In the realm of extreme operating conditions, Inconel 625 round bar (UNS N06625 / 2.4856) is undoubtedly the gold standard. Combining the strengths of nickel, chromium, and molybdenum, this high-performance alloy offers exceptional corrosion resistance and high mechanical strength, maintaining stable performance across a temperature range spanning from cryogenic levels up to 980°C (1800°F).
However, for procurement managers and CNC machine shop owners, the primary challenge lies in the difficulty of machining the material. While sourcing the material is straightforward, the real challenge is machining it effectively without damaging cutting tools-all while meeting rigorous quality control standards. Gnee Alloy not only supplies premium metal materials but also provides comprehensive technical specifications and expert machining guidance, fully ensuring the industrial quality and reliability of your projects.
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Inconel 625 Round Bar (UNS N06625 / W.Nr. 2.4856) Guide
Inconel 625 Round Bar (UNS N06625 / W.Nr. 2.4856) Guide
As a leading supplier of high-performance nickel alloys, Gnee Alloy manufactures premium Inconel 625 round bars (UNS N06625) that offer exceptional corrosion resistance and mechanical stability.
Inconel 625 (UNS N06625 / W.Nr. 2.4856) is a nickel-chromium-molybdenum alloy renowned for its outstanding strength, excellent corrosion resistance, and superior fabricability-including exceptional weldability. It is suitable for a wide operating temperature range, extending from cryogenic levels up to 1800°F (982°C), making it one of the most versatile high-temperature alloys for demanding industrial applications.
Our Alloy 625 round bars and rods are produced in strict accordance with ASTM B446 standards, ensuring precise chemical composition, stable mechanical properties, and consistent product quality. Through advanced hot-rolling and cold-drawing processes, we achieve excellent roundness, dimensional accuracy, and a uniform microstructure.
How is Inconel 625 hardened?
This process helps increase the material's strength and hardness. The precipitation hardening temperature for Inconel 625 typically ranges from 540°C to 620°C, with a holding time of approximately 8 hours.
1. Chemical Composition of Inconel 625 Round Bar (UNS N06625)
| Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|---|
| 625 | ASTM B443 | ≤0.1% | ≤0.50% | ≤0.50% | ≤0.015% | ≤0.015% | 20.00-23.00 | ≥58.0% | 8.0-10.0 |
2. Inconel 625 Round Bar (UNS N06625) Mechanical Properties
| Grade | Yield Strength (0.2% Offset) | Melting Point | Density | Tensile Strength | Elongation |
|---|---|---|---|---|---|
| 625 | MPa – 276 | 1350°C (2460°F) | 8.44 g/cm³ | MPa – 690 | Min. 30% |
3. Inconel 625 Round Bar (UNS N06625) Physical Properties
| Melting Range | Specific Heat Capacity, 20°C (J/(g·K)) | Magnetic Permeability (20°C) | Thermal Conductivity, 20°C (W/(m·K)) | Curie Temperature (°C) |
|---|---|---|---|---|
| 1350°C (2460°F) | 410 | <1.001 | 9.9 | -196 |
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4. Inconel 625 Round Bar (UNS N06625) Specifications and Standards
Outer Diameter Range: φ4mm – φ500mm
Length: 50mm – 6000mm
Please confirm custom sizes with our team.
Grade: 625 / UNS N06625 / W.Nr. 2.4856
Standards: ASTM B446
ASTM B564
ASME SB 446
ASME SB 564
SAE AMS 5666
SAE AMS 5837
ISO 9723
ISO 9724
ISO 9725
VdTUV 499
BS 3076NA21
EN 10095
Per DIN 17752
Per DIN 17754
Per DIN 17753
Delivery Condition: Cold-drawn, hot-rolled, forged, ground, centerless ground
Surface Finish: Bright, polished, mirror finish, brushed, pickled, peeled, black
Aircraft ducting and exhaust systems
Engine thrust-reverser systems
Turbine shroud rings
Bellows and expansion joints
Gaskets and damping seals
Racing exhaust pipes and clamps
Weld overlays and gaskets for heat recovery systems
Furnace components
Valve seats and components
6. Inconel 625 Round Bar (UNS N06625) Drawings and Specifications
Formula: m = D (mm) × D (mm) × L (m) × ρ (g/cm³) × π ÷ 4000
D = Diameter, L = Length, ρ = Density, π = 3.1415926…
7. Gnee Alloy Inconel 625 Value-Added Services
8. Pitting Resistance Equivalent Number (PREN) for Inconel 625 Round Bar
Inconel 625 PREN: 40.8
The Pitting Resistance Equivalent Number (PREN) uses an alloy's chemical composition to estimate its resistance to pitting corrosion. It takes into account the content of chromium, molybdenum, tungsten, and nitrogen. These elements contribute to the material's corrosion resistance. The most commonly used formula is:
PREN = Cr% + 3.3 x (Mo% + 0.5 x W%) + 16 x N%
9. How to Purchase Inconel 625 Round Bar (UNS N06625)
When purchasing Inconel 625 round bar, having the correct material details and information is crucial to ensuring a smooth procurement process and obtaining a product that meets your needs.
You will need to provide the following information:
1. Material: Specify the material grade, 625 (UNS N06625).
2. Dimensions: Specify the diameter and length of the round bar.
3. Quantity: Provide the number of bars required for an accurate quote.
4. Technical Specifications: Include technical specifications and drawings. Detailed drawings may be attached if there are special design requirements.
5. Quality Standards: Clearly state quality standards and inspection requirements, such as third-party inspection, material certification, and inspection report requirements.
6. Special Requirements: Specify any particular requirements regarding surface finish, polishing, corrosion resistance, etc.
7. Packaging Requirements: Specify any special packaging needs, such as protective or anti-corrosion packaging.
8. Delivery: Indicate the expected delivery time and location.
Having this information ready will streamline the purchasing process and ensure you receive a high-quality product that meets your specifications.
Contact our professionals to recommend the right alloy for your project
Gnee Alloy Product Packaging
All stainless steel products are:
✅️Packed in wooden pallets or crates
✅️Covered with moisture-proof wrapping
✅️Labeled with heat number, standard, and size
✅️Shipped worldwide via sea, air, or express
Gnee Alloy 625 Alloy Packaging
Gnee Alloy Production Equipment and Product Testing
Contact us now to get the latest export price for Inconel 625 in 2026
FAQ
Q1: Is Inconel 625 interchangeble with 2.4856?
A: Yes. 2.4856 is the Werkstoff number used in the German/DIN system for the exact same metallurgical system as UNS N06625. We provide documents proving total parity with both standards.
Q2: Does Inconel 625 require post-weld heat treatment?
A: Generally, No. Unlike Alloy 718, Inconel 625 is a solid-solution strengthened alloy and is used in the as-welded condition, which is a massive Cost-effective Solution for field repairs.
Q3: What is the benefit of h9 tolerance ground rods?
A: By providing Precision Ground bright rods, we eliminate "bar whipping" in automated feeders and Swiss-lathes, ensuring a Smooth Finish and zero dimensional scrap.
Q4: Do you support small batch R&D orders?
A: Absolutely. We support aerospace and energy innovation with Flexible MOQs on our in-stock inventory of bars and sheets.
