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ASTM B443 Inconel 625 Plate and Sheet Thickness 0.5 - 30.0mm Excellent Strength & Oxidation Resistance
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xProduct Details
| Products | Nickel Alloy Sheet & Plate | Grade | Inconel 625 |
|---|---|---|---|
| Thickness | 0.5 - 30.0mm | Standard Size | 1000*2000mm 1219*2438mm |
| Standard | ASTM EN | Service | Cutting |
| Loading Port | Shanghai Port | Surface | 2B NO.1 |
Product Description
ASTM B443 Inconel 625 Plate and Sheet Thickness 0.5 - 30.0mm Excellent Strength & Oxidation Resistance
Products Specification
| Products Name | Inconel 625 Nickel Alloy Sheet Plate |
| Thickness | Cold rolled: 0.5 - 3.0mm Hot rolled 4.0 - 30.0mm |
| Standard Size | 1000*2000mm 1219*2438mm 1219*3048mm 1500*6000mm |
| Surface | 2B NO.1 |
| MOQ | 50 kgs |
| Service | Cutting, Surface Finishing |
| Packing | Waterproof paper and wooden pallets |
| Loading Port | Shanghai Port |
| Price term | FOB CFR CIF EXW |
| Payment term | 30% TT in advance , 70% TT balance against copy of B/L |
| Main Grade | Hastelloy C22 C4 X C276 G35 |
| Monel 400 K500 | |
| Incoloy 800 800H 800HT 825 925 | |
| Inconel 600 601 617 625 716 718 | |
| Stainless Steel Grade | 201 202 301 304L 309S 310S 316L 316Ti 317L 321 347 409L 410 410S 420J1 420J2 430 431 436L 439 440A/B/C 441 443 444 2205 2507 904L 254SMO 253MA |
ASTM B443 Inconel 625 Plate and Sheet – Thickness 0.5–30.0 mm, Excellent Strength & Oxidation Resistance
Product Overview
Engineered for the most demanding industrial environments, ASTM B443-compliant Inconel 625 plate and sheet (UNS N06625) offer exceptional mechanical strength, outstanding resistance to oxidation at elevated temperatures, and superior corrosion performance across a broad spectrum of aggressive media. Available in thicknesses from 0.5 mm to 30.0 mm, these nickel-chromium-molybdenum-niobium alloy flat products are ideal for aerospace, chemical processing, marine, power generation, and oil & gas applications where reliability under extreme conditions is non-negotiable.
Manufactured in strict accordance with ASTM B443 / ASME SB-443 standards, our Inconel 625 sheets and plates guarantee consistent chemistry, mechanical properties, and traceability—ensuring compliance with global engineering and safety requirements.
Why ASTM B443 Matters
ASTM B443 is the definitive specification for nickel-chromium-molybdenum-columbium (niobium) alloy plate, sheet, and strip. Compliance ensures:
- Controlled chemical composition
- Verified mechanical performance
- Uniform microstructure
- Full material traceability via Mill Test Reports (MTRs)
- Suitability for pressure equipment per ASME Boiler & Pressure Vessel Code
Key Advantages
- ✅ Outstanding Oxidation Resistance up to 980°C (1800°F)
- ✅ High Tensile & Yield Strength even at cryogenic and elevated temperatures
- ✅ Exceptional Corrosion Resistance in seawater, acids, and chloride-rich environments
- ✅ Excellent Fabricability—readily formed, machined, and welded without post-weld heat treatment
- ✅ Solid-Solution Strengthened—no need for aging or precipitation hardening
- ✅ Non-magnetic & Low Thermal Expansion—ideal for precision instrumentation
Chemical Composition (ASTM B443 Requirements)
| Element | Minimum (%) | Maximum (%) |
|---|---|---|
| Nickel (Ni) | Balance | — |
| Chromium (Cr) | 20.0 | 23.0 |
| Molybdenum (Mo) | 8.0 | 10.0 |
| Niobium + Tantalum (Nb+Ta) | 3.15 | 4.15 |
| Iron (Fe) | — | 5.0 |
| Carbon (C) | — | 0.10 |
| Manganese (Mn) | — | 0.50 |
| Silicon (Si) | — | 0.50 |
| Aluminum (Al) | — | 0.40 |
| Titanium (Ti) | — | 0.40 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.015 |
Note: Nickel content typically exceeds 58% by weight, forming the stable austenitic matrix.
Mechanical Properties (Annealed Condition, per ASTM B443)
| Property | Requirement (Minimum) | Typical Value |
|---|---|---|
| Tensile Strength (Rm) | 760 MPa (110 ksi) | 830 MPa |
| Yield Strength, Rp0.2 | 345 MPa (50 ksi) | 415 MPa |
| Elongation at Break (A5) | 30% | 40–50% |
| Hardness (HBW) | ≤ 220 | 180–210 |
Tested at room temperature; properties remain stable from -196°C to 800°C.
