Incoloy Rod Incoloy 925 Alloy Bar for High Temperature Pressure Vessels and High-Pressure Systems

‌1. Product Information‌

‌Product Name‌: Incoloy 925 Bar (Sulfide Stress Corrosion Resistant Grade)
‌Material Type‌: Nickel-Iron-Chromium-Molybdenum-Copper Alloy (Age-Hardenable)
‌Standards‌: ASTM B425, NACE MR-0175/ISO 15156, UNS N09925, API 6ACRA
‌Forms Available‌: Hot-rolled bars, cold-drawn precision bars, and solution-treated blanks.
‌Diameter Range‌: 12 mm to 350 mm (custom sizes up to 500 mm).
‌Surface Finish‌: Peeled, ground (Ra ≤ 0.8 μm), or shot-peened.
‌Heat Treatment‌:

• Solution Annealing: 885-925°C (1625-1700°F) + water quench

• Aging: 620-650°C (1150-1200°F) for 16 hours

‌Mechanical Properties‌:

• Yield Strength: 760-965 MPa (110-140 ksi)

• Hardness: 28-35 HRC

Certifications‌: NORSOK M-630, DNVGL-RP-F112, ISO 13680 for OCTG.

‌2. Characteristics‌

Incoloy 925 bars are engineered for extreme H₂S and chloride environments:

• ‌Sulfide Stress Cracking (SSC) Resistance‌: Threshold stress >90% AYS in NACE TM0177 Solution A.

• ‌Chloride Pitting Resistance‌: Critical pitting temperature (CPT) >100°C in 25% NaCl per ASTM G48.

• ‌High-Temperature Strength‌: Retains 85% yield strength at 400°C (750°F).

• ‌Hydrogen Embrittlement Immunity‌: No cracking after 720-hour testing in H₂S-saturated brine.

• ‌Aging Response‌: γ' (Ni₃Ti) precipitation increases hardness by 15 HRC post-treatment.

• ‌Fatigue Performance‌: Endurance limit of 450 MPa (65 ksi) at 10⁷ cycles (R=-1).

‌3. Technology‌

‌Manufacturing Process‌:

• ‌Triple Melt Process (VIM + ESR + VAR)‌: Achieves S < 0.002%, O₂ < 20 ppm.

• ‌Controlled Forging‌: At 950-1100°C with 4:1 reduction ratio to refine grain structure.

• ‌Precision Aging‌: Multi-stage aging at 595°C + 650°C to optimize γ' precipitate distribution.
  ‌Quality Control‌:

• Automated ultrasonic testing (AUT) for internal defects (sensitivity 0.5 mm).

• Slow strain rate testing (SSRT) per NACE TM0198.

• Hydrogen charging simulation with 1 atm H₂ at 200°C for 48 hours.

‌4. Theory‌

The alloy’s sour service performance originates from:

• ‌Molybdenum-Titanium Synergy‌: Mo provides solid solution strengthening, while Ti forms γ' precipitates (Ni₃Ti) for age hardening.

• ‌Copper-Enhanced Passivation‌: Cu promotes Cr₂O₃-MoO₃ oxide layer regeneration in H₂S environments.

• ‌Nickel Matrix Dominance‌: High Ni (>42%) stabilizes austenitic structure against hydrogen ingress.

• ‌Carbon Control‌: Ultra-low C (<0.03%) prevents Cr-carbide formation at grain boundaries.

• ‌Dislocation-Precipitate Interaction‌: γ' particles (10-50 nm) obstruct dislocation movement, enhancing yield strength.

‌5. Application‌

Incoloy 925 bars are critical in aggressive hydrocarbon extraction:

• ‌Downhole Tools‌:

• Subsurface safety valve components, packer mandrels, and ESP shafts.

• ‌Well Completion‌:

• H₂S-resistant hangers, Christmas tree bolts, and blowout preventer (BOP) parts.

• ‌Pipeline Systems‌:

• Clad weld overlay on carbon steel pipes for sour gas transmission.

• ‌Refining‌:

• Hydrotreater reactor internals and sour water stripper column trays.

6. Parameters

Our Advantage

1. Market Leader

Top 5 in China's nonferrous metal industry

2. Flexible products

Thousands of product specifications,Meet multiple needs of buyers

3. Low MOQ

Can customize samples

4. Short production lead time，fast delivery of whole cabinet

5. Professional inspection equipment

Before delivery, we will use spectrometers, tensile testers and other professional equipment to conduct a comprehensive inspection of the products to ensure that the goods are qualified for acceptance

6. Professional business team

Quickly responds to customer inquiries,24-hour professional quotation online

The salesperson will follow the customer's requirements for the use of the product,Professionally recommend more appropriate performance and price products to customers

7. Intact packaging

Packaging according to customer needs.You can customize wooden boxes to ensure that the goods arrive at the destination in good condition

8. Various payment methods

Facilitate customer payment

9. Get good reviews from customers

Old customers have long-term cooperation,The longest is more than 7 years

10. Received various awards

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