What metal is A4 70?
A4 70 Bolt is made up of 316 or 316L austenitic stainless steel grades. The A in the name indicates that the fasteners are made up of a cold worked austenitic stainless steel.
What is A4 in bolt?
A4 stainless steel fasteners are typically known as marine grade stainless fasteners due to their resistance to salt water corrosion and can be found in a number of water-based applications. It is also resistant to salt spray.
What is the difference between A4 70 and A4 80?
What does the 70 or 80 in a stainless steel bolt head mean? The 70 or 80 refers to the tensile strength of the bolt; this is the maximum stretching force it can withstand before breaking. The class 80 bolt is stronger than the class 70. Class 70 is the most commonly used type of fastener.
What is Grade A4 stainless steel?
A4 stainless steel is known as a marine grade of stainless steel. This grade of steel has a slightly higher chrome and molybdenum content than A2 stainless steel, which gives it increased resistance in harsh chemical and outdoor environments.
What does A4 70 mean?
The “70” denotes the minimum tensile strength to be met by the material (actually the bolt, screw or nut after manufacture). Therefore, A4-70 is an austenitic, acid proof stainless grade (usually 316 material – 316 or 316L) which has been cold worked to provide a nimimum tensile strength of 700N/mm² (MPa).
What is the difference between A2-70 and A4 70?
The material composition is the primary difference that makes difference in the mechanical properties and other aspects of these materials. The a4 material has 16% chromium, 2% molybdenum and 10.5% nickel in the composition. The a2 material has 10.5% chromium in the composition.
What is better A2 or A4 stainless?
A4 stainless is often used in marine or chemical environments as it has greater corrosion resistance than A2. The chemical composition of both A2 and A4 stainless steel are almost identical with the most notable differences being the higher nickel content and the addition of Molybdenum in A4.
What grade is an A2-70 bolt?
The most common stainless steel grade, comparable in strength to grade 2 materials, yet slightly weaker and easy to weld. The DIN/ISO denotation for an extremely similar grade is A2-70.
What is material A4?
A4 Stainless is often referred to as 316 or 18/10 stainless. As in A2 above, the numbers 18/10 refer to the chromium and nickel content- 18% chromium and 10% nickel.