Vision alloy is one of the most astonishing manufacturers, suppliers, and stockists of stainless steel products. These products are highly efficient for industrial, commercial, and household uses. A4-70 stainless steel bolts are highly ductile and strong. We manufacture these bolts using high-quality metals and raw materials. These bolts are highly durable and highly tested. We at Vision Alloy manufacture and supply these products by taking all the safety precautions.
A4-70 stainless steel bolts are made of austenitic steel and high-quality elements. These elements are manufactured by using a high-quality combination that includes 18% chromium, 3% molybdenum, and 8% of nickel. The high quantity of elements like chromium, nickel, and molybdenum provides great ductility and strength to the grade.
A4-70 stainless steel bolts are commonly used for joining or holding two or more objects or materials together. These stainless steel bolts are very stable in nature. They have excellent malleability and robustness. These bolts support welding, pitting, and annealing. A in A4-70 stainless steel bolts stands for austenitic steel. Austenitic steel is very sturdy and durable. Elements like molybdenum, nickel, and chromium provide high resistance from corrosion, crevice corrosion, and stress cracking. A4-70 stainless steel bolts are capable of taking heat up to 870°C.
A4-70 also has high tensile and yield strength which is one of the main features of this grade. A4-70 also includes elements like phosphorus, silicon, sulfur, and manganese.
We at Vision Alloy make sure that the grade is thoroughly tested and certified before getting dispatched. We also use multiple testing methods on grade in order to state the quality of the product.
| Product name | Stainless Steel A4-70 Bolts |
|---|---|
| Place of Origin | India |
| Standard | ISO 4017, DIN931, GB5783, DIN, ASTM, ANSI, JIS, EN, AS |
| DIN Standard | B.S. DIN933 DIN931 DIN934 DIN912 DIN603 DIN6923 |
|
Passivation /plain |
| Stainless Steel A4-70 Hex Bolts Size | M2 – M100 |
| Stainless Steel A4-70 Hex Bolts Diameter | M3-M60 |
| Stainless Steel A4-70 Hex Bolts Length | 6mm-500mm |
| Head | Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc |
| Neck type | Hex, Square, Triangular, Oval & Knurled etc |
| Drive type | Phil, Slotted, Hex socket, Torx & square slot etc |
| Stainless Steel A4-70 Hex Bolts Application | Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry |
| Dimensions | ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded. |
| Drive Style | Type I |
| Stainless Steel A4-70 Hex Bolts Material | 18-8 Stainless Steel, stainless steel ss 304/ SS316 A2/A4, SS201, SS303, SS304, SS316, SS316L, SS904L, A2-70; A4-70; A4-80 |
| Thread Requirements | ASME B1.1, UNC & UNF, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge) |
| Finish | Per ASTM A380/A380M |
| Finishing | Zinc Plated (Yellow, White, Blue, Black), Hop Dip Galvanized (HDG) phosphorization, Black Oxide, Geomet, Dacroment, anodization, Nickel plated, Zinc-Nickel plated, Brass Plated, Tin Plated, Black Plated, Copper Plated, Gold Plated, Salt fog test |
| Stock Products | Stainless steel: All DIN, GB Standard and part ASNI standard stainless steel A4-70 Hex Bolts, A4-70 Hex: ISO7380, DIN7981, DIN7982, DIN916, DIN913, DIN7985, DIN912 |
| Production technology | Cold Forged |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing |
| MOQ | 10 pieces |
| Delivery time | Regular product is about 7-15 days, custom product will according to special requirement |
| Others | OEM, ODM, ±0.03MM tolerance |
| Surface treatment of stainless steel A4-70 Hex Bolts |
|
| Coatings | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Tolerance of stainless steel A4-70 Hex Bolts | +/-0.01mm to +/-0.05mm |
| Samples | Yes |
| Production Capacity | 2,700,000 pieces per month |
For Bolts & Screws: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H
For Nuts: A2-70, A2-80, A4-70, A4-80, F594C, F594D, F594G, F594H, A2-035, A4-040
For SHCS: F837B, F837C, F837E, F837
For Threaded Rods: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H, B8, B8M CL1 & CL2
Chemical Composition
Typical compositional ranges for grade A4-70 Stainless Steel Bolt
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A4-70 | Min | – | – | – | – | – | 16.0 | 2.0 | 10.5 | – | – |
| ISO | Max | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 18.5 | 3.0 | 14.0 | 1.0 | – |
| A4-70 | Min | – | – | – | – | – | 16.0 | 2.0 | 11.5 | – | 0.12 |
| ISO² | Max | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 18.5 | 3.0 | 14.0 | 1.0 | 0.22 |
Mechanical Properties
Typical mechanical properties for grade A4-70 Stainless Steel Bolt
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min |
Elong (% in 50mm) min |
Hardness Rockwell B (HR B) max |
Brinell (HB) max |
|---|---|---|---|---|---|
| A4-70 | 700 | 450 | 40 | Not required | Not required |
Physical Properties
Typical physical properties for annealed grade A4-70 Stainless Steel Bolt
| Grade | Density (kg/m³) |
Elastic Modulus (GPa) | Mean Co-eff of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100 °C (J/kg.K) |
Elec Resistivity (nΩ.m) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
||||||||||
| A4-70 | 8000 | 193 |
|
|
500 | 740 |