Physical Properties
| Property | Value |
|---|---|
| Density | 8.44 g/cm³ |
| Melting Range | 1290–1350°C (2350–2460°F) |
| Coefficient of Thermal Expansion (20–100°C) | 12.9 × 10⁻⁶ /°C |
| Thermal Conductivity (100°C) | ~9.8 W/m·K |
| Specific Heat Capacity (20–100°C) | 410 J/kg·K |
| Electrical Resistivity (20°C) | 1.29 µΩ·m |
| Modulus of Elasticity | 205 GPa |
These properties contribute to Inconel 625’s excellent thermal fatigue and thermal shock resistance, making it suitable for components exposed to rapid temperature cycling.
Available Dimensions & Finishes
| Parameter | Specification |
|---|---|
| Thickness | 0.5 mm – 30.0 mm |
| Width | Up to 2000 mm (standard); custom up to 2500 mm |
| Length | 1000 mm – 6000 mm (custom lengths available) |
| Tolerances | Per ASTM B443 (cold-rolled or hot-rolled) |
| Surface Finish | Hot-rolled (as-rolled), Cold-rolled, Pickled, 2B, BA, No.4 polish |
| Edge Type | Slit edge, mill edge, or deburred upon request |
All products include full EN 10204 3.1/3.2 Mill Test Reports with chemical and mechanical data.
Performance Highlights
Common Applications by Industry
| Industry | Typical Components |
|---|---|
| Aerospace | Jet engine exhaust systems, combustor liners, thrust vector nozzles |
| Chemical Processing | Reactor vessels, agitators, piping, heat exchangers, scrubbers |
| Marine Engineering | Subsea manifolds, risers, seawater pumps, desalination plant tubing |
| Oil & Gas | Downhole safety valves, wellhead components, flare systems (sour service rated) |
| Power Generation | Nuclear fuel element spacers, steam generator tubes, FGD ducting |
| Pollution Control | Flue gas desulfurization (FGD) absorbers, incinerator components |
Fabrication Guidelines
- Cutting: Use plasma, laser, waterjet, or abrasive saws. Avoid excessive localized heating.
- Forming: Excellent cold-forming capability. For tight radii or thick sections (>10 mm), warm forming at 300–650°C may be beneficial.
- Machining: Requires rigid setups, low cutting speeds, and ample coolant. Carbide tools with positive rake angles are recommended.
- Welding: Easily welded using GTAW (TIG), GMAW (MIG), or SMAW. Use ERNiCrMo-3 filler metal. No preheat or post-weld heat treatment needed. Clean weld area post-weld to restore full corrosion resistance.
⚠️ Note: Prolonged exposure between 600–850°C may lead to precipitation of γ'' (gamma double prime) phases, increasing strength but reducing ductility. For long-term high-temp service, consider stabilized grades if embrittlement is a concern.
Quality Assurance & Certifications
Our Inconel 625 plate and sheet are manufactured under ISO 9001-certified processes and meet:
- ASTM B443 / ASME SB-443
- AMS 5599 (Aerospace Material Specification)
- NACE MR0175 / ISO 15156 (for sour service)
- PED 2014/68/EU (Pressure Equipment Directive)
- RoHS & REACH compliant
Optional testing includes:
- Ultrasonic Testing (UT) for plates >6 mm
- Positive Material Identification (PMI)
- Intergranular Corrosion (IGC) testing per ASTM G28
Frequently Asked Questions (FAQ)
Q: What’s the difference between Inconel 625 and Inconel 718?
A: Inconel 625 is solid-solution strengthened and offers better corrosion resistance. Inconel 718 is precipitation-hardened for higher strength at 650°C but is less corrosion-resistant and requires heat treatment.
Q: Can I use Inconel 625 in seawater without coatings?
A: Yes—it’s one of the few alloys that perform reliably in untreated seawater due to its immunity to biofouling-induced pitting.
Q: Is surface finish important for corrosion resistance?
A: Smoother finishes (e.g., 2B or BA) reduce surface defects that could initiate pitting. For critical marine or chemical applications, a polished finish is recommended.
Q: How long does delivery take?
A: Standard thicknesses (0.5–10 mm) are often in stock with 1–2 week lead times. Custom orders (10–30 mm) typically require 4–6 weeks.
Sustainability & Recyclability
Inconel 625 contains over 58% recycled nickel content on average and is 100% recyclable at end-of-life. Its long service life reduces replacement frequency, lowering environmental impact across the asset lifecycle—aligning with ESG and circular economy principles.
Conclusion
For engineers and procurement professionals seeking a high-integrity, ASTM B443-certified nickel alloy solution, Inconel 625 plate and sheet (0.5–30.0 mm) deliver unmatched performance in high-temperature, high-corrosion environments. Backed by rigorous standards, global certifications, and decades of field-proven success, this premium alloy ensures safety, efficiency, and longevity in your most critical systems.
Contact us today for stock availability, technical support, or custom order quotations. Let’s engineer resilience into your next project—with confidence.
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