ASTM B444 UNS N06625 Seamless Pipe
Alloy: UNS N06625 (Inconel 625)
Type: Seamless
Size Range: 1/8" to 24" NB
Wall Thickness: Schedule 5S to XXS
Length: Single Random: 5-7m, Double Random: 10-14m
Certification: ISO 9001, SGS test report, material certificate (MTC)
esistance: Outstanding performance in acidic, alkaline, and chloride environments
BAOHUI STEEL manufactures ASTM B444 UNS N06625 seamless pipe (Inconel 625), a nickel-chromium-molybdenum alloy strengthened by niobium. This alloy exhibits exceptional strength and toughness over a wide temperature range, from cryogenic conditions to 1800°F (980°C), along with outstanding fatigue and thermal fatigue strength. Its excellent corrosion resistance makes it suitable for the most demanding aerospace, marine, and chemical processing applications.
Key Features
Exceptional Corrosion Resistance
Outstanding performance in acidic, alkaline, and chloride environments
High Strength
Maintains excellent mechanical properties from cryogenic to high temperatures
Excellent Fatigue Strength
Superior performance under cyclic loading conditions
Good Oxidation Resistance
Resists scaling and oxidation at high temperatures
Outstanding Fabricability
Can be welded and formed using standard methods
Niobium Strengthened
Enhanced strength through solid solution hardening
Technical Specifications
|
Parameter |
Specification |
|
Standard |
ASTM B444 / ASME SB444 |
|
Alloy |
UNS N06625 (Inconel 625) |
|
Type |
Seamless |
|
Size Range |
1/8" to 24" NB |
|
Wall Thickness |
Schedule 5S to XXS |
|
Length |
Single Random: 5-7m, Double Random: 10-14m |
Chemical Composition (%)
|
Element |
Requirements |
Typical Value |
|
Nickel (Ni) |
≥ 58.0 |
61.0 |
|
Chromium (Cr) |
20.0-23.0 |
21.5 |
|
Iron (Fe) |
≤ 5.0 |
2.5 |
|
Molybdenum (Mo) |
8.0-10.0 |
9.0 |
|
Niobium (Nb) |
3.15-4.15 |
3.6 |
|
Titanium (Ti) |
≤ 0.40 |
0.2 |
|
Aluminum (Al) |
≤ 0.40 |
0.2 |
|
Carbon (C) |
≤ 0.10 |
0.05 |
|
Manganese (Mn) |
≤ 0.50 |
0.25 |
|
Silicon (Si) |
≤ 0.50 |
0.25 |
|
Phosphorus (P) |
≤ 0.015 |
0.01 |
|
Sulfur (S) |
≤ 0.015 |
0.01 |
Mechanical Properties
|
Property |
Requirements |
Typical Value |
|
Tensile Strength |
≥ 827 MPa |
930 MPa |
|
Yield Strength (0.2% Offset) |
≥ 414 MPa |
517 MPa |
|
Elongation (in 2 inches) |
≥ 30% |
40% |
|
Hardness (HB) |
≤ 290 |
220 |
Physical Properties
|
Property |
Value |
|
Density |
8.44 g/cm³ |
|
Melting Point |
1290-1350°C |
|
Electrical Resistivity |
129 μΩ·cm |
|
Thermal Conductivity |
9.8 W/m·K |
|
Coefficient of Thermal Expansion |
12.8 × 10⁻⁶/°C (20-100°C) |
Quality Commitment of ASTM B444 UNS N06625 Seamless Pipe
Certified Quality
EN 10204 3.1 material certification
Complete chemical analysis reports
Mechanical properties testing certification
Non-destructive testing reports (UT, ET)
Performance Guarantee
Hydrostatic testing per ASTM requirements
Full traceability from melt to finished pipe
Dimensional accuracy verification
Surface quality inspection
FAQ
Q: What is the maximum service temperature for UNS N06625 pipes?
A: Continuous service up to 1800°F (980°C) in oxidizing atmospheres. For higher temperatures, consider alloys with better oxidation resistance.
Q: How does Inconel 625 compare to Inconel 600?
A: Inconel 625 offers superior strength, better corrosion resistance in chloride environments, and higher temperature capability due to its molybdenum and niobium content.
Q: Can ASTM B444 pipes be welded?
A: Yes, using GTAW with Inconel 625 filler metal (ERNiCrMo-3). The alloy exhibits good weldability with proper procedures.
Q: What standards do you comply with?
A: We comply with ASTM B444, ASME SB444, and other international standards as required by the application.
Q: What is your lead time for seamless pipes?
A: Standard sizes: 15-20 days; Custom sizes: 25-30 days depending on specifications and heat treatment requirements.
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