Hardness testing to ISO 6508-1
A Stainless Steel A4-70 Hex Bolt is a specific type of fastener made from stainless steel alloy known as A4-70. This classification indicates its material composition and mechanical properties. Here are some key features and characteristics of A4-70 stainless steel hex bolts:
Material Composition: A4-70 stainless steel is primarily composed of iron, chromium, nickel, and molybdenum. This combination of elements imparts excellent corrosion resistance and mechanical strength.
Corrosion Resistance: A4-70 stainless steel is highly resistant to corrosion and rust, making it suitable for use in harsh environments, including marine applications. Its corrosion resistance is a result of the chromium content, which forms a protective oxide layer on the surface of the bolt when exposed to oxygen or moisture.
Mechanical Properties: The "A4-70" designation indicates the bolt's mechanical properties. The "A4" signifies that it is a type of austenitic stainless steel, while the "70" represents its minimum tensile strength in megapascals (MPa). In this case, A4-70 stainless steel typically has a minimum tensile strength of 700 MPa.
Machining: A4-70 stainless steel can be machined, but it is generally more challenging to machine than some other materials due to its hardness. It may require specialized cutting tools and techniques to achieve precise results. However, it is important to note that stainless steel's corrosion resistance can be compromised if the material is overheated during machining.
|Specifications||ASTM A194 / ASME SA194|
|Size|| Cold Forming process: M2-M24
Hot Forging process: M24-M100, 1-1/2” Dia, up to 1100mm lg
CNC Machining for M100 / 4” Dia, up to 1500mm lg
Manufacturing M2, M3, M3.5, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M42, M45, M48 to M160 and Custom Metric Stainless Steel Hex Nuts
|Hex Nut Sizes Metric||Dia: M10 – M110 / Length: 12 – 1200MM|
|Hex Nuts Size Inch||Dia: 1/2″ – 4.0″ / Length: 1/2″ – 52″|
|Length||3 to 200 mm|
|Types||Heavy Hex Nuts, Large Heavy Hex Nuts, Heavy Hex Jam Nut, Heavy Hex Coupling Nut, Heavy Duty Hex Nuts|
|DIN Standard||DIN 934, DIN 982, DIN 985, DIN 936, DIN 929, DIN 1587, DIN 439, DIN 315|
|Dimensions||ASME B18.2.2 Heavy Hex Nuts, ASME B22.214.171.124M Metric Heavy Hex Nuts, ASME B18.16.6 / ASME B18.16.4 / ASME B18.2.2|
|Threads||METRIC, BSW, UNC, UNF, BSF or as required|
|Hex Nuts Forming||Hot Forged Hex Nuts & Cold Forged Hex Nuts|
|UTS – Unified Thread Standard||UNC, UNF, NPT, UNS, UNEF, NPTF|
Applications: A4-70 hex bolts find widespread use in various industries and applications, particularly where corrosion resistance and mechanical strength are critical. Some common applications include:
• Marine Industry: Due to its exceptional resistance to saltwater corrosion, A4-70 hex bolts are frequently used in boat building, ship maintenance, and other maritime applications. • Construction: They are used in construction projects, especially in outdoor and exposed areas where corrosion can be a concern, such as bridges, outdoor structures, and coastal developments. • Chemical Processing: A4-70 hex bolts are employed in chemical processing plants where exposure to corrosive chemicals is a constant threat. • Food and Pharmaceutical Industries: These bolts are used in equipment and machinery for their resistance to corrosion and ease of cleaning, which is crucial in these industries. • Outdoor Installations: A4-70 stainless steel hex bolts are ideal for outdoor installations like railings, fences, and signage, as they can withstand exposure to the elements without rusting or corroding.
To preserve the high standards of our selection of industrial hex nuts, 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 hex nuts.
|Steel Group||Steel Grade||Chemical composition|
|mass fraction, % (maxima unless stated))|
|Austenitic||A4||0.08||1||2||0.045||0.03||16 to 18.5||2 to 3||10 to 15||4|
|Steel Group||Steel Grade||Property Class||TensileStrengthRma min. Mpa||Stress at 0.2 % permanent strain Rp0.2a min. Mpa||Elongation after fracture Ab min. mm|
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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