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Stainless Steel Hexagon Socket Head Cap Screws / Hex Socket Head Cap Screws / Bolt M3 M4 M5

Stainless Steel Hexagon Socket Head Cap Screws / Hex Socket Head Cap Screws / Bolt M3 M4 M5
Product code: 47392700030
Unit price 0.8$
Sold quantity 77915
Available stock 960000

Product parameters:

  • Brand: BRT / Bai Ruite
  • Model: 304 hexagonal M3 series
  • Color classification: M3 * 5 (100) M3 * 6 (90) M3 * 8 (80) M3 * 10 (70) M3 * 12 (60) M3 * 16 (50) M3 * 20 (45 M * * (65 pcs) M * * (65) M4 * (65) M4 * ) M4 * 20 (40) M4 * 25 (35) M4 * 30 (30) M5 * 8 (40) M5 * 10 (35) M5 * 12 (30) M5 * 16 (25) M5 * 20 (20) M5 * 25 (20) M5 * 30 (18)
  • Product strength: 4.8 level
  • Head type: hexagon
  • Standard type: GB
  • Material: 304 stainless steel


At least 5 characters
Note: The following values ​​for a single batch of manual measurement, there is a certain error, mind or carefully contact customer service! Unit: mm
Nominal diameter
d
Thick pitch P Dk k s t
Min
Max Min Max Min Max Min
M1.4 0.3 2.74 2.46 1.4 1.26 1.36 1.32 0.6
M1.6 0.35 3.14 2.86 1.6 1.46 1.56 1.52 0.7
M2 0.4 3.98 3.62 2 1.86 1.56 1.52 1
M2.5 0.45 4.68 4.32 2.5 2.36 2.06 2.02 1.1
M3 0.5 5.68 5.32 3 2.86 2.58 2.52 1.3
M4 0.7 7.22 6.78 4 3.82 3.08 3.02 2
M5 0.8 8.72 8.28 5 4.82 4.095 4.02 2.5
M6 1 10.22 9.78 6 5.7 5.14 5.02 3
M8 1.25 13.27 12.73 8 7.64 6.14 6.02 4
M10 1.5 16.27 15.73 10 9.64 8.175 8.025 5
M12 1.75 18.27 17.73 12 11.57 10.18 10.025 6
M14 2 21.33 20.67 14 12.57 12.21 12.032 7
M16 2 24.33 23.67 16 15.57 14.21 14.032 8
M18 2.5 27.33 26.67 18 17.57 14.21 14.032 9
M20 2.5 30.33 19.67 20 19.48 17.23 17.05 10
M22 2.5 33.39 32.61 22 21.48 17.23 17.05 11
M24 3 36.36 35.61 24 23.48 19.28 19.065 12
M27 3 40.39 39.61 27 26.48 19.28 19.065 13.5
M30 3.5 45.39 44.61 30 29.48 22.28 22.065 15.6
At least 5 characters
Chemical composition,%, max
Group C Si Mn P S Cr Mo Ni Cu characteristic
304-A2 0.1 1 2 0.05 0.03 15-20 8-19 4

Excellent hardening rate, suitable for general cold processing and pumping, cold processing performance is better, generally used for hexagonal screws, nuts and washers products

316-A4 0.08 1 2 0.045 0.03 16-18.5 2-3 10-15 1

Plus molybdenum, corrosion resistance than 304 strong, especially for seawater and chemical media, more corrosion resistance and pitting resistance.

Note:

1) If the nickel content is less than 8%, the minimum content of manganese must be 5%
2) When the nickel content is more than 8%, the minimum content of copper is not limited
3) If the 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 0.22
5) For larger diameter products, in order to achieve the required mechanical properties, in the manufacturer's instructions, there may be a higher carbon content, but the martensitic steel should not exceed 0.12%



Mechanical behavior
category Group Performance level Screw diameter Tensile strength mpa / mm2 Specifies that the non-column extension should be mpa / mm2 After breaking the amount of elongation mpa / mm2
Austenite A2, A4 50

≤ 39

500 210 0.6d
70

≤ 24

700 450 0.4d
80

≤ 24

800 600 0.3d
Question 1

1. Why does stainless steel bring magnetic

304 stainless steel is austenitic stainless steel, austenite in the cold process of some or a small amount into martensite
, Martensite is a magnetic, so 304 stainless steel is non-magnetic or micro-magnetic. Specific can be related to whether the magnetic content of 304 stainless steel.

Question 2

2. How to identify authentic 304 stainless steel products?

① support 304 stainless steel detection syrup detection, if not change color for the authentic 304 stainless steel.


② support chemical composition analysis spectral analysis.

③ support smoke test, simulate the actual use of the environment.

Question 3

3. What is the most commonly used stainless steel?

①.201 stainless steel, suitable for use in a dry environment, water is easy to rust.
② 304 stainless steel, outdoor or humid environment, corrosion resistance and strong acid resistance.
③ 316 stainless steel, plus molybdenum, more corrosion resistance and resistance to corrosion, especially for seawater and chemical media.

Since 2003, the world's stainless steel raw materials rose, the domestic market there is a class of 'low nickel' cheap economy stainless steel (nickel Ni1.5-4.5%) austenitic stainless steel, the price is lower than the 304 stainless steel 15% -40 %, Anti-corrosion anti-rust ability is relatively low, Bai Ruite products are all austenitic 304 or 316 stainless steel products.