Products Features
Excellent Machinability
By adding sulfur (0.025-0.060%), the machinability of Monel R-405 is significantly better than that of Monel 400. It offers good chip-breaking performance and is suitable for high-speed automatic lathes and precision machining, which significantly improves production efficiency and reduces tool wear and machining costs.
Superior Resistance to Seawater and Corrosion
It exhibits extremely low corrosion rates in both flowing and stagnant seawater, with outstanding resistance to chloride stress corrosion cracking (SCC). It also performs stably in non-oxidizing acids (such as sulfuric acid, hydrochloric acid, hydrofluoric acid) and alkaline solutions, making it suitable for marine engineering, chemical equipment, and acid treatment systems.
Good High-Temperature Performance and Low-Temperature Toughness
It maintains good mechanical properties below 400°C and still exhibits excellent toughness and corrosion resistance at -200°C low temperatures. The recommended long-term operating temperature is ≤400°C, making it suitable for pressure-bearing components and fasteners in medium-to-low temperature conditions.
Good Weldability and Formability
It can be hot- and cold-worked using conventional methods. It has good weldability (suitable for TIG, MIG, and resistance welding) and no post-weld heat treatment is required. In the annealed condition, it has good plasticity and is easy to manufacture complex-shaped parts.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni (containing Co) |
63.0 - 70.0% |
Matrix elements that provide corrosion resistance and high-temperature stability |
|
Cu |
Remaining quantity (27 - 34%) |
Enhance resistance to seawater and reducing acid corrosion |
|
Fe |
≤ 2.5% |
Strictly control to ensure purity and corrosion resistance |
|
Mn |
≤ 2.0% |
Deoxidizer, improve hot working properties |
|
Si |
≤ 0.5% |
Deoxidizer |
|
C |
≤ 0.30% |
Control carbon content to balance strength and workability |
|
S |
0.025 - 0.060% |
Controllable sulfur addition significantly improves machinability (as distinct from Monel 400) |
|
Co |
≤ 2.0% |
Control impurities |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.80 - 8.91 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1300 - 1350°C |
- |
|
Coefficient of Thermal Expansion (20-100°C) |
13.9 × 10⁻⁶ /K |
- |
|
Elastic modulus (Young's modulus) |
179 GPa |
Room temperature |
|
Thermal Conductivity (20°C) |
21.8 W/(m·K) |
Room temperature |
|
Resistivity (20°C) |
0.51 µΩ·m |
Room temperature |
|
Magnetism |
Weak magnetism |
It has weak magnetism in the annealed state |
Mechanical Properties (Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 480 MPa |
ASTM B164 |
|
Yield Strength (0.2% Offset) |
≥ 170 MPa |
ASTM B164 |
|
Elongation |
≥ 35% |
ASTM B164 |
|
Hardness |
≤ 85 HRB |
- |
High-temperature performance
Antioxidant Properties: Monel R-405 exhibits good oxidation resistance below 400°C, forming a stable oxide film on its surface, making it suitable for long-term service in medium to high-temperature conditions. Prolonged use at higher temperatures can lead to reduced strength and accelerated oxidation; it is recommended for use below 500°C.
High-Temperature Mechanical Properties: At 400°C, the tensile strength remains above approximately 400 MPa, but the yield strength gradually decreases with increasing temperature.
Applicable Media:
1. Seawater, saltwater, brines (excellent resistance to chloride stress corrosion cracking)
2. Non-oxidizing acids: Sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid
3. Alkaline solutions: Sodium hydroxide, potassium hydroxide
4. Organic acids: Formic acid, acetic acid
5. High-temperature steam, dry chlorine gas, bromine, fluorine, and organic compounds
6. Neutral solutions, water, atmosphere
Note: Monel R-405 is not resistant to strong oxidizing acids (such as nitric acid, concentrated hot sulfuric acid) or wet chlorine gas, with a higher corrosion rate in strongly oxidizing environments.
Monel R-405 is designed for applications requiring both precision machining and high corrosion resistance, and is recommended for the following fields:
Application Fields
-
Precision Machined Parts: Mass-produced components from automatic machine tools, valve stems, instrument accessories, and fasteners. The addition of sulfur significantly improves machinability, resulting in high production efficiency, making it suitable for mass production.
-
Marine Engineering: Pump shafts, valve components, fasteners, and marine instruments. It exhibits excellent resistance to seawater corrosion and biological fouling.
-
Oil and Gas: Valve internals, instrument components, and fasteners in systems handling acidic gases and acidic water. It effectively prevents sulfide stress corrosion cracking (SSCC).
-
Chemical and Petrochemical: Pump and valve fasteners, reactor internals, and evaporators. It demonstrates good corrosion resistance in non-oxidizing acid media such as sulfuric acid, hydrochloric acid, and hydrofluoric acid.
-
Instrumentation: Precision instrument components and sensor elements, utilizing its good dimensional stability and corrosion resistance.
-
Aerospace: Non-critical structural parts and fasteners, as well as components requiring good machinability.
-
Food Processing Equipment: Corrosion-resistant and easily machined parts that meet hygiene requirements.
-
Pharmaceutical Industry: Precise, corrosion-resistant, and easily cleanable components.
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Monel R-405 materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Seamless Pipe
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Special thick/thin rolling, ultra-wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars, and various heat treatment conditions |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Special surface treatment, precision drawing |
Why Choose Us? - Reliable engineering technology. Dependable delivery.
We are not just a supplier, but a trusted materials partner for you in China.
Vertically Integrated Production
Own 20,000㎡ facility with 10+ automated lines (8,000+ tons/year). In-house tooling & die center enables rapid customization and effective cost control - no middleman markup.
Strict Quality Control at Every Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment.
Reliable Delivery & Export Packaging
10+ years exporting to Europe, North America, Southeast Asia & Middle East with waterproof and anti-rust protection, combined with flexible shipping options ensures safe and on-time arrival.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of Monel R-405?
Q: What heat treatment is required for Monel R-405?
Q: What is the maximum service temperature?
Q: What is the difference between Monel R-405 and Monel 400?
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