Hardness testing to ISO 6508-1
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Stainless Steel 904L Stud Bolts, also known as 1.4539, is a high-alloy austenitic stainless steel primarily designed for applications requiring excellent corrosion resistance, especially in aggressive environments. Stud bolts made from Stainless Steel 904L are commonly used in industries where corrosion resistance and durability are crucial. Here are some key features, machining considerations, and applications for Stainless Steel 904L stud bolts (1.4539):
Features of Stainless Steel 904L (1.4539):
Corrosion Resistance: One of the primary reasons for using Stainless Steel 904L is its exceptional corrosion resistance, particularly in environments with high concentrations of sulfuric acid, such as the chemical processing industry and the offshore oil and gas sector.
High Alloy Content: Stainless Steel 904L contains a high percentage of nickel, chromium, and molybdenum, which contributes to its corrosion resistance and overall performance.
Pitting and Crevice Corrosion Resistance: This alloy offers excellent resistance to pitting and crevice corrosion, making it suitable for use in chloride-rich environments.
High Strength: It has good mechanical properties, including high tensile and yield strength, making it a reliable choice for applications requiring robust stud bolts.
Weldability: Stainless Steel 904L is weldable, although special precautions may be needed to maintain its corrosion resistance after welding.
Specifications | ASTM A 193 / ASME SA 193 |
Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Length | 3 to 200 mm |
Standard | ISO, ASTM, DIN, JIS, IS, GB, BS, and all International Standards |
DIN Standard | B.S. DIN 931, DIN 933, DIN 912, DIN 934, DIN 6923, DIN 603, DIN 7981, DIN 970, DIN916, DIN 7982, DIN 7985, DIN 913 |
UTS | NPT, UNS, UNF, UNC, UNEF, NPTF |
ISO | ISO 4033, ISO 4032, ISO 7380, ISO 4017, JIS standards |
Threads | METRIC, BSW, UNC, UNF, BSF or as required |
Machining Considerations:
Machining Stainless Steel 904L can be more challenging compared to standard austenitic stainless steels due to its high alloy content and work-hardening tendencies. Here are some machining considerations:
Cutting Tools: Use high-speed steel or cemented carbide cutting tools for machining. Carbide tools are preferred for their ability to withstand the work-hardening effect.
Low Cutting Speeds: Reducing cutting speeds and using higher feed rates can help minimize work hardening and tool wear.
Coolant and Lubrication: Adequate coolant or lubrication is necessary to dissipate heat and prevent overheating during machining.
Stress Relief Annealing: After machining, stress relief annealing may be required to restore some of the alloy's corrosion resistance properties.
Applications:
Stainless Steel 904L stud bolts (1.4539) are used in a variety of industries and applications, including Chemical Processing, Oil and Gas, Pharmaceutical and Biomedical, Desalination Plants, Marine and Shipbuilding, Heat Exchangers, etc.
Stainless Steel 904L stud bolts are chosen for applications demanding exceptional corrosion resistance and robust mechanical properties, particularly in aggressive chemical and marine environments. Proper machining, welding, and maintenance procedures should be followed to maximize the alloy's performance.
To preserve the high standards of our selection of industrial stud bolts, we have always adhered to a systematic quality management process.
Our staff of experts is vibrant and talented, and they have always been our largest supporters and contributors to our success. Our vision is to create a world of stud bolts.
STANDARD | WERKSTOFF NR. | UNS | JIS | KS | BS | AFNOR | EN |
SS 904L | 1.4539 | N08904 | SUS 904L | STS 317J5L | 904S13 | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
SS 904L | 0.020 max | 2.00 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 23.00 – 28.00 | 1.00 – 2.00 |
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 25 % |
Hardness testing to ISO 6508-1
Nut proof load testing to ISO 898-2
Suitability for preloading to EN 14399-2
Calibrated gauges and tools
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