Table of Contents
- Monel 400 Square & Hex Bars Overview
- Technical Specifications
- Chemical Composition & Mechanical Properties
- Types of Monel 400 Bars: Hexagonal & Square Profiles
- Key Advantages of Monel 400 Square & Hex Bars
- Key Applications of Monel 400 Square & Hex Bars
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Monel 400 Square & Hex Bars Overview
Monel 400 Bars are provided by Aurum Overseas, a leading global supplier and exporter. Our UNS N04400 Square Bars and UNS N04400 Hexagonal Bars consist of a single-phase solid-solution nickel-copper alloy that delivers exceptional toughness up to 538 °C. As a trusted Monel 400 Square Bars and Hex Bars Supplier, all our stock meets ASTM B164, BS 3076, and DIN 17752 standards.
We offer competitive pricing on Alloy 400 Bars and Monel 400 Bars without compromising material purity or tolerances. As a premier Monel 400 Square Bars and Hex Bars Exporter, our inventory includes cold-drawn bright hex stock and hot-rolled square sections optimized for high-speed CNC machining.
Engineered to resist seawater, hydrofluoric acid, and alkalis, our bars serve marine, offshore, and chemical applications. Contact Aurum Overseas today for instant quotes and mill test certificates.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM B164, ASME SB164, BS 3076 NA13, DIN 17752, QQ-N-281 |
| UNS Designation | UNS N04400 |
| Across-Flats (AF) Size Range | 6.0 mm to 120.0 mm (1/4" to 4-1/2" Square & Hexagon Profiles) |
| Length Options | 1,000 mm to 6,000 mm, Precision Sawing Cut-to-Length |
| Surface Finishes | Cold Drawn, Centerless Ground, Bright Annealed, Hot Rolled, Forged |
| Heat Treatment Condition | Solution Annealed (871 °C to 982 °C, Rapid Air or Water Quenched), Stress Relieved |
| Dimensional Tolerances | ASTM B164 / ISO 286-2 (h9, h10, h11 profile tolerances) |
| HSN Code | 75052200 |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Standard / Grade | Werkstoff Nr. | UNS Designation | EN / DIN |
|---|---|---|---|
| Monel 400 | 2.4360 | N04400 | NiCu30Fe |
Chemical Composition (%)
| Element | Specification Range (ASTM B164 UNS N04400) |
|---|---|
| Nickel (Ni) | 63.0 min |
| Copper (Cu) | 28.0 – 34.0 |
| Iron (Fe) | 2.5 max |
| Manganese (Mn) | 2.0 max |
| Carbon (C) | 0.3 max |
| Silicon (Si) | 0.5 max |
| Sulfur (S) | 0.024 max |
Mechanical & Physical Properties
| Property Parameter | Metric Units | Imperial Units |
|---|---|---|
| Density | 8.80 g/cm³ | 0.318 lb/in³ |
| Melting Point | 1300 – 1350 °C | 2370 – 2460 °F |
| Tensile Strength (Min) | 550 MPa | 80,000 Psi (80 ksi) |
| Yield Strength (0.2% Offset, Min) | 240 MPa | 35,000 Psi (35 ksi) |
| Elongation (Min) | 40 % | 40 % |
| Hardness (Rockwell B) | 75 – 85 HRB | 75 – 85 HRB |
Types of Monel 400 Bars: Hexagonal & Square Profiles
Aurum Overseas supplies Monel 400 (UNS N04400) bars in precision hexagonal and square profiles for marine and hydrofluoric acid resistance applications.
ASTM B164 UNS N04400 Hex Bars
ASTM B164 UNS N04400 Square Bars
Key Advantages of Monel 400 Square & Hex Bars
Immunity to Rapidly Flowing Seawater
Solid-solution nickel-copper structure resists impingement attack, cavitation, and biofouling in high-velocity marine environments.
Hydrofluoric Acid Defense
Exceptional resistance to all concentrations of hydrofluoric acid up to boiling temperatures in non-aerated conditions.
Chloride Stress Cracking Resistance
Complete immunity to chloride-induced stress corrosion cracking in brackish water, estuarine environments, and marine splash zones.
Cryogenic Toughness Maintenance
Excellent impact strength and ductility at sub-zero temperatures with no ductile-to-brittle transition point.
Key Applications of Monel 400 Square & Hex Bars
| Industry | Applications | Operational Benefit |
|---|---|---|
| Marine Engineering | Propeller shafts, pump impellers, hex fastener hardware | Eliminates velocity erosion and biofouling degradation in raw seawater intake systems. |
| Chemical Processing | Hydrofluoric acid alkylation valves, hex drain plugs | Resists aggressive HF acid exposure without catastrophic stress cracking or wall thinning. |
| Oil & Gas Extraction | Subsea valve stems, wellhead square supports, tie rods | Retains high mechanical strength and corrosion resistance in sour gas (H2S) splash zones. |
| Desalination Plants | High-pressure feed pump shafts, brine heater hex bolts | Prevents severe crevice corrosion and pitting in hot concentrated salt brine streams. |
Quality Testing & Inspection
As a certified Monel 400 Square Bars Exporter and Monel 400 Hex Bars Exporter, Aurum Overseas enforces rigorous testing protocols on every lot:
- Positive Material Identification (PMI): 100% XRF chemical analysis verifying 63.0% min Ni and 28.0–34.0% Cu composition.
- Mechanical & Hardness Testing: Tensile, yield, elongation, and Rockwell hardness verification strictly per ASTM B164 specifications.
- Hydrostatic & Non-Destructive Testing: 100% ultrasonic volumetric inspection per ASTM A388 to ensure zero internal inclusions, pipe, or center bursts.
Global Export Markets
As an established Monel 400 Square & Hex Bar Exporter, Aurum Overseas supplies fully certified ASTM B164 UNS N04400 bars to global marine, chemical processing, oil & gas, and desalination facilities:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Monel 400 is a nickel-copper alloy with zero iron base, making it immune to chloride stress corrosion cracking and pitting in stagnant or rapidly flowing seawater where 300-series stainless steels fail.
Yes. Monel 400 possesses excellent weldability using matching ERNiCu-7 filler metal and maintains full ductility and corrosion resistance in as-welded heat-affected zones without PWHT.
Cold drawing significantly increases yield strength and hardness while maintaining sufficient elongation (40% min), providing tighter h9 dimensional tolerances for precision CNC turning.
Monel 400 performs reliably in air up to 538 °C (1000 °F). Above this threshold, sulfur-bearing gases or reducing conditions can cause grain boundary embrittlement.
All shipments from Aurum Overseas include official EN 10204 3.1 Mill Test Certificates detailing heat chemistry, mechanical properties, hardness values, and NDT clearance.
Contact Aurum Overseas
Partner with a trusted Monel 400 Square Bars Supplier and Monel 400 Hex Bars Supplier for certified high-performance alloy stock, custom sawing, and rapid international shipment.