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ASTM B446 Inconel 625 Round Bar: Chemical Composition and Mechanical Properties

ASTM B446 Inconel 625 Round Bar: Chemical Composition and Mechanical Properties
November 20, 2025 Admin@123
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ASTM IB446 Inconel 625 round bar

Inconel 625 is one of the most versatile, high-performance nickel-plated alloys used in industries that are resource-intensive, durable, and the first to withstand increased inspection. ASTM B446 Inconel 625 Round , Round Bar is a high quality product that is used extensively in the aerospace, marine, chemical and management industries. Manufactured using ASTM B446 material grade N06625 the round bars offer outstanding mechanical goodness, corrosion resistance and thermal , thermal stability.

If you’re looking for a supplier of ASTM B446 Inconel 625 Round Bars, Metal Forge India OFFERS a wide and wide range of UNS N06625 Round Bars , Bars manufactured from ASTM B446 N06625 grade material that meets stringent international standards of performance and quality.

Overview of Inconel ASTM B446 material grade N06625:

 Inconel 625 UNS N06625 , N06625 is a nickel-chromium-molybdenum alloy developed for use in harsh and harsh environments.  You know what? It combines the corrosion resistance of nickel and the resistance to oxidation of chromium as well as the effect of molybdenum and niobium on a large scale and capital enrichment.

 The ASTM B446 N06625 material grade ensures that Inconel 625 round bars maintain their structural integrity under high pressure, temperature and corrosion rules. This alloy is non-welding and has great machinability, forming it fitting for both welded and non-welded systems.

characteristics of ASTM B446 Inconel:

Outstanding corrosion and oxidation resistance in a wide range of environments

  1. Excellent tensile and fatigue properties from cryogenic to 1000°C (1832°F)
  2. Excellent resistance to pitting corrosion, crevice corrosion and cracks caused by chloride ions
  3. The best weldability without post-weld heat treatment
  4. High hardness and balanced flexibility at sub-zero temperatures

These factors make Inconel 625 an ideal choice for industries where strength and corrosion resistance are critical.

 Material specification Inconel 625 (ASTM B446):

The  ASTM B446 specification covers Inconel 625 round bars, rods, and wires assembled from the nickel-chromium-molybdenum-columbium (Ni-Cr-Mo-Nb) alloy. The specifications ensure stable chemical composition, mechanical components and quality in different product formats.

Specification information

Specification Details
Standard ASTM B446 / ASME SB446
Material Grade N06625
Alloy Designation Inconel 625
Form Round Bar, Rod, Wire
Condition Solution Annealed or Cold Drawn
Diameter Range 6 mm to 350 mm (Custom sizes available)

The Inconel 625 surface with a unique chemical composition has unique stainless steel-like corrosion resistance and is a source of nickel alloy. Below is the standard composition of UNS N06625 Round Bar according to ASTM B446 specification:

Chemical Content of ASTM B446 Inconel 625 Round Bar:

Element Content (%)
Nickel (Ni) 58.0 min
Chromium (Cr) 20.0 – 23.0
Molybdenum (Mo) 8.0 – 10.0
Niobium (Cb) + Tantalum (Ta) 3.15 – 4.15
Iron (Fe) 5.0 max
Cobalt (Co) 1.0 max
Manganese (Mn) 0.50 max
Silicon (Si) 0.50 max
Carbon (C) 0.10 max
Phosphorus (P) 0.015 max
Sulphur (S) 0.015 max

This combination of elements gives Inconel 625 excellent corrosion resistance, strength and balanced oxidation stability in hostile , hostile environments.

 Inconel 625 material specification, for Inconel 625 Round Bar:

The mechanical properties of Inconel 625 make it an excellent material for high-pressure applications in the aerospace, marine and chemical industries.

