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Inconel 625 Flanges: High Temperature Resistance, Exceptional Corrosion Resistance, and Superior Mechanical Strength for Extreme Environments
Inconel 625 Flanges: High Temperature Resistance, Exceptional Corrosion Resistance, and Superior Mechanical Strength for Extreme Environments
Specifications
Brand Name :
DINGSCO
Model Number :
According to customers' requests
Certification :
ISO 9001：2015, PED 2014/68 EU, API 6A, API-20B, TSG, NORSOK
Place of Origin :
China
MOQ :
Negotiable
Price :
Negotiable
Payment Terms :
T/T
Supply Ability :
Negotiable
Delivery Time :
(Sample order) 7 days
Packaging Details :
According to customers' requests
Product Name :
Inconel 625 Flanges: High-Performance Solutions for Extreme Environments
Material :
Nickel-based Alloy
Grade :
INCONEL,INCOLOY,HASTELLOY,MONEL,Duplex
Dimentions :
As per your demands
Application :
Aerospace&Defense,Thermal Processing,Marine,etc
Flange Type :
WNRF, SORF, BLRF, SWRF, Lap Joint, Threaded, Orifice, Spectacle Blind
Face Type :
Raised Face, Flat Face, Ring Type Joint
Features :
High Corrosion Resistance, High Temperature Resistance, Good Mechanical Properties, Excellent Weldability
Description

Inconel 625 Flanges: High-Performance Solutions for Extreme Environments

Inconel 625 (UNS N06625) is a nickel-chromium-molybdenum alloy renowned for its extraordinary strength and superior resistance to corrosion. Inconel 625 flanges are engineered to withstand the most demanding industrial applications, from deep-sea oil extraction to aerospace exhaust systems.

Why Choose Inconel 625 Flanges?

Inconel 625 is a "workhorse" in the specialty metal industry. Unlike standard stainless steel, it maintains its integrity in environments where others fail.

  • Exceptional Corrosion Resistance: Highly resistant to pitting, crevice corrosion, and intergranular attack. It is virtually immune to chloride-induced stress corrosion cracking.

  • High Temperature Stability: Operates effectively from cryogenic temperatures up to 982°C (1800°F).

  • Superior Mechanical Strength: The combination of nickel and chromium, fortified with molybdenum and niobium, provides high fatigue strength and toughness without the need for age-hardening heat treatments.

  • Oxidation Resistance: Excellent resistance to oxidation and scaling at elevated temperatures.

Key Applications

Our Inconel 625 flanges are essential components in industries where safety and durability are non-negotiable:

  1. Marine & Offshore: Ideal for seawater piping, propeller blades, and submarine auxiliary motors due to its resistance to salt-water corrosion.

  2. Chemical Processing: Used in equipment handling highly acidic media, such as phosphoric acid or sulfuric acid environments.

