Stainless Steel A4-70 Hex Bolt

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.

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• ISO

  3506-1

• Grade

  A4-70

• ASTM / ASME

  ASTM A193 / SA193

• SHARE

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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.

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SS A4-70 Hex Bolts Specification

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.

Chemical Composition of Stainless Steel A4-70 Hex Bolts

Mechanical Properties of SS A4-70 Hex Bolts

Types of Stainless Steel A4-70 Hex Bolts