Monel® Alloy Round Bar (Monel 400, Monel K-500)
✓ Seawater Immunity: Resists pitting and crevice corrosion in 3.5% NaCl seawater with **<0.02mm/year corrosion rate** (Monel 400).
✓ Acid Resistance: Withstands 20% H₂SO₄ and 15% HF at 80°C (176°F) without degradation.
✓ High-Strength Performance: Monel K-500 achieves 1,100 MPa tensile strength via age-hardening – 2x stronger than Monel 400.
✓ Precision Machinability: Cold-drawn/hot-rolled bars with **±0.05mm diameter tolerance** and Ra ≤1.6μm surface finish for CNC turning, milling, and grinding.
Monel® Alloy Round Bar (Monel 400, Monel K-500)
Engineered for industries demanding exceptional resistance to seawater, acids, and high-stress environments, Monel® alloy round bars combine nickel-copper matrices (Monel 400: Ni-67%, Cu-30%) to deliver unmatched durability and reliability. Certified to ASTM B164, ASME SB164, and NACE MR0175, these bars outperform stainless steel with 5x longer lifespan in saltwater, sulfuric acid, and hydrofluoric acid (HF) environments, making them ideal for marine, chemical, and oil & gas applications.
- Diameter: 5mm–300mm (cold-drawn/hot-rolled)
- Length: 1m–6m (standard) / custom-cut to 12m
- Surface Finishes: Hot Rolled, Cold Drawn, Polished (Ra ≤0.8μm)
- Mechanical Properties (Monel 400): Yield Strength ≥240 MPa | Tensile Strength ≥550 MPa | Elongation ≥35% | Hardness ≤150 HB
| Parameter Category | Monel 400 | Monel K-500 |
|---|---|---|
| Material Standard | ASTM B164, UNS N04400 | ASTM B865, UNS N05500 |
| Chemical Composition (%) | Ni: 63–70, Cu: 28–34, Fe: ≤2.5, Mn: ≤2.0, Si: ≤0.5, C: ≤0.3, S: ≤0.024 | Ni: 63–70, Cu: 27–33, Al: 2.3–3.15, Ti: 0.35–0.85, Fe: ≤2.0, Mn: ≤1.5, Si: ≤0.5, C: ≤0.25 |
| Tensile Strength (MPa) | 480–620 (Annealed) | 1000–1170 (Aged) |
| Yield Strength (MPa) | ≥170 (Annealed) | ≥690 (Aged) |
| Elongation (%) | ≥35 (in 50mm gauge length) | ≥20 (in 50mm gauge length) |
| Hardness | Rockwell B65–85 | Rockwell C25–35 |
| Density (g/cm³) | 8.80 | 8.44 |
| Melting Range (°C) | 1300–1350 | 1315–1350 |
| Thermal Conductivity (W/m·K) | 21.8 (at 20°C) | 26.0 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 14.4 (20–300°C) | 13.9 (20–300°C) |
| Electrical Resistivity (Ω·m) | 0.48 × 10⁻⁶ | 0.51 × 10⁻⁶ |
| Corrosion Resistance | Excellent resistance to seawater, hydrofluoric acid, alkalis, and saltwater pitting. | Similar to Monel 400, with enhanced resistance to stress corrosion cracking. |
| Heat Treatment | Annealing: 870–980°C (air cooling). | Solution Treatment: 980–1040°C (water quench) + Aging: 480–620°C for 16h. |
| Surface Finishes | Hot Rolled, Cold Drawn, Peeled, Polished (Ra ≤0.8μm). | Hot Rolled, Solution Treated, Aged, Polished. |
| Diameter Range (mm) | 5–300 | 5–250 |
| Length (m) | 3–6 (standard), Custom up to 12. | 3–6 (standard) |
| Key Applications | Marine shafts, valves, fasteners, heat exchanger components. | High-strength pump shafts, oil drilling tools, aerospace fasteners, marine propeller shafts. |
Monel® Alloy Round Bar (Monel 400, Monel K-500) Applications
| Industry | Critical Use Cases | Monel® Round Bar Advantage |
|---|---|---|
| Marine Engineering | Propeller shafts, seawater pump valves | Zero pitting in saltwater for 20+ years. |
| Chemical Processing | HF acid reactor agitators, sulfuric acid pumps | Resists 15% HF at 50°C (122°F). |
| Oil & Gas | Subsea valve components, sour gas wellheads | K-500 withstands H₂S >5,000 ppm at 150°C (302°F). |
| Power Generation | Heat exchanger tubes, boiler feedwater systems | Immunity to steam erosion at 400°C (752°F). |
Monel® Alloy Round Bar (Monel 400, Monel K-500) Product Packaging
Our Monel® Alloy Round Bar (Monel 400, Monel K-500) (UNS N04400/N05500, ASTM B164/ASME SB-164 compliant) are engineered for exceptional performance in seawater, sulfuric acid, and high-temperature hydrocarbon environments. To ensure pristine surface quality and dimensional precision during global transit, we implement marine-certified packaging systems and intelligent logistics protocols adhering to NACE MR0175, DNVGL-RP-0419, and IMO MSC.245(83) standards.
Small Bars (<50mm)
Bundled with steel straps + VCI-coated wraps, crated on reinforced wooden pallets.
Large Bars (≥50mm)
End caps + edge protectors, stacked in custom steel racks with desiccant units.
Anti-Scratch Sleeving
Silicone-impregnated fabric for polished/ground surfaces.
RFID Tags
Embedded tracking chips with real-time material certification access.
Monel® Alloy Round Bar (Monel 400, Monel K-500) Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
Why Choose Us?
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specifications and customization
Unlimited size, support non-standard cutting. Multiple surface treatments.
Professional capabilities
25 Years Of Focus On Metal Materials Science
Certification & Quality Assurance
Products comply with international standards such as ASTM, EN, JIS, etc., and are 100% tested from raw materials to finished products
Fast delivery & global supply
Global urgent orders are delivered within 15 days. One-stop service
FAQ
Q1: How does Monel 400 differ from Monel K-500?
A: Monel 400 prioritizes corrosion resistance and formability, while K-500 (age-hardened) offers 1,100 MPa tensile strength for structural applications.
Q2: What machining parameters prevent work hardening?
A: Use carbide tools with cutting speeds ≤90 m/min and coolant flow ≥8 L/min for Monel 400/K-500.
Q3: Are bars certified for offshore oil platforms?
Full compliance includes:
- NACE MR0175/ISO 15156
- ASME SB164
- DNV-OS-F101 Subsea Standards
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1 ton MOQ.
Custom sizes/tempers: 5 tons MOQ (lead time 35 days).
Q5: How to validate material authenticity?
Scan QR codes with MonelGuard™ app to access:
- XRF validation against PMI certificates
- Third-party SGS/BV test reports
- Blockchain-validated ASTM B164 mill certs
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