  3. Oil & Gas: Crucial for sour gas (H2S) production and high-pressure wellhead components.

  4. Aerospace: High-temperature ducting systems and engine exhaust components.

  5. Nuclear Power: Core components and fuel element spacers.

Applicable Standards & Specifications
Item Specification
Material Standard ASTM B564 / ASME SB564 / UNS N06625 / DIN 2.4856
Dimension Standards ANSI B16.5, ANSI B16.47 Series A&B, MSS SP44, API-605, EN 1092-1, DIN, JIS, etc.
Pressure Ratings 150#, 300#, 600#, 900#, 1500#, 2500# (ANSI); PN6-PN64 (DIN/EN)
Flange Types Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint
Facing Types Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Size Range 1/2" to 36" (custom larger sizes available upon request)
Chemical Composition
Inconel 625 is based on a nickel matrix, with precise proportions of various alloying elements to achieve superior comprehensive performance:
Element Content (%) Function
Nickel (Ni) ≥ 58.0 Base element; provides austenitic stability and fundamental corrosion resistance
Chromium (Cr) 20.0 ~ 23.0 Forms a dense oxide layer; enhances oxidation and corrosion resistance
Molybdenum (Mo) 8.0 ~ 10.0 Improves resistance in reducing media; resists chloride-induced pitting
Niobium (Nb) 3.15 ~ 4.15 Key strengthening element; synergizes with molybdenum to provide high strength without heat treatment
Iron (Fe) ≤5.0 Controlled to ensure structural stability
Carbon (C) ≤0.10 Strictly controlled to prevent carbide precipitation affecting corrosion resistance
Cobalt (Co) ≤1.0 Controlled impurity element
Aluminum (Al) / Titanium (Ti) ≤0.40 Trace elements for microstructure stabilization
Core Mechanism: The addition of niobium works synergistically with molybdenum to strengthen the alloy matrix through solid-solution strengthening, enabling Inconel 625 to achieve high strength without requiring precipitation hardening heat treatments.
Mechanical Properties
Inconel 625 forged flanges exhibit excellent strength-toughness balance in the solution annealed condition:
Property Room Temperature At 650°C (1200°F)
Tensile Strength (Rm) ≥827 MPa (120 ksi) ≥760 MPa (110 ksi)
Yield Strength (Rp0.2) ≥414 MPa (60 ksi) ≥290 MPa (42 ksi)
Elongation (A) ≥30% ≥55%
Hardness ≤220 HB --
Temperature Adaptability: Maintains good tensile and fatigue properties from cryogenic -196°C (-320°F) up to 980°C (1800°F). Non-magnetic (permeability ≤1.0006).
Key Performance Advantages
1. Exceptional Corrosion Resistance
  • Broad-spectrum Resistance: Excellent resistance to sulfuric, hydrochloric, nitric, and phosphoric acids, as well as mixed acid environments
  • Localized Corrosion Resistance: Particularly resistant to chloride-induced pitting and crevice corrosion; suitable for seawater, brine, and high-chloride environments
  • Stress Corrosion Cracking Resistance: Certified to NACE MR-01-75; resistant to sour gas environments containing hydrogen sulfide (H₂S)
  • Oxidation Resistance: Maintains good oxidation resistance up to 982°C (1800°F)
2. Superior High-Temperature Strength
  • Melting Range: 1290-1350°C (2350-2460°F); maintains structural integrity up to 1093°C (2000°F)
  • Creep Resistance: Face-centered cubic crystal structure provides excellent creep and fatigue resistance at elevated temperatures
  • Thermal Stability: Exhibits only minimal age hardening effects after prolonged service at 550-700°C (1020-1290°F)
3. Excellent Workability and Weldability
  • Superior Weldability: ERNiCrMo-3 filler metal recommended; maintains stable performance without post-weld heat treatment
  • Cold & Hot Workability: Moderate hardness after solution treatment (≤220 HB) facilitates machining; hot working recommended above 1200°C (2190°F)
  • Formability: Elongation up to 50%, combining high strength with excellent plasticity
Heat Treatment
Inconel 625 flanges can be supplied in different heat treatment conditions based on service requirements:
Treatment Temperature Range Cooling Method Application
Solution Annealing 1093-1204°C (2000-2200°F) Water quench or air cool Stress relief, enhanced corrosion resistance; standard delivery condition
Annealing 927-1038°C (1700-1900°F) Air cool or water quench Improves ductility after cold working
Stress Relief 900°C (1650°F) Air cool Relieves residual stresses from welding or cold forming
Inconel 625 Flanges: High Temperature Resistance, Exceptional Corrosion Resistance, and Superior Mechanical Strength for Extreme Environments
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Inconel 625 Flanges: High Temperature Resistance, Exceptional Corrosion Resistance, and Superior Mechanical Strength for Extreme Environments

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Product Detail
Brand Name :
DINGSCO
Model Number :
According to customers' requests
Certification :
ISO 9001：2015, PED 2014/68 EU, API 6A, API-20B, TSG, NORSOK
Place of Origin :
China
MOQ :
Negotiable
Price :
Negotiable
Contact Supplier
Inconel 625 Flanges: High Temperature Resistance, Exceptional Corrosion Resistance, and Superior Mechanical Strength for Extreme Environments

Hunan Dinghan New Material Technology Co., LTD

Verified Supplier
3 Years
hunan, changsha
Since 1998
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Nickel Alloy Forging Bar, Nickel Alloy Forging Ring, Nickel Alloy Valve Parts
Total Annual :
70 million-100 million
Employee Number :
50~60
Certification Level :
Verified Supplier
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