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Monel 400 Round Bar: Top-Quality from China Manufacturer
Monel 400 Round Bar is a nickel-copper alloy renowned for its exceptional corrosion resistance and strength. With a blend of ~67% nickel and ~23% copper, this Monel 400 bar excels in harsh environments like seawater and acidic conditions, making it a staple in marine, chemical, and oil/gas industries. Its versatility and durability set it apart.
Price: Contact Us for a Custom Quote
Looking for competitive pricing on Monel 400 Round Bar? Contact us at sales for a custom quote tailored to your specifications. Our Monel 400 bar stock offers excellent value, balancing cost with top-tier performance.
Specifications of Monel 400 Round Bar
Our Monel Round Bar comes in various configurations:
- Standards: ASTM B164, ASME SB164, UNS N04400
- Diameter: 3 mm – 500 mm
- Length: Up to 6 meters (customizable)
- Surface Finish: Hot-rolled, cold-drawn, polished, or black
- Thickness Tolerance: ±0.1 mm
Key Features (Advantages)
- Superior corrosion resistance in seawater and acids
- High strength and toughness, even at sub-zero temps
- Excellent weldability and machinability
- Non-magnetic with good thermal conductivity
- Long-lasting in extreme conditions
Applications
The Monel 400 Bar serves a wide range of industries:
- Marine: Seawater pumps, propeller shafts
- Chemical: Acid processing equipment, valves
- Oil & Gas: Sour gas well components
- Aerospace: Heat-resistant fittings
- Power: Turbine parts
Chemical Composition of Monel 400
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 63.0 - 70.0 |
| Copper (Cu) | 28.0 - 34.0 |
| Iron (Fe) | ≤ 2.5 |
| Manganese (Mn) | ≤ 2.0 |
| Carbon (C) | ≤ 0.3 |
| Silicon (Si) | ≤ 0.5 |
| Sulfur (S) | ≤ 0.024 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 480 - 600 MPa |
| Yield Strength | 172 - 345 MPa |
| Elongation | ≥ 35% |
| Hardness (HB) | 110 - 150 |
Chemical Properties
Monel 400 Bar resists hydrochloric and hydrofluoric acids when de-aerated, excelling in reducing conditions. It withstands alkalis and salts but falters in oxidizing environments like nitric acid or ammonia systems.
Things to Note (Limitations)
- Weakens above 538°C (1000°F)
- Susceptible to nitric acid corrosion
- Work hardens quickly, requiring careful machining
- Higher cost than stainless steel
Corrosion Data
| Environment | Corrosion Rate (mm/year) | Test Conditions | Factors Affecting Corrosion |
|---|---|---|---|
| Atmospheric (Air) | 0.002 – 0.01 | Ambient, 20-25°C, 50% humidity | Humidity, sulfur presence |
| Seawater (Flowing) | < 0.05 | 25°C, aerated, high velocity | Velocity, biofouling |
| Seawater (Stagnant) | 0.1 – 0.3 | 25°C, stagnant, under deposits | Stagnation, crevice conditions |
| Sulfuric Acid (10%) | 0.1 – 0.2 | 25°C, de-aerated | Aeration, temperature |
| Hydrochloric Acid (10%) | 0.1 – 0.25 | 25°C, de-aerated | Concentration, aeration |
| Hydrofluoric Acid (50%) | 0.05 – 0.15 | 25°C, unaerated, up to boiling | Aeration, temperature |
| Nitric Acid (10%) | 0.5 – 1.0 | 25°C, oxidizing environment | Concentration, oxidizing agents |
| Caustic Soda (50%) | 0.02 – 0.05 | 100°C, de-aerated | Temperature, concentration |
Welding and Manufacturing Tips
- Welding: TIG/MIG with ERNiCu-7 filler; clean thoroughly post-weld to avoid embrittlement.
- Forming: Hot-work at 648-1176°C; cold-work for hardening.
- Machining: Use sharp tools, low speeds—Monel 400 Round Bar work-hardens fast.
Customer Reviews
Frequently Asked Questions
Q: How does Monel 400 compare to stainless steel?
A: Monel 400 outshines stainless steel in corrosion resistance, especially in seawater and acids, and holds strength at sub-zero temps—ideal where stainless falters.
Q: What’s the best application for Monel 400 Bar?
A: Marine and chemical settings—think seawater pumps or acid valves. Our factory in China supplies Monel 400 bar tailored for these harsh environments.
Q: Is Monel 400 better than titanium?
A: Monel 400  excels in acid resistance and ductility (≥ 35% elongation) over titanium’s higher strength but lower formability—perfect for corrosive, not weight-critical, uses.
Q: Can Monel Round Bar withstand high temperatures?
A: Yes, up to 538°C—beyond that, Monel 400 bar stock loses strength, so it’s best for moderate heat applications.
Q: How weldable is Monel 400 Bar Stock?
A: Very weldable! TIG with ERNiCu-7 filler keeps your Monel 400 Bar strong and corrosion-resistant—clean post-weld for best results.