Table of Contents
- Inconel 625 Square & Hex Bars Overview
- Technical Specifications
- Chemical Composition & Mechanical Properties
- Types of Inconel 625 Bars: Hexagonal & Square Profiles
- Key Advantages of Inconel 625 Square & Hex Bars
- Key Applications of Inconel 625 Square & Hex Bars
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Inconel 625 Square & Hex Bars Overview
Solid-solution strengthened by molybdenum and niobium, ASTM B446 UNS N06625 Square Bars deliver superior strength up to 982 °C without age-hardening heat treatments. Aurum Overseas is a premier Inconel 625 Square Bar Supplier and Inconel 625 Hex Bar Supplier, stocking mill-certified Alloy 625 Bars for fast dispatch.
As an Inconel 625 Square Bar Exporter and Inconel 625 Hex Bar Exporter, we supply precision ASTM B446 UNS N06625 Hexagonal Bars engineered for fast CNC machining into valve stems and fasteners. The high nickel-molybdenum matrix provides extreme resistance to chloride pitting, crevice attack, and stress corrosion cracking.
We supply certified Nickel Alloy 625 Bars compliant with ASTM B446 and Werkstoff 2.4856 to chemical, marine, and offshore projects across the USA, UK, Germany, UAE, and Saudi Arabia. Contact us today for instant quotes and mill test certificates.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM B446 Grade 1 / Grade 2, ASME SB446, AMS 5666, BS 3076 NA21 |
| UNS Designation | UNS N06625 |
| EN / AFNOR Designation | NiCr22Mo9Nb / NC22DNB4M |
| 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, Custom Precision Cut-to-Length |
| Surface Finishes | Cold Drawn, Bright Annealed, Centerless Ground, Hot Rolled, Forged |
| Heat Treatment Condition | Grade 1 (Annealed at 871 °C min) / Grade 2 (Solution Annealed at 1093 °C min) |
| Dimensional Tolerances | ASTM B446 / ISO 286-2 (h9, h10, h11 profile tolerances) |
| HSN Code | 75052200 |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Standard / Grade | Werkstoff Nr. | UNS Designation | JIS Standard | EN Standard |
|---|---|---|---|---|
| Inconel 625 | 2.4856 | N06625 | NCF 625 | NiCr22Mo9Nb |
Chemical Composition (%)
| Element | Specification Range (UNS N06625) | Nominal Bar Analysis |
|---|---|---|
| Nickel (Ni) | 58.0 min | 61.0 |
| Chromium (Cr) | 20.0 – 23.0 | 21.5 |
| Molybdenum (Mo) | 8.0 – 10.0 | 9.0 |
| Niobium + Tantalum (Nb + Ta) | 3.15 – 4.15 | 3.65 |
| Iron (Fe) | 5.0 max | 3.5 |
| Manganese (Mn) | 0.50 max | 0.20 |
| Silicon (Si) | 0.50 max | 0.25 |
| Aluminum (Al) | 0.40 max | 0.15 |
| Titanium (Ti) | 0.40 max | 0.20 |
| Carbon (C) | 0.10 max | 0.04 |
| Phosphorus (P) | 0.015 max | 0.008 |
| Sulfur (S) | 0.015 max | 0.002 |
Mechanical & Physical Properties
| Property Parameter | Metric Units | Imperial Units |
|---|---|---|
| Density | 8.4 g/cm³ | 0.303 lb/in³ |
| Melting Point | 1350 °C | 2460 °F |
| Tensile Strength (Min) | 930 MPa | 135,000 Psi (135 ksi) |
| Yield Strength (0.2% Offset, Min) | 517 MPa | 75,000 Psi (75 ksi) |
| Elongation (Min) | 42.5 % | 42.5 % |
Types of Inconel 625 Bars: Hexagonal & Square Profiles
Aurum Overseas supplies Inconel 625 (UNS N06625) bars in precision hexagonal and square profiles for high-temperature marine and aerospace applications.
Inconel 625 Hex Bars
Inconel 625 Square Bars
Key Advantages of Inconel 625 Square & Hex Bars
Solid-Solution Matrix Strength
Molybdenum (8.0–10.0%) and niobium (3.15–4.15%) provide exceptional strength up to 982 °C without age-hardening heat treatments.
Extreme Chloride Immunity
Elevated chromium and molybdenum contents deliver a PREN > 45, resisting pitting and crevice corrosion in stagnant seawater.
High-Temperature Oxidation Shield
Forms an adherent oxide layer that prevents scaling and oxidation during severe thermal exposure.
Thermal Fatigue Resistance
High yield strength (517 MPa min) prevents cracking during repeated rapid heating and cooling cycles.
Key Applications of Inconel 625 Square & Hex Bars
| Industry | Applications | Operational Benefit |
|---|---|---|
| Marine & Subsea | Subsea fastener stock, hex valve trim, propeller shafts | Prevents crevice attack and stress corrosion failure in marine splash zones. |
| Aerospace & Defense | Thrust reverser linkages, fuel line fittings, turbine mounts | Maintains structural integrity under severe mechanical vibration and high thermal loads. |
| Chemical Processing | Acid agitators, hex plugs, square flange blocks | Resists organic and inorganic acids including wet chlorine gas and hot phosphoric acid. |
| Nuclear Engineering | Control rod components, core structural supports | Resists neutron radiation embrittlement and high-temperature pressurized water corrosion. |
Quality Testing & Inspection
As a quality-driven Inconel 625 Square Bar Exporter and Inconel 625 Hex Bar Exporter, Aurum Overseas subjects every production lot to strict quality control verification:
- Positive Material Identification (PMI): 100% XRF spectroscopic testing verifying minimum 58.0% Ni, 20.0–23.0% Cr, and 8.0–10.0% Mo content.
- Mechanical Property Validation: Room temperature and elevated temperature tensile testing per ASTM E8 and ASTM B446.
- Pitting & Crevice Testing: Corrosion testing in accordance with ASTM G48 Method A (Ferric Chloride Pitting Test).
Global Export Markets
As an established Inconel 625 Square & Hex Bar Exporter, Aurum Overseas supplies fully certified ASTM B446 UNS N06625 bars to global marine, aerospace, chemical, and nuclear facilities:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Niobium and molybdenum distort the nickel-chromium matrix, raising the base metal yield strength to 517 MPa minimum without requiring precipitation hardening or quenching heat treatments.
Hexagonal bars provide optimal geometry for producing threaded fasteners, nuts, and valve body fittings on automated CNC lathes with reduced material scrap, while square bars offer square face alignment for structural brackets and manifolds.
Grade 1 material is annealed at 871 °C minimum for maximum ductileness and high-temperature tensile strength up to 649 °C, while Grade 2 is solution annealed at 1093 °C minimum for creeping and rupture resistance above 649 °C.
All shipments from Aurum Overseas include full EN 10204 3.1 Mill Test Certificates detailing chemical analysis, heat treatment batch charts, mechanical test results, and NDT clearance.
Contact Aurum Overseas
Partner with a trusted Inconel 625 Square Bar Supplier and global Exporter for certified nickel alloy stock, custom sawing services, and fast international dispatch.