Inconel 625 Bar
Round Bar Sizes: Diameter 3-800mm
Square Bar Sizes: 4 to 100mm
Hexagonal Bar Sizes: 2-100mm (Outer Diameter/End Diameter)
Standards: ASTM B446/ SB446
UNS Number: N06625/ DIN: 2.4856
Tolerances: H8, H9, H10, H11, H12, H13, K9, K10, K11, K12
Processes: Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bars
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
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- Tel: +8615824687445
Inconel 625 Rod description
GNEE Inconel 625 Bar
Inconel 625 bars (commonly known as Alloy 625 bars) are nickel-chromium-molybdenum-niobium-based high-temperature nickel-based superalloys. Due to the addition of refractory metals molybdenum and niobium, they achieve excellent tensile strength, creep rupture resistance, and extremely high fatigue life within an extreme temperature range from very low (low temperature) to 1093°C (2000°F) through solid solution strengthening, eliminating the need for aging treatment. Its greatest technical advantage lies in its superior corrosion resistance; because its nickel content is typically not less than 58%, this material is virtually immune to stress corrosion cracking, pitting corrosion, and crevice corrosion caused by chloride ions.
Types of Inconel 625 Bar Stock
ASTM B446 Gr 1 Cold Drawn Bar
Alloy Inconel 625 Square Bar
Alloy 625 Bright Bar
AMS 5666 Annealed Round Bar
Inconel 625 Rod Equivalent Material
| STANDARD | Inconel 625 |
|---|---|
| UNS | N06625 |
| WNR | 2.4856 |
| GOST | ХН75МБТЮ |
| BS | NA 21 |
| OR | ЭИ602 |
| EN | NiCr22Mo9Nb |
| JIS | NCF 625 |
| AFNOR | NC22DNB4M |
Alloy 625 Rod Specification
Inconel Alloy 625 Chemical Composition
| Element | Content | |
|---|---|---|
|
|
Nickel (Ni) | 58% min |
| Chromium (Cr) | 20% to 23% | |
| Molybdenum (Mo) | 8% to 10% | |
| Columbium + Tantalum (Nb + Ta) | 3.15% to 4.15% | |
| Iron (Fe) | 5.0% max | |
| Carbon (C) | 0.10% max | |
| Manganese (Mn) | 0.50% max | |
| Silicon (Si) | 0.50% max | |
| Phosphorus (P) | 0.015% max | |
| Sulfur (S) | 0.015% max | |
| Aluminum (Al) | 0.40% max | |
| Titanium (Ti) | 0.40% max |
Typical Inconel 625 Rod Mechanical Properties
| Property | ASTM B446 Requirement | Typical Value | Test Standard |
|---|---|---|---|
| Tensile Strength, Ultimate | ≥ 830 MPa (120 ksi) | 900 – 950 MPa | ASTM E8 |
| Tensile Strength, Yield (0.2% Offset) | ≥ 415 MPa (60 ksi) | 450 – 500 MPa | ASTM E8 |
| Elongation at Break | ≥ 30% | 35 – 45% | ASTM E8 |
| Reduction of Area | Not specified | 50 – 60% | ASTM E8 |
| Hardness (Rockwell B) | ≤ 96 HRB | 90 – 95 HRB | ASTM E18 |
| Hardness (Rockwell C) | - | ~22 HRC | ASTM E18 |
| Modulus of Elasticity | ~207 GPa (30.0 × 10⁶ psi) | - | ASTM E111 |
| Poisson's Ratio | 0.29 – 0.30 | - | - |
| Impact Toughness (Charpy V-notch, RT) | Not specified | ≥ 60 J (typical) | ASTM E23 |
Uns N06625 Rod Physical Properties
| Property | Value | Unit | Significance |
|---|---|---|---|
| Density | 8.44 | g/cm³ | Weight calculation |
| Melting Range | 1290 – 1350 | °C | Fire resistance margin |
| Thermal Conductivity (20°C) | 9.8 | W/m·K | Heat dissipation |
| Thermal Conductivity (500°C) | ~15.5 | W/m·K | High-temperature performance |
| CTE (20-100°C) | 12.8 × 10⁻⁶ | /°C | Fitting compatibility |
| CTE (20-600°C) | ~14.0 × 10⁻⁶ | /°C | High-temperature design |
| Specific Heat (20°C) | 410 | J/kg·K | Thermal capacity |
| Specific Heat (600°C) | ~500 | J/kg·K | High-temperature thermal capacity |
