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 description:

Product parameters:

  • Brand: BRT / Bai Reiter
  • Model: 304 hexagonal M3 series
  • Color Classification: M3 * 5 (100) M3 * 6 (90) M3 * 8 (80) M3 * 10 (70) M3 * 12 (60) M3 * 16 M4 * 8 (65) M4 * 10 (55) M4 * 12 (50 pcs) M4 * 16 (45 pcs) M5 * 16 (25 pcs) M5 * 10 (35 pcs) M5 * 12 (30 pcs) M5 * 16 (25 pcs) M4 * M5 * 20 (20) M5 * 25 (20) M5 * 30 (18)
  • Product strength: 4.8
  • Head type: within the hexagonal
  • Standard types: GB
  • Material: 304 stainless steel


Minimum 5 characters
Note: The following values ​​for the single-batch manual measurement, there is a certain error, mind careful shot or contact customer service! Unit: mm
Nominal diameter
d
Coarse pitch P Dk k s t
Lt; / RTI & gt;
Max Lt; / RTI & gt; Max Lt; / RTI & gt; Max Lt; / RTI & gt;
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
Minimum 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

Work hardening rate is moderate, suitable for general cold processing and stretching, cold processing performance is better, generally used for hexagonal screws, nuts and gasket 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%, then the minimum nickel content of 12%
4) For the maximum 0.03% carbon content of austenitic stainless steel, nitrogen content of up to 0.22
5) For larger diameter products, in order to achieve the specified mechanical properties in the manufacturer's instructions, may have a higher carbon content, but martensitic steel should not exceed 0.12%



Mechanical behavior
category Group Performance level Screw diameter Tensile strength mpa / mm2 The specified non-proportional elongation shall be mpa / mm2 Elongation after breaking 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 stainless steel with magnetic?

304 stainless steel is austenitic stainless steel, austenite in the cold part of the process or a small amount into martensite
, Martensite is magnetic, so the 304 stainless steel is non-magnetic or micro-magnetic. Baidu query can be specific why 304 stainless steel with magnetic.

Problem 2

2. How to identify genuine 304 stainless steel products?

① support for testing 304 stainless steel syrup detection, if not discolored to authentic 304 stainless steel.


② support the chemical composition analysis of spectral analysis.

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

Problem 3

3. The most commonly used stainless steel that several?

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

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