80 pieces M4*8 mm 304 Stainless Steel Inner Hex socket Countersunk Flat Cap Cup Head Screws Bolt DIN7991 Standard | Обустройство дома

BrandBRT / Bai RuiteMaterial304 stainless steelnameHexagon socket head cap screwsSurface treatmentUntreatedstandardDIN7991package instructionPlastic bags / cartonssizeFor example: M6 * 30 (thread diameter 6mm thread length 30mm) with head lengthHexagon socket head cap screws304 stainless steel bolt series201 stainless steel boltsClass 12.9 bolts4.8 carbon steel bolts

Note: The value of a single batch of manual measurement, there is a certain error, please prevail in kind, mind careful shot or contact customer service!Unit: mmNominal diameterM2M2.5M3M4M5M6M8M10M12M16M20Pitch0.40.450.50.70.811.251.51.7522.5DkMax456810121620twenty four3036Min3.64.75.77.649.6411.5715.5719.4823.4829.4835.38Lt; / RTI & gt;Nominal--22.5345681012Max--2.12.63.14.125.146.146.17510.17512.212Min--2.022.523.024.025.026.028.02510.02512.032Lt; / RTI & gt;Max--1.21.82.32.53.54.44.65.35.9Min--0.951.552.052.253.24.14.355.6K≈1.92.52.53.44.14.96.27.69.610.611.4

 

Chemical composition,%, maxGroupCSiMnGt;Lt; / RTI & gt;CrMoNiCucharacteristic304-A20.1120.050.0315-20 8-194

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-A40.08120.0450.0316-18.52-310-151

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 behaviorcategoryGroupPerformance levelScrew diameterTensile strength mpa / mm2The specified non-proportional elongation shall be mpa / mm2Elongation after breaking mpa / mm2AusteniteA2, A450

Lt;

5002100.6d70

Lt;

7004500.4d80

Lt;

8006000.3d'