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304 stainless steel large semi-round head square neck carriage bolt for machine parts
Connection: Common Bolt
Head Style: round
Standard: DIN, ANSI, GB, BSW
The 304 stainless steel large semi-round head square neck carriage bolt is ideal for use in machine parts. Its high-quality material ensures durability and resistance to corrosion, making it a reliable choice for industrial applications. The semi-round head design allows for a smooth and flush finish, while the square neck provides added stability and security when fastening. This bolt is a versatile and essential component for assembling or repairing various machinery, offering strength and reliability in its performance. With its precise engineering and robust construction, this carriage bolt meets the demanding requirements of machine parts, ensuring efficient and long-lasting functionality.
Size = thread diameter de * pole length louis
The following specifications are manual measurements in a single batch, and
there is a certain error Unit: mm
304 stainless steel small head carriage screws GB12
| Size | dk/mm | k1/mm | S/mm | k/mm |
| M4 | 9.0 | 2.4 | 4.0 | 2.7 |
| M5 | 10.8 | 2.8 | 5.1 | 3.3 |
| M6 | 11.9 | 2.4 | 5.8 | 3.4 |
| M8 | 16.1 | 3.0 | 7.9 | 4.3 |
| M10 | 19.8 | 3.8 | 9.9 | 5.2 |
| M12 | 24.0 | 5.9 | 11.8 | 7.3 |
| chemical composition ，%,max | |||||||||||
| type | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | Mark | |
| 304-A2 | ≤ 0.07 | ≤ 1.0 | ≤ 2.0 | ≤ 0.035 | ≤ 0.03 | 17 19 | 8 11 | Processing hardening rate is moderate, suitable for general cold addition, working and pumping, cold processing performance is good, generally used in hexagonal screws, nuts and gasket products | |||
| 316-A4 | ≤ 0.08 | ≤ 1C | ≤ 2.0 | ≤ 0.035 | ≤ 0.03 | 17 19 | 18 2.5 | 11 14 | H | Molybdenum, corrosion resistance is stronger than 304, especially suitable for seawater and chemical media, more corrosion resistance value and hole corrosion resistance | |
| Note: 1) if the nickel content is less than 8%, the minimum content of manganese must be 5% 2) nickel content is greater than 8%, the minimum content of copper 3) chromium content is less than 17%, the minimum content of nickel is 12% 4) for the maximum carbon content of 0.03% austenitic stainless steel, nitrogen content up to 0.2 5) for products with large diameter, to achieve the specified mechanical properties, in the manufacturer specification, but for martensite steel shall not exceed 0.12% | |||||||||||
| mechanical behavior [character；property] | |||||||||||
| Type | Grade | Performance level | Screw diameter | tensile strength mpa/mmz | The non-column elongation shall be mpa/mm₂ | The elongation after breaking mpa/mm | |||||
| austenite | A2.A4 | 50 | ≤39 | 500 | 210 | 0.6d | |||||
| 70 | ≤24 | 700 | 450 | 0.4d | |||||||
| 80 | ≤24 | 800 | 600 | 0.3d | |||||||
| 你问我答 | |||||||||||
| Question 1 | 1. Why is stainless steel also magnetic?304 stainless steel belongs to austenitic stainless steel, austenite in the cold processing process has some or a small conversion into martensite, martensite is magnetic, so 304 stainless steel is no magnetic or micromagnetic. Specific can baidu query 304 stainless steel why contain magnetic property. | ||||||||||
| Question 2 | 2. How to identify the authentic 304 stainless steel products?① Support 304 stainless steel special testing medicine test, if do not change color for authentic 304 stainless steel.② Support for chemical composition analysis and spectral analysis.③ Support the salt spray test to simulate the actual use environment. | ||||||||||
| Question 3 | 3. What are the most commonly used stainless steel?① 201 stainless steel, suitable for use in a dry environment, when water is easy to water rust.② 304 stainless steel, outdoor or humid environment, corrosion resistance and strong acid resistance.③ 316 stainless steel, with molybdenum, more corrosion resistance and pore corrosion resistance, especially suitable for seawater and chemical media. | ||||||||||
| Since 2003, the world stainless steel raw materials rise, the domestic market appeared a kind of "low nickel" cheap economic stainless steel (containing nickel Ni1.5-4.5%) austenitic stainless steel, the price of 304 stainless steel lower about 45% -40%, corrosion, rust prevention ability is relatively low, Azhuo products are all austenitic 304 or 316 stainless steel products. | |||||||||||
standard
DIN603
Material
304 stainless steel
Rust resistance for use
Surface treatment whitening
Test
1. Size detection
2. Mechanical performance test
3. Corrosion resistance test
4. Thread quality inspection
5. Material composition analysis
6. Environmental adaptability test
7. Identification and packaging testing
8. Abrasion and fatigue test
9. Surface treatment quality inspection
10. Disassembly and reusability test
304 stainless steel small head carriage screws GB12
cable tray special 316 carriage screws M6*20
Flange nuts
Customization
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