What does A4-70 mean on a bolt?
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.
Is A4-70 high tensile?
The A4-70 grade has 700MPa tensile strength and A4-80 has 800MPa minimum tensile strength….
| Product name | A4-70 Stainless Steel Bolts |
|---|---|
| DIN Standard | B.S. DIN933 DIN931 DIN934 DIN912 DIN603 DIN6923 |
| Surface treatment | Passivation /plain |
Is A2 70 the same as 304?
Therefore, A2-70 is an austenitic, acid proof stainless grade (usually 304 material – 304 or 304L) which has been cold worked to provide a minimum tensile strength of 700N/mm² (MPa).
What is an A4 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.
Is A4 stronger than A2?
A2 vs A4 stainless steel strength Whereas grade A4 is stronger than grade A2, and its tensile properties are almost similar to alloy steel grade 8.8.
What does A4 80 mean?
The “80” denotes the minimum tensile strength to be met by the material (actually the bolt, screw or nut after manufacture). Therefore, A4-80 is an austenitic, acid proof stainless grade (usually 316 material – 316 or 316L) which has been cold worked to provide a minimum tensile strength of 800N/mm² (MPa).
What is difference between A2 and A4 stainless steel?
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 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.