Top SB-443, B 443, 5599 Stainless Steel Welded Pipe Supplier in China
Discover our premium welded pipes, fabricated from high-performance Alloy 625 (UNS N06625). Engineered to meet rigorous B 443 / SB-443 and AMS 5599 standards, they deliver exceptional strength at high temperatures and superior corrosion resistance for the most demanding aerospace and industrial applications.
SB-443, B 443, 5599 Welded Pipe - Detailed Specifications
| Specification Parameter | Details |
|---|---|
| International Grades | UNS: N06625, EN: 2.4856, Common Name: Alloy 625 |
| Pipe Manufacturing Standard | ASTM B705 (Welded), ASTM B775 (EFW), ASME SB705, ASME SB775 |
| Raw Material Specification | ASTM B443 / ASME SB-443, AMS 5599 (for plate, sheet, and strip) |
| Outer Diameter (OD) | 1/2 NPS to 24" NPS (21.3mm to 610mm)" |
| Wall Thickness (WT) | Schedule 10S, 40S, 80S, XS (2.11mm to 30mm) |
| Length | Up to 12 meters (40 ft), or custom-cut lengths |
| Welding Method | EFW (Electric Fusion Welded), ERW (Electric Resistance Welded) |
| Pipe Ends | Plain End (PE), Beveled End (BE) |
| Key Features | Exceptional strength and toughness from cryogenic up to 1800°F (982°C). Outstanding resistance to oxidation, corrosion, and fatigue. |
| Testing & Inspection | Hydrostatic Test, NDT (Radiography, Ultrasonic), PMI (Positive Material Identification), Chemical Analysis, Mechanical Testing (Tensile, Bend) |
| Surface Finish | Annealed and Pickled Finish |
Understanding ASTM B443 / ASME SB-443, AMS 5599
What It Is:
These are the definitive specifications for high-performance Alloy 625 plate, the foundational material for our industrial and aerospace-grade welded pipes.
B 443 / SB-443: The primary ASTM/ASME standards for industrial and pressure vessel applications, defining the chemical, mechanical, and thermal requirements for Alloy 625.
AMS 5599: The Aerospace Material Specification, which mandates even stricter controls on chemistry and processing to meet the rigorous demands of aviation and space applications.
A Blueprint for Performance: Together, they establish the essential criteria that guarantee the material’s exceptional strength and corrosion resistance from the source.
Why It Is Your Core Focus:
Our strict adherence to these standards is our guarantee of delivering unparalleled safety, reliability, and performance in every single pipe.
Guaranteed High-Temperature Strength: Compliance ensures the pipe maintains its exceptional mechanical integrity and resists creep at elevated temperatures, a critical feature of Alloy 625.
Assured Corrosion & Oxidation Resistance: Adherence certifies the unique chemical balance needed for superior performance in highly corrosive environments and resistance to high-temperature oxidation.
Mission-Critical Reliability: Meeting these standards, especially AMS 5599, qualifies the material for the most demanding, failure-intolerant systems in aerospace, chemical, and nuclear industries.
SB-443, B 443, 5599 Stainless Steel Material Properties
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 58.0 min |
| Chromium (Cr) | 20.0 - 23.0 |
| Molybdenum (Mo) | 8.0 - 10.0 |
| Niobium (Nb) + Tantalum (Ta) | 3.15 - 4.15 |
| Iron (Fe) | 5.0 max |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.50 max |
| Phosphorus (P) | 0.015 max |
| Sulfur (S) | 0.015 max |
| Aluminum (Al) | 0.40 max |
| Titanium (Ti) | 0.40 max |
| Property | Value (Minimum) |
|---|---|
| Tensile Strength | 120 ksi (827 MPa) |
| Yield Strength (0.2% Offset) | 60 ksi (414 MPa) |
| Elongation in 2 (50mm)" | 30% |
| Property | Value |
|---|---|
| Density | 8.44 g/cm³ (0.305 lb/in³) |
| Melting Range | 1290 - 1350 °C (2350 - 2460 °F) |
| Electrical Resistivity | 1.29 µΩ·m at 20°C |
| Thermal Conductivity | 9.8 W/m·K at 21°C (68°F) |
| Coefficient of Thermal Expansion | 12.8 µm/m·°C (20-100°C) |
Versatile Applications of SB-443, B 443, 5599 Stainless Steel Pipe
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Master Extreme Environments with B 443 / Alloy 625 Pipe
Secure your supply of high-performance Alloy 625 welded pipes. Manufactured to meet rigorous B 443 / SB-443 and AMS 5599 standards, they guarantee reliability in extreme environments. Submit your specifications today, and our expert team will provide a fast, detailed quotation for your critical project needs.