Property Specification
Material Name Inconel® Alloy 625
UNS Number N06625
Werkstoff Nr. 2.4856
Standards ASTM B443, B444, B446 / ASME SB443, SB444, SB446
Form Availability Sheet, Plate, Bar, Pipe, Tube, Wire, Fittings, Forgings
Nickel (Ni) 58.0 min
Chromium (Cr) 20.0 – 23.0%
Molybdenum (Mo) 8.0 – 10.0%
Niobium (Nb) + Tantalum (Ta) 3.15 – 4.15%
Iron (Fe) ≤ 5.0%
Cobalt (Co) ≤ 1.0%
Manganese (Mn) ≤ 0.50%
Silicon (Si) ≤ 0.50%
Aluminum (Al) ≤ 0.40%
Titanium (Ti) ≤ 0.40%
Carbon (C) ≤ 0.10%
Phosphorus (P) ≤ 0.015%
Sulfur (S) ≤ 0.015%
Tensile Strength 827 MPa (120 ksi)
Yield Strength (0.2% offset) 414 MPa (60 ksi)
Elongation 30%
Hardness 92 HRB (max)
Density 8.44 g/cm³
Melting Point 1290 – 1350°C
Thermal Conductivity (at 21°C) 9.8 W/m·K
Electrical Resistivity 1.29 µΩ·m
Specific Heat Capacity 410 J/kg·K
Elastic Modulus 207 GPa
Key Features Excellent corrosion & oxidation resistance, high strength, fatigue & creep resistant, non-magnetic

Benefits of ASTM B446 Inconel 625 Round Bar:

One of the main advantages of ASTM B446 Inconel 625 Round Bar is its excellent resistance to corrosion in a variety of harsh environments. The Inconel 625 corrosion resistance data are given below: 

 Oxidation resistance:

Inconel , Inconel 625 is highly resistant to oxidation up to 1000°C, making it suitable for gas turbine and aerospace applications.

Abrasion and crack resistance:

Due to its high , high content of molybdenum and niobium, the alloy resists localized corrosion and is compatible with highly acidic and chloride environments.

 Resistance to acids and chemicals:

The alloy shows remarkable resistance in phosphoric nitric and sulfuric acid environments as well as in seawater and industrial wastewater.

Stress corrosion cracking:

For the first time, Inconel 625 resists corrosion cracking caused by chloride ions, a regular , regular problem in marine , marine and chemical applications.

Inconel 625’s impressive corrosion resistance data facilitates its use in critical environments such as offshore oil platforms, heat exchangers and chemical reactors.

ASTM B446 Inconel 625 Round Bar Applications

Due to its properties, corrosion resistance and manufacturing versatility, UNS N06625 Round Bar can be used in a bunch of industries:

Aviation industry: jet engine exhaust, turbine , turbine blades and duct , duct systems

Naval architecture: seawater pipe systems, propeller blades and offshore platforms

Chemical processing: heat exchangers, reactors and pollution control equipment

Efficiency improvement: gas turbine parts, heat pipes and boiler parts

Nuclear industry: reactor core and containment components

The combination of mechanical performance and resistance to corrosion and oxidation make Inconel 625 an alloy suitable for extreme in-service control.

 Why Choose Metal Forge India as your supplier of ASTM B446 Inconel and  Inconel 625 Round Bar?

ASTM B446 Inconel 625 Round , Round Bar is a premium architectural material known for its amazing combination of strength, corrosion resistance and versatility… Due to its strong chemical composition and excellent mechanical components, its the preferred choice for critical applications in high temperatures and corrosive environments.

Major advantages:

Wide range of UNS N06625 round bars in various sizes and designs

  1.  Personalized decisions according to the customer’s specifications
  2. Certified Material Test Reports (MTC) and Third Party Inspection
  3. Ideal pricing and timely delivery both in India and abroad

By purchasing from Metal Forge India ASTM B446 Inconel 625 Round Bar supplier in Mumbai, you’re guaranteed to get Inconel 625 material that meets or exceeds ASTM B446 standards for performance and quality.

ASTM B446 Inconel 625 Round Bar is a premium architectural material known for its amazing combination of strength, corrosion resistance and versatility. Due to its strong chemical composition and excellent mechanical components it is the preferred choice for critical applications in high temperatures and corrosive environments.

Whether you need Inconel 625 for marine, aerospace or chemical processing industries, Contact us today MetalForgeIndia is your trusted friend for quality , quality ASTM B446 N06625 products.

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