| Modulus of Elasticity (20°C) | ~207 | GPa | Stiffness |
| Modulus of Elasticity (600°C) | ~170 | GPa | Hot stiffness |
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Inconel 625 rods exhibit high temperature resistance and corrosion resistance
High-temperature mechanical properties of Inconel 625 bars
| Temp (°C) | Temp (°F) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Strength Retention (%) |
|---|---|---|---|---|---|
| 20 (RT) | 68 | ≥ 830 | ≥ 415 | ≥ 30 | 100% |
| 300 | 572 | ~750 | ~380 | ~35 | 90% |
| 400 | 752 | ~720 | ~370 | ~38 | 87% |
| 500 | 932 | ~680 | ~360 | ~40 | 82% |
| 550 | 1022 | ~650 | ~350 | ~42 | 78% |
| 600 | 1112 | ~600 | ~330 | ~45 | 72% |
| 650 | 1202 | ~550 | ~300 | ~48 | 66% |
| 700 | 1292 | ~500 | ~270 | ~50 | 60% |
| 800 | 1472 | ~400 | ~220 | ~55 | 48% |
High-Temperature Strength Retention
| Temperature | Strength Retention | Design Recommendation |
|---|---|---|
| 500°C | ~82% | Excellent for long-term service |
| 550°C | ~78% | Good for load-bearing |
| 600°C | ~72% | Reduce design stress |
| 650°C | ~66% | Short-term only |
| 700°C | ~60% | Limited exposure |
Inconel 625 rod corrosion resistance
| Environment | Resistance Level | Notes |
|---|---|---|
| Oxidizing Acids (HNO₃) | Excellent | - |
| Reducing Acids (H₂SO₄, HCl) | Excellent | High Mo content provides excellent resistance |
| Chloride Pitting | Excellent | - |
| Crevice Corrosion | Excellent | - |
| Chloride Stress Corrosion Cracking | Excellent | - |
| Seawater | Excellent | - |
| High-Temperature Oxidation (to 980°C) | Excellent | - |
| Sour Gas (H₂S/CO₂) | Excellent | NACE MR0175 compliant |
Corrosion Resistance Rating (1-5, 5 = best)
| Environment | Inconel 625 |
|---|---|
| Sulfuric Acid | 5 |
| Hydrochloric Acid | 5 |
| Seawater | 5 |
| Chloride SCC | 5 |
| High-Temp Oxidation (980°C) | 5 |
Stress-Rupture and Creep Properties of Inconel 625 Round Bars
| Property | Value | Test Condition |
|---|---|---|
| Stress Rupture Strength | ≥ 550 MPa | 650°C / 100h |
| Stress Rupture Strength | ≥ 450 MPa | 650°C / 1000h |
| Creep Strength (0.1% creep) | ~150 MPa | 650°C / 1000h |
| Maximum Service Temperature (Load-Bearing) | ~600°C | Long-term continuous |
| Maximum Service Temperature (Oxidation) | ~980°C | Non-load-bearing |
Alloy 625 Bar Manufacturing Process
Alloy 625 Bar Manufacturing Process
inconel 625 Bar Dimensional Specifications
inconel 625 Bar Tolerance
| Type | Dia.(inch) | Dia. Tol. | ||
|---|---|---|---|---|
| Plus | Minus | |||
| Cold Drawn | 0.0625 – 0.1875 | Excluded | Inch | |
| – | .002 | |||
| 0.1875 – 0.5 | – | .003 | ||
| 0.5 – .9375 | Included | .001 | .002 | |
| Over .9375 to 1.9375 | .0015 | .003 | ||
| Over 1.9375 to 2.5 | .002 | .004 | ||
| Hot Worked | Up to 1 | .016 | .016 | |
| Over 1 to 2 | .031 | |||
| Over 2 to 4 | .047 | .031 | ||
| Over 4 | .125 | .063 | ||
Mechanical properties of Inconel 625 bars categorized by diameter
| Diameter Range (mm) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Reduction of Area (%) |
|---|---|---|---|---|
| ≤ 25 | ≥ 830 | ≥ 415 | ≥ 35 | ≥ 55 |
| 25 – 50 | ≥ 830 | ≥ 415 | ≥ 32 | ≥ 50 |
| 50 – 100 | ≥ 830 | ≥ 415 | ≥ 30 | ≥ 45 |
| 100 – 150 | ≥ 825 | ≥ 410 | ≥ 28 | ≥ 40 |
| 150 – 200 | ≥ 820 | ≥ 405 | ≥ 25 | ≥ 35 |
Contact us to customize Inconel 625 products to fit your project dimensions
Applications of inconel 625 Alloy Bar
Applications of inconel 625 Alloy Bar
