Project Description
Magnadur 601 Non-Magnetic Stainless Steel
Product Description
Magnadur 601 is an advanced non-magnetic stainless steel developed by Deutsche Edelstahlwerke GmbH, featuring exceptional non-magnetic properties with permeability μ < 1.01. This premium alloy combines outstanding strength with superior corrosion resistance, particularly against stress corrosion cracking (SCC). With a carefully balanced chemical composition including 16.5-17.5% chromium, 4.20-5.00% nickel, and 2.00-2.80% molybdenum, Magnadur 601 provides enhanced stress corrosion cracking resistance even at tensile stresses below 0.5 x yield strength. Its high molybdenum content contributes to superior pitting corrosion resistance compared to similar non-magnetic alloys, making it the preferred choice for critical applications in aggressive environments.
Applications
Magnadur 601 is specifically engineered for petroleum measurement applications requiring exceptional non-magnetic properties combined with superior corrosion resistance. It is particularly suitable for downhole measurement instruments, advanced drill collars, and sophisticated measurement-while-drilling (MWD) equipment operating in highly corrosive environments. The material’s excellent resistance to stress corrosion cracking makes it ideal for components subject to significant mechanical stress in sour service conditions. With a pitting corrosion potential far better than Magnadur 501 and superior performance to Magnadur 509, it is the optimal choice for precision measurement tools in the most aggressive petroleum environments where both magnetic neutrality and structural integrity are essential.
Standards
Magnadur 601 is manufactured as a non-standard special steel from Deutsche Edelstahlwerke GmbH. It complies with the following standards:
- ASTM corrosion testing protocols
- PREN value: 29.5-35 (Pitting Resistance Equivalent Number)
- PREN formula: %Cr + 3.3x %Mo + 16x %N
The alloy demonstrates excellent resistance against stress corrosion cracking, with tensile stresses typically remaining below 0.5 x yield strength in service.
Chemical Composition and Grade Comparison
Chemical Composition (in weight-%)
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| Min. | – | – | 18.0 | – | – | 16.5 | 4.20 | 2.00 | 0.40 |
| Max. | 0.05 | 0.30 | 20.0 | 0.03 | 0.005 | 17.5 | 5.00 | 2.80 | 0.50 |
Mechanical Properties
Magnadur 601 offers exceptional mechanical properties in forged and work-hardened condition at room temperature:
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density at 20°C | 7.79 kg/dm³ | 0.281 lb/in³ at 68°F |
| Young’s modulus | 196.5 GPa at 20°C | 28.5 x 10⁶ ksi at 68°F |
| Thermal conductivity at 20°C | 12.8 W/(m·K) | 88.83 BTU·in/(h·ft²·°F) at 68°F |
| Thermal conductivity at 100°C | 14.6 W/(m·K) | 101.32 BTU·in/(h·ft²·°F) at 212°F |
| Thermal conductivity at 200°C | 16.3 W/(m·K) | 113.12 BTU·in/(h·ft²·°F) at 392°F |
| Thermal conductivity at 300°C | 17.3 W/(m·K) | 120.06 BTU·in/(h·ft²·°F) at 572°F |
Mechanical Properties in Forged and Work-Hardened Condition
| Diameter Range | 75-235 mm (3-9¼”) | >235-250 mm (>9¼-9¾”) |
|---|---|---|
| Hardness in HB | 300-400 | 300-400 |
| Min. Yield Strength (Rp0.2) | 965 MPa (140 ksi) | 900 MPa (130 ksi) |
| Min. Tensile Strength (Rm) | 1035 MPa (150 ksi) | 1035 MPa (150 ksi) |
| Min. Elongation (A5) | 20% | 20% |
| Min. Reduction of Area (Z) | 50% | 50% |
| Min. Impact Energy (AV) | 135 J (100 ft-lbs) | 135 J (100 ft-lbs) |
| Min. Fatigue Strength | 445 MPa (65 ksi) | 445 MPa (65 ksi) |
Thermal Properties
| Property | Metric | Imperial |
|---|---|---|
| Thermal expansion coefficient (20°C-100°C) | 14.6 x 10-6K-1 | 8.11 x 10-6F-1 (68°F-212°F) |
| Thermal expansion coefficient (20°C-200°C) | 16.3 x 10-6K-1 | 9.06 x 10-6F-1 (68°F-392°F) |
| Thermal expansion coefficient (20°C-300°C) | 16.4 x 10-6K-1 | 9.11 x 10-6F-1 (68°F-572°F) |
| Specific heat capacity at 20°C | 0.47 kJ/(kg·K) | 0.112 BTU/(lb·°F) at 68°F |
| Specific heat capacity at 100°C | 0.51 kJ/(kg·K) | 0.122 BTU/(lb·°F) at 212°F |
| Specific heat capacity at 200°C | 0.53 kJ/(kg·K) | 0.127 BTU/(lb·°F) at 392°F |
| Specific heat capacity at 300°C | 0.55 kJ/(kg·K) | 0.131 BTU/(lb·°F) at 572°F |
Available Dimensions
SHUNFU METAL supplies Magnadur 601 in the following dimensions:
- Round Bars: Diameter range from 20 mm to 280 mm (0.8″ to 11″)
- Hollow Bars: Outer diameter from 75 mm to 250 mm (3″ to 10″) with various wall thicknesses
Custom dimensions are available upon request to meet specific project requirements.
Corrosion Resistance
Magnadur 601 demonstrates exceptional resistance against stress corrosion cracking, with tensile stresses typically remaining below 0.5 x yield strength in service conditions. The pitting corrosion potential is far superior to Magnadur 501, and although the PREN values of Magnadur 509 and 601 fall in the same approximate range (29.5-35), Magnadur 601 outperforms with regard to pitting corrosion due to its higher molybdenum content. This makes it particularly valuable for applications in environments with aggressive chloride-containing media where conventional non-magnetic steels would fail. The combination of high molybdenum content and optimized nitrogen levels provides a robust defense against both general and localized corrosion.
Why Choose SHUNFU METAL for Magnadur 601
When sourcing Magnadur 601 non-magnetic stainless steel for your critical petroleum measurement applications, SHUNFU METAL delivers superior quality and service. Our inventory of Magnadur 601 meets the most stringent industry standards and undergoes comprehensive quality control to ensure consistent performance in the most challenging downhole environments. We understand the critical importance of combining non-magnetic properties with exceptional corrosion resistance in advanced measurement-while-drilling operations and provide complete material traceability and certification.
Our technical experts can assist you in selecting the optimal specification of Magnadur 601 for your specific application requirements, ensuring maximum performance and service life of your equipment. With competitive pricing, reliable global shipping, and responsive customer service, we aim to be your trusted partner for specialty steel solutions.
Contact us today with your Magnadur 601 requirements. Our team is ready to provide detailed quotations and technical support to help you select the ideal material specification for your most demanding projects.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
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- Fire Protection
- Heating & Air Conditioning
Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets we serve. Just give us a call +86-731-89903933.
