GB56304 stainless steel extension and thickening nut, agon connection nut, connection nut M5-M8 5PCS

brandBRT/ barrettMaterial304 stainle steelName-joint nutSurface treatmentUntreatedstandardGbPackage descriptionPlastic bags/cartonssizeFor example: (inner diameter 3mm)

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The presence of positive and negative tolerances is particularly concerned, dimensions: inner diameter, agonal-to-edge, length Setting: mmSpecificationsInner diameter DOpposite edge SLength LM5*8*155815M5*8*205820M6*10*2561025M6*10*3061030M6*10*4061040M8*13*4081340M10*17*35101735M10*17*40101740M10*17*45101745

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Chemical composition, %,maxConstituenciesCSiMnPSCrMoNiCuCharacteristics304-A20.1120.0.0315-208-194

Medium work hardening rate, suitable for general cold proceing and stretching, cold proceing performance is good, commonly used for external agonal screw, nut and gasket products.

316-A40.08120.04.0316-18.52-310-151

Adding molybdenum, the corrosion resistance is better than 304. It is especially suitable for seawater and chemical media, and has better corrosion resistance and pitting resistance.

Note:

1) If the nickel content is le than 8%, the minimum content of manganese must be 5%2) When the nickel content is more than 8%, there is no limit on the minimum copper content.3) If the chromium content is le than 17%, the minimum nickel content is 12%.4) For austenitic stainle steel with a maximum carbon content of 0.03%, the nitrogen content can be as high as 0.225) For products with larger diameters, in order to achieve the specified mechanical properties, there may be a higher carbon content in the manufacturer's specification, but not more than 0.12% for Masi steel

Mechanical propertiesCategorygroupPerformance gradeScrew diameterTensile strength mpa/mm2The specified non-specific column elongation shall be MPa/mm.2Post-break elongation mpa/mm2austeniteA2,A4

≤ 39

02100.6d70

≤ 24

70040.4d80

≤ 24

8006000.3d

Question 11. Why is stainle steel ic?

304 stainle steel belongs to austenitic stainle steel. Austenite transforms into martensite partly or slightly during cold working. Martensite is ic, so 304 stainle steel is non-ic or micro-ic. Bu can specifically inquire why 304 stainle steel contains ism.

Question 22. How to identify authentic 304 stainle steel products?

①支持304不锈钢专用检测药水检测,如果不变色为正宗304不锈钢.② support chemical composition analysis and spectral analysis.(3) Support testing, simulation of the actual use of the environment.

Question 3What kinds of stainle steel are most commonly used?

(1) 201 stainle steel, suitable for use in a dry environment, easy to rust with water.(2)304 stainle steel, outdoor or humid environment, corrosion resistance to strong acidity.③316 stainle steel, with molybdenum added, has better corrosion resistance and hole corrosion resistance, especially suitable for seawater and chemical media.

Since 2003, stainle steel raw materials have risen all over the world. A kind of "low nickel" low-cost economical stainle steel (containing nickel and Ni1.5-4.5%) austenitic stainle steel has appeared in the domestic market. Its price is about 15%-40% lower than that of 304 stainle steel. Its anti-corrosion and anti-rust ability is relatively low. Barrett products are all austenitic 304 or 316 stainle steel products.