Inconel 625 Rod Nondestructive Testing (NDT) Requirements
| Test Method | Requirement | Standard | Acceptance Criteria |
|---|---|---|---|
| Ultrasonic Testing (UT) | As specified (100% for aviation) | ASTM E2375 | No defects exceeding 0.8mm |
| Eddy Current Testing (ET) | As specified (100% for tubes) | ASTM E426 | No relevant indications |
| Hydrostatic Test | 100% (tubes/pressure parts) | ASTM B444 | No leakage |
| Liquid Penetrant Inspection (LPI) | As specified | ASTM E1417 | No relevant indications |
| Visual Inspection | 100% | - | No surface defects |
Difference Between Inconel 625 and Inconel 718 Round Bar?
| Feature | Inconel 625 | Inconel 718 |
|---|---|---|
| Composition | 58% Nickel, 20% Chromium, 9% Molybdenum | 50% Nickel, 19% Chromium, 3% Iron, 5% Molybdenum |
| Max Service Temperature | Up to 1800°F (982°C) | Up to 1300°F (704°C) |
| Corrosion Resistance | Excellent (pitting, crevice, and oxidation) | Good (particularly against stress corrosion) |
| Tensile Strength | 110-130 ksi (758-896 MPa) | 130-160 ksi (896-1103 MPa) |
| Yield Strength | 70-90 ksi (483-620 MPa) | 100-130 ksi (690-896 MPa) |
| Ductility | 30% | 25% |
| Hardness | 90 HRB | 40-44 HRC (typically) |
| Applications | Aerospace, chemical processing, marine | Aerospace, oil and gas, nuclear |
| Heat Treatment | Not typically heat-treated | Heat treatable (typically 1300°F for 1 hour) |
| Standard Specifications | ASTM B443, AMS 5599 | ASTM B637, AMS 5662 |
Contact us to recommend the right alloy for your project
UNS N06625 Rod Location and Delivery Time
| Export to | Price changes and the expected delivery |
|---|---|
| Saudi Arabia | 5 % extra | 45 days |
| Brazil | 5 % extra | 30 days |
| Egypt | 5 % extra | 45 to 60 days |
| South Africa | 5 % extra | 45 to 60 days |
| Indonesia | 5 % extra | 45 to 60 days |
| Australia | 5 % extra | 45 to 60 days |
| UAE/ Dubai | 5 % extra | 45 to 60 days |
| Japan | 5 % extra | 45 to 60 days |
Contact us for the latest 2026 export prices for Inconel 625
About Gnee Alloy
Gnee Alloy specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Alloy's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
Gnee Alloy Inconel 625 certificate
FAQ
Q：What are the applications of Inconel 625?
A：Inconel 625 is a high-performance nickel-based superalloy suitable for extreme environments requiring exceptional strength, corrosion resistance, and high-temperature stability. It is widely used in the aerospace, marine engineering, and chemical processing industries to manufacture critical components such as jet engine exhaust systems, submarine parts, and offshore piping.
Q：What are the disadvantages of Inconel 625?
A：Disadvantages: High cost-due to its complex composition and high production costs, Inconel 625 is significantly more expensive than many other materials. Difficult to machine-Inconel 625 possesses high toughness, making machining challenging and requiring specialized tools and processes.
Q：What welding electrodes or filler wires are used for Inconel 625?
A：Inconel 625 welding consumables (classified as AWS ERNiCrMo-3) are premium nickel-chromium-molybdenum filler metals used for welding Inconel 625, Incoloy 825, and various super-austenitic stainless steels. They are highly valued for their superior strength and fatigue resistance, as well as their excellent resistance to corrosion, oxidation, and pitting.
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