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.

Stainless Steel A4-70 Hex Nut, A4-70 Stainless Steel Hex Nuts, SS A4-70 Hex Nuts, Stainless Steel A4-70 Heavy Hex Nut, A4 70 Stainless Steel Hex Nut Dimensions, SS A4-70 Hex Nuts Manufacturers in India.

Stainless Steel A4-70 Hex Nuts
  • Grade


  • ASTM


  • ASME



SS A4-70 Heavy Duty Hexagon Nuts, Stainless Steel A4-70 Hex Flange Nut, ASTM A194 A4-70 Stainless Steel Hex Nuts, Stainless Steel A4 70 Hex Coupling Nuts, Stainless Steel A4-70 Hex Jam Nuts, ASME B18.2.2 A4-70 Heavy Hex Nuts, SS A4-70 Hexagonal Nut.

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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fevicon-logo SS A4-70 Hex Nuts Specification

SpecificationsASTM 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
Diameter1/4 "-4" Metric:M3 to M100
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
DimensionsASME B18.2.2 Heavy Hex Nuts, ASME B18.2.4.6M Metric Heavy Hex Nuts, ASME B18.16.6 / ASME B18.16.4 / ASME B18.2.2
ThreadsMETRIC, BSW, UNC, UNF, BSF or as required
Hex Nuts FormingHot Forged Hex Nuts & Cold Forged Hex Nuts
UTS – Unified Thread StandardUNC, 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.

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fevicon-logo Chemical Composition of Stainless Steel A4-70 Hex Nuts

Steel Group Steel Grade Chemical composition
mass fraction, % (maxima unless stated))
C Si Mn P S Cr Mo Ni Cu
Austenitic A4 0.08 1 2 0.045 0.03 16 to 18.5 2 to 3 10 to 15 4

fevicon-logo Mechanical Properties of SS A4-70 Hex Nuts

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
Austenitic A4 80 800 450 0.4d

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fevicon-logo Types of Stainless Steel A4-70 Hex Nuts

Hex Nuts

SS A4-70 Hex Nuts

Heavy Hex Nuts

SS A4-70 Heavy Hex Nuts

Hex Weld Nuts

SS A4-70 Hex Weld Nuts

Hex Flange Nut

SS A4-70 Hex Flange Nut

Hex Coupling Nut

SS A4-70 Hex Coupling Nut

Hex Jam Nut

A4-70 SS Hex Jam Nut

Slotted Hex Nuts

SS A4-70 Slotted Hex Nuts

Hex Nylock Nuts

SS A4-70 Hex Nylock Nuts

Hex Nuts Manufacturers In India

  • 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

fevicon-logo Other Types Of Stainless Steel A4-70 Hex Nuts

A4-70 SS Hex Nuts Manufacturer in Mumbai A4 70 Stainless Steel Hexagon Dome Nuts
A4-70 Stainless Steel Slotted Hex Nuts Stainless Steel A4-70 Hex Nuts Stockist in Mumbai
SS A4-70 Hex Nuts Manufacturer in India Best Stainless Steel A4-70 Hex Nuts
SS A4 70 Hex Nuts Supplier in Mumbai A4-70 Stainless Steel Hex Nuts Manufacturer
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fevicon-logo Stainless Steel A4-70 Hex Nuts Application Industries

Aerospace Industry
Nuclear Industry
MEdical Industry
Marine Industry
Mining Industry
Automotive Industry
Construction Industry
Manufacturing Industry
Nut Bolt