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Al Jubail 35526, Saudi Arabia

Monel 400 B127 Plate

Material Grade: Monel 400 (UNS N04400)

Standard Specification: ASTM B127 / ASME SB127

Alloy Composition: Nickel-Copper (Approx. 67% Ni, 23% Cu)

Key Performance: Excellent Resistance to Seawater & Steam

Chemical Advantage: High Resistance to Hydrofluoric & Sulfuric Acid

Mechanical Property: Toughness over wide Temperature Range

Thickness Range: 0.5 mm to 50 mm

Major Industries: Marine, Offshore, & Chemical Processing

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Monel 400 (UNS N04400) Plates, manufactured under the ASTM B127 specification, are high-performance nickel-copper alloy plates known for their exceptional resistance to a wide variety of corrosive environments. Composed of approximately 67% nickel and 23% copper, Monel 400 is a solid-solution alloy that remains remarkably strong and tough across a vast temperature spectrum, from sub-zero cryogenic levels up to 450°C (840°F). It is specifically engineered for environments where standard stainless steels fail, particularly in rapidly flowing brackish water or seawater, making it the industry standard for marine engineering and offshore applications.

The technical versatility of ASTM B127 Monel 400 lies in its unique ability to resist both reducing and oxidizing conditions. It is one of the few metallic materials that can withstand contact with fluorine, hydrofluoric acid, and hydrogen fluoride, as well as their derivatives. Its superior resistance to stress corrosion cracking in most freshwaters and its immunity to chloride-ion stress cracking make it invaluable for heat exchangers, boiler feedwater heaters, and chemical processing tanks. Additionally, Monel 400 displays excellent weldability and can be easily fabricated using standard workshop processes, providing a durable and reliable solution for critical components in the oil and gas, nuclear, and aerospace sectors.

Monel 400 B127 Plate Features

» Exceptional Marine Durability: Offers outstanding resistance to corrosion in rapidly flowing seawater, brackish water, and marine atmospheres, making it superior to standard stainless steels.
» Chloride Stress Cracking Immunity: Virtually immune to chloride-ion stress corrosion cracking, ensuring long-term structural integrity in salt-heavy environments.
» Versatile Corrosion Resistance: Highly resistant to a wide range of acids and alkalis, including hydrofluoric acid, sulfuric acid, and caustic solutions under reducing conditions.
» Cryogenic to High-Temp Strength: Maintains excellent mechanical properties and toughness from sub-zero temperatures up to 450°C (840°F).
» High Erosion Resistance: Withstands the erosive effects of high-velocity steam and water, ideal for heat exchanger tubing and boiler feedwater heaters.
» Workshop Friendly: Easily fabricated through standard welding (GTAW, GMAW, SMAW), machining, and cold-forming processes common in heavy engineering.
» Solid-Solution Strength: Provides high strength and hardness through its unique Nickel-Copper metallurgy without the need for complex heat treatments.
» Low Magnetic Permeability: Remains non-magnetic over a wide range of temperatures, which is critical for specialized electronic and sensitive instrumentation applications.

Monel 400 B127 Plate Specification

Standards

ASTM Standard: B127
ASME Standard: SB127
UNS Number: N04400
WNR Number: 2.4360

Chemistry

Nickel (Ni): 63.0% Min
Copper (Cu): 28.0% – 34.0%
Iron (Fe): 2.5% Max
Manganese (Mn): 2.0% Max

Mechanical Data

Yield Strength: 195 MPa (Min)
Tensile Strength: 485 MPa (Min)
Elongation: 35% (Min)
Hardness: 60 - 80 HRB

Physical Info

Density: 8.80 g/cm³
Melting Range: 1300 - 1350°C
Thermal Cond: 21.8 W/m·K
Specific Heat: 427 J/kg·K

Size Range

Thickness: 0.5 mm to 50 mm
Width: Up to 2500 mm
Length: Up to 6000 mm
Condition: Annealed / Cold Rolled

Quality Control

MTC: EN 10204 3.1 / 3.2
Testing: Corrosion / Hardness / PMI
Compliance: NACE MR0175
Inspection: TPI (Third Party) Available

Monel 400 B127 Plate Detailed Specifications

Property	Specification
Specification	ASTM B127 / ASME SB127
Width	1000mm - 3000mm
Thickness	3mm - 100mm
Length	2000mm - 12000mm
Supply Condition	Hot-Rolled, Cold-Rolled, Annealed, and as per customer requirements.
Impact Tested	-196°C
Process of Manufacturing	Hot-Rolled, Cold-Rolled, Annealing, Pickling, and Passivation

Monel 400 B127 Plate Chemical Composition

Element	Composition %
Nickel (Ni)	63.0 - 70.0
Copper (Cu)	28.0 - 34.0
Iron (Fe)	2.5 Max
Manganese (Mn)	2.0 Max
Carbon (C)	0.30 Max
Silicon (Si)	0.50 Max
Sulfur (S)	0.024 Max
Phosphorus (P)	0.03 Max

Monel 400 B127 Plate Mechanical Properties

Property	Value
Tensile Strength	70,000 – 100,000 psi (485 – 690 MPa)
Yield Strength	30,000 psi (205 MPa)
Elongation	35% (in 8 inches / 200 mm)
Hardness	Rockwell B: 80 – 100
Modulus of Elasticity	18,000,000 psi (124,100 MPa)
Poisson's Ratio	0.31
Shear Modulus	7,300,000 psi (50,300 MPa)

Monel 400 B127 Plate Equivalent Grades

Standard	ASTM B127	ASME SB127	DIN 17750	BS 3076	ISO 9723	JIS H 4600
Equivalent Grade	UNS N04400	UNS N04400	NiCu30Fe	Monel 400	Monel 400	Monel 400

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA