Inconel 925

Name: China Customized Inconel 925 Manufacturers Suppliers Factory - Wholesale Service - BAOHUI Steel
Brand: BAOHUI
SKU: 282717471

Standard: ASTM B425, AMS 4528
Alloy: Inconel 925 (UNS N09925)
Form: Bar, Wire, Forging, Plate
Condition: Annealed, Aged (Solution Treated & Precipitation Hardened)
Size Range: Custom sizes available
Certification:ISO 9001, SGS test report, material certificate (MTC)

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Product Introduction

BAOHUI STEEL supplies Inconel 925 (UNS N09925), a precipitation-hardenable nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. This alloy was specifically developed for severe corrosive environments encountered in oil and gas extraction, particularly in sour gas wells containing H₂S and chlorides. Through age-hardening treatment, Inconel 925 achieves an optimal combination of high strength and excellent corrosion resistance.

Key Features

High Strength

Achieves up to 1000 MPa yield strength after aging

Excellent Corrosion Resistance

Resists sour gas, chloride ions, and acidic environments

Age-Hardenable

Can be precipitation hardened for enhanced mechanical properties

Good Sulfide Stress Cracking Resistance

Superior performance in H₂S environments

Excellent Fatigue Resistance

Maintains performance under cyclic loading

Good Fabricability

Can be welded and formed using standard methods

Technical Specifications

Parameter	Specification
Standard	ASTM B425, AMS 4528
Alloy	Inconel 925 (UNS N09925)
Form	Bar, Wire, Forging, Plate
Condition	Annealed, Aged (Solution Treated & Precipitation Hardened)
Size Range	Custom sizes available

Chemical Composition (%)

Element	Requirements	Typical Value
Nickel (Ni)	42.0-46.0	44.0
Chromium (Cr)	19.5-22.5	21.0
Iron (Fe)	22.0 min	28.0
Molybdenum (Mo)	2.5-3.5	3.0
Copper (Cu)	1.5-3.0	2.2
Titanium (Ti)	1.9-2.4	2.1
Aluminum (Al)	0.1-0.5	0.2
Carbon (C)	≤ 0.03	0.01
Manganese (Mn)	≤ 0.50	0.30
Silicon (Si)	≤ 0.50	0.20

Mechanical Properties

Property	Annealed Condition	Aged Condition
Tensile Strength	690-860 MPa	1000-1170 MPa
Yield Strength (0.2% Offset)	310-480 MPa	860-1030 MPa
Elongation	30-45%	15-25%
Hardness (HB)	180-220	290-350

Physical Properties

Property	Value
Density	8.14 g/cm³
Melting Point	1340-1400°C
Electrical Resistivity	112 μΩ·cm
Thermal Conductivity	11.4 W/m·K
Coefficient of Thermal Expansion	13.9 × 10⁻⁶/°C

Heat Treatment

The properties of Inconel 925 are developed through a specific two-step heat treatment process:

Solution Annealing

Heated to 1750°F - 1850°F (955°C - 1010°C), followed by a rapid quench (usually water). This process dissolves secondary phases and puts all alloying elements into a solid solution, resulting in a soft, workable condition.

Precipitation Hardening (Aging)

The material is then aged at a lower temperature, typically 1350°F - 1450°F (730°C - 790°C) for 24 hours, followed by air cooling. This step precipitates the gamma prime (γ') phase (Ni₃(Ti, Al)), which drastically increases the strength and hardness.

Quality Commitment

Certified Quality

EN 10204 3.1 material certificates

Heat treatment certification

Chemical analysis reports

Mechanical properties testing

Performance Verification

Corrosion testing per NACE MR0175

Non-destructive testing (UT, MT, PT)

Dimensional inspection

Microstructure examination

Comparison to Other Alloys

vs. Inconel 718

Both are precipitation-hardenable nickel alloys. 925 has better resistance to sulfide stress cracking and is often chosen specifically for sour gas service, while 718 has superior high-temperature strength (up to ~1300°F / 700°C).

vs. Incoloy 825

Incoloy 825 is a similar nickel-iron-chromium alloy with excellent corrosion resistance but is not precipitation-hardenable. It is used in the annealed condition and has lower strength than aged 925. 925 is essentially a precipitation-hardenable version of 825.

vs. Duplex & Super Duplex Stainless Steels

While duplex steels offer high strength and good chloride resistance, they are generally not suitable for service above ~300°C and can be susceptible to embrittlement. 925 is chosen for more severe conditions where duplex steels would fail.