (10% heavier than carbon steel, more "pressing" in the same volume), non-magnetic (can be screened by magnet, different from most stainless steels), thermal conductivity 21.6W/(m・K) (better than Inconel alloy, more efficient heat dissipation).
ⅣApplication value: The "key puzzle" of high-end industry
1. Industry adaptation
| Field | Typical Parts | Core Needs Matching |
| Marine Engineering | Seawater valve flange, marine pump body head | Resistant to seawater erosion + chloride ion corrosion, long life and maintenance-free. |
| Chemical Metallurgy | Hydrochloric acid storage tank flange, chlor-alkali equipment valve disc | Resistant to hydrochloric acid and chlorine corrosion, resistant to temperature difference (-100~400℃) |
| Energy Nuclear Power | Condenser tube forging, nuclear grade pump casing | Resistant to intergranular corrosion, meets ASME standards for nuclear power |
2. Alternative logic
▶Compared with 316L stainless steel: Corrosion resistance is increased by 5~10 times, especially in hydrochloric acid and seawater environments;
▶Compared with pure nickel (Ni200): 30% lower cost (due to Cu content) while maintaining high corrosion resistance;
▶Compared with castings: 40%+ mechanical properties, suitable for high pressure and dynamic load conditions.
ⅤQuality endorsement: Standards and testing
①Executive standards: ASTM B165 (forging specification), ASME SB165 (nuclear power grade certification).
②Mandatory inspection items:
▶Spectral analysis (accurate determination of Ni and Cu content);
▶Ultrasonic flaw detection (UT, internal defect detection, grade ≥NB/T 47013);
▶Hardness test (HB160~200, annealed state; HB in cold processing up to 250+);
▶Grain size testing (clear forging streamline, grain size ≥ASTM Grade 5).
Summary: Monel 400 forging cake is an industrial core part with dual attributes of "corrosion resistance + strength", unlocking the performance potential through forging, accurately matching the extreme environment such as marine and chemical, from composition to application, every detail serves the ultimate mission of "anti-corrosion and long life".
DINGSCO
Hunan Dinghan New Material Technology Co., Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications.We are dedicated to providing our customers with best quality products, fastest possible deliveries, most competitive prices of Nickel Based Corrosion Resistant and High Temperature alloys in bars, rods, forged flanges, valve parts (Ball, Stem, Seat Ring, etc), forged shapes (shafts, discs, blocks, hubs, rings, cylinders and other custom shapes) according to ASTM, ASME, API, AMS, NACE and other industry standards.
PROFESSIONAL NICKEL ALLOY MANUFACTURER
- Monel, Incoloy, Inconel, Hastelloy
- VIM, ESR, Forging, Heat treatment, Machining
- Round Bar, Ball, Stem, Ring, Flange, etc
- ISO9001, API-6A, API-20B, PED, NORSOK
CORE VALUE
- QUALITY ASSURANCE
- SCIENCE AND TECHNOLOGY INNOVATION STRATEGY
- COOPERATION
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Monel 400 Forged Discs Ni-Cu Corrosion Resistance And Strength Alloy Images
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