Hardness testing to ISO 6508-1
Stainless Steel Grade A4-70 Fasteners are hardware components made from a specific grade of stainless steel known as A4-70. This grade is also referred to as AISI 316 or 18/8/3 stainless steel, and it is an austenitic stainless steel with higher corrosion resistance than the A2-70 grade. The chemical composition of Stainless Steel Grade A4-70 typically includes 16-18% chromium, 10-14% nickel, 2-3% molybdenum, 1% max manganese, 1% max silicon, 0.07% max carbon, and small amounts of other elements like sulfur, phosphorus, and nitrogen.
One of the key features of Stainless Steel Grade A4-70 Fasteners is their excellent corrosion resistance. The higher molybdenum content in the alloy enhances its resistance to corrosive environments, including chloride-induced corrosion. This makes them suitable for applications in marine and coastal environments, as well as in chemical processing plants where exposure to corrosive chemicals is common.
Stainless Steel Grade A4-70 Fasteners also offer good mechanical properties, including moderate tensile strength and excellent ductility. This combination of properties makes them easy to form, fabricate, and install, providing reliability and ease of use in various applications.
Due to their superior corrosion resistance, Stainless Steel Grade A4-70 Fasteners find extensive use in marine and offshore industries. They are commonly used in shipbuilding, offshore platforms, and seawater-cooled systems, where exposure to corrosive seawater is significant. Additionally, they are employed in chemical processing plants, desalination facilities, and other applications that require resistance to corrosive chemicals and high-temperature stability.
|ASTM A193 / ASME SA 193
|DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
|M3 to M90
|10mm to 1000mm
|DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
|UNF, BSW, BSF, METRIC, UNC, or as required
|ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
|Hex, Threading, Square, Round as per Gauge Etc.
|Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
|Hex, Square, Triangular, Oval & Knurled etc.
|Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request
|Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing.
Stainless steel A4-70 FASTENERS fasteners are widely used in many applications that require high durability, strength, and corrosion resistance. These materials offer a range of advantages that make them ideal for various industries, including construction, food processing, and chemical processing.
To preserve the high standards of our selection of industrial fasteners, 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 fasteners.
|16 to 18.5
|2 to 3
|10 to 15
|Tensile Strength min. Mpa
|Stress at 0.2 % permanent strain Rp0.2a min. Mpa
|Elong (% in 4D min)
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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