Durable Monel 400 Round Steel Excellent Resistance to Acids & Saline Environments, Customizable Sizes, ASTM B164 Compliant

Product Introduction

Our durable Monel 400 round steel represents the pinnacle of corrosion-resistant nickel-copper alloy technology, specifically engineered to withstand the most aggressive acidic and saline environments. Manufactured in compliance with ASTM B164 standards, this premium round bar offers unparalleled performance where other materials fail. Monel 400 (UNS N04400) maintains its structural integrity in conditions that would rapidly degrade conventional stainless steels, making it the material of choice for critical applications across marine, chemical processing, oil and gas, and aerospace industries.

Exceptional Material Properties

Superior Corrosion Resistance
Monel 400 round steel demonstrates extraordinary resistance to corrosive attack in both oxidizing and reducing environments. The alloy exhibits exceptional performance in hydrofluoric acid, sulfuric acid, phosphoric acid, and alkaline solutions, with corrosion rates significantly lower than standard stainless steels. In saline environments, including full immersion in seawater, Monel 400 maintains a corrosion rate of less than 1 mil per year (0.025 mm/year), ensuring long-term reliability in marine applications.

Enhanced Mechanical Strength
This nickel-copper alloy provides excellent mechanical properties across a wide temperature range. With typical tensile strength of 70-85 ksi (480-585 MPa) and yield strength of 25-45 ksi (170-310 MPa) depending on temper condition, Monel 400 offers superior structural capability. The material maintains its strength and toughness at sub-zero temperatures down to -200°F (-129°C) and elevated temperatures up to 1000°F (538°C).

Physical Characteristics
Monel 400 possesses a density of 0.319 lb/in³ (8.83 g/cm³) and a melting range of 2370-2460°F (1300-1350°C). The alloy features a thermal conductivity of 15.5 BTU-in/hr-ft²-°F (22.4 W/m·K) and specific heat capacity of 0.092 BTU/lb-°F (385 J/kg·K) at room temperature, providing excellent thermal performance in heat exchange applications.

Technical Specifications

Chemical Composition (ASTM B164 Requirements)

• Nickel (including cobalt): 63.0% minimum

• Copper: 28.0-34.0%

• Iron: 2.5% maximum

• Manganese: 2.0% maximum

• Carbon: 0.3% maximum

• Silicon: 0.5% maximum

• Sulfur: 0.024% maximum

Mechanical Properties

• Tensile Strength: 70,000-85,000 psi (480-585 MPa)

• Yield Strength (0.2% offset): 25,000-45,000 psi (170-310 MPa)

• Elongation in 2 inches: 35-50%

• Hardness: Rockwell B 65-85

• Modulus of Elasticity: 26,000 ksi (179 GPa)

Customizable Size Range

We provide comprehensive sizing flexibility to meet diverse application requirements:

• Standard diameters: 0.125 inches to 12 inches (3 mm to 300 mm)

• Lengths: Random mill lengths up to 20 feet (6 meters) or cut-to-size specifications

• Tolerance: Hot-rolled bars ±0.005 inches, Cold-drawn bars ±0.002 inches

• Surface finishes: Hot-rolled, turned, polished, or centerless ground

• Special processing available including peeling, turning, and precision grinding

Industry Applications

• Marine Engineering

Monel 400 round steel serves as the ideal material for marine shafting, propeller shafts, pump components, and fasteners. Its resistance to saltwater corrosion, biofouling, and cavitation erosion makes it indispensable for offshore platforms, shipbuilding, and desalination plants. The alloy's non-magnetic properties further enhance its suitability for marine applications.

• Chemical Processing

In chemical and petrochemical industries, Monel 400 demonstrates exceptional performance in handling sulfuric acid, hydrofluoric acid, and other aggressive chemicals. The round bars are commonly machined into valve components, pump parts, mixer shafts, and heat exchanger components that require reliability in corrosive service.

• Oil and Gas Applications

The oil and gas industry utilizes Monel 400 for downhole tools, valve trim, pump components, and instrumentation parts. The material's resistance to sour gas (H₂S) environments and high-pressure conditions makes it valuable for both upstream and downstream applications.

Specialized Industrial Uses

• Aerospace: Fuel and hydraulic system components

• Power Generation: Feedwater heaters and condenser tubes

• Pharmaceutical: Process equipment requiring contamination-free performance

• Pulp and Paper: Digester and bleaching equipment components

Manufacturing and Quality Assurance

Our Monel 400 round steel undergoes rigorous quality control throughout the manufacturing process. We employ vacuum induction melting (VIM) and electro-slag remelting (ESR) techniques to ensure chemical homogeneity and purity. Each production batch includes complete traceability and material certification per ASTM B164 requirements.

Quality Documentation

• Certified Material Test Reports (CMTR)

• Chemical Analysis Certificates

• Mechanical Test Reports

• Non-Destructive Testing Reports (UT, MT, PT as required)

• Origin and Mill Certificates

Competitive Advantages

Technical Superiority
Our Monel 400 round bars offer consistent microstructure and mechanical properties through optimized hot working and heat treatment processes. The material's excellent machinability (approximately 30% relative to free-cutting brass) allows for efficient manufacturing of complex components.

Customization Capabilities
We provide comprehensive customization options including special sizes, tolerances, surface finishes, and heat treatment conditions. Our engineering team works closely with customers to develop material solutions for specific application requirements.

Supply Chain Reliability
With strategic inventory management and established relationships with premier mills, we ensure reliable delivery schedules and consistent material quality. Our stock includes various sizes and conditions to meet emergency requirements and just-in-time delivery needs.

Compliance and Certification

Our Monel 400 round steel complies with:

• ASTM B164 (Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire)

• ASME SB-164 (Boiler and Pressure Vessel Code Specification)

• NACE MR0175/ISO 15156 (Sour Service Requirements)

• Various international standards including DIN, JIS, and GB equivalents

Why Choose Our Monel 400 Round Steel?

Proven Performance
With decades of experience in supplying high-performance alloys, we have established a reputation for quality and reliability. Our Monel 400 products have been successfully implemented in critical applications worldwide.

Technical Support
Our metallurgical experts provide comprehensive technical support including material selection guidance, fabrication recommendations, and failure analysis services. We assist customers in optimizing their designs for maximum performance and cost efficiency.

Competitive Value
We offer competitive pricing without compromising quality, providing excellent value through extended service life, reduced maintenance costs, and improved operational reliability.

Environmental Responsibility
Our manufacturing processes adhere to environmental regulations and sustainability principles. Monel 400's long service life and recyclability contribute to reduced environmental impact over the product lifecycle.