Hindi kinakalawang na Walang hirap Pipe
Hardness:
Stainless steel tubes are commonly used to measure the hardness of Brinell, Rockwell and Vickers. Brinell hardness Among the hindi kinakalawang na asero pipe standards, Brinell hardness is the most widely used, and the hardness of the material is often expressed by the indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.
Rockwell tigas:
Ang hindi kinakalawang na asero tubo Rockwell tigas pagsubok ay ang parehong bilang ang Brinell tigas pagsubok. Ang pagkakaiba ay na ito ay sumusukat sa lalim ng indentation. Ang Rockwell tigas pagsubok ay isang malawak na ginagamit na pamamaraan na kung saan HRC ay ginagamit pangalawa lamang sa Brinell tigas HB sa mga pamantayan steel pipe. Rockwell tigas maaaring inilapat sa pagpapasiya ng mga materyales metal mula sa lubhang malambot na napakahirap. Ito compensates para sa Brinell paraan. Ito ay mas simple kaysa sa Brinell paraan at maaaring direkta basahin ang katigasan halaga mula sa dial sa katigasan machine. Gayunpaman, dahil sa kanyang maliit na indentation, ang tigas halaga ay hindi bilang tumpak hangga't ang Brinell paraan.
Vickers tigas
Ang hindi kinakalawang na asero tubo Vickers tigas pagsubok ay din ng isang indentation pagsubok na pamamaraan para sa pagsukat ng napaka-manipis na mga materyales metal at ibabaw layer tigas. Ito ay ang pangunahing bentahe ng Brinell at Rockwell pamamaraan, at overcomes ang kanilang mga pangunahing mga pagkukulang, ngunit ito ay hindi bilang simpleng bilang ang Rockwell paraan. Ang Vickers pamamaraan ay bihira na ginagamit sa mga pamantayan steel pipe.
Hardness test
The stainless steel tube has an inner diameter of 6.0mm or more and an annealed stainless steel tube with a wall thickness of 13mm or less. It can be a W-B75 type Vickers hardness tester. It is very fast and simple to test and is suitable for rapid and non-destructive inspection of hindi kinakalawang na asero pipes. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness greater than 1.2 mm are tested with a Rockwell hardness tester to test HRB and HRC hardness. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness of less than 1.2 mm are tested with a surface Rockwell hardness tester to test HRT or HRN hardness. For stainless steel pipes with an inner diameter of less than 0 mm and greater than 4.8 mm, the hardness of HR15T is tested by a special Rockwell hardness tester for pipes. When the inner diameter of the stainless steel tube is larger than 26 mm, the hardness of the inner wall of the tube can also be tested by a Ro
Komposisyong kemikal
| marka | C max | mn max | P max | S max | Si max | Cr | Ni | Mo |
| 304 | 0.08 | 2.00 | 0.04 | 0.03 | 0.075 | 18.00-20.00 | 8.00-11.00 | / |
| 304L | 0.035 | 2.00 | 0.04 | 0.03 | 0.075 | 18.00-20.00 | 8.00-13.00 | / |
| 316 | 0.08 | 2.00 | 0.04 | 0.03 | 0.075 | 16.00-18.00 | 11.00-14.00 | 2.00-3.00 |
| 316L | 0.035 | 2.00 | 0.04 | 0.03 | 0.075 | 16.00-18.00 | 10.00-15.00 | 2.00-3.00 |
Mechanical Katangian
| marka | Itemper | makunat Psi | yield Psi | elong% | Rockwell Hardness |
| 304 | annealed | 85000-105000 | 35,000-75,000 | 20-55 | 80-95 |
| 304L | annealed I1 / 8 Hard |
80000-105000 | 30,000-75,000 | 20-55 | 75-95 |
| 316 | annealed | 85000 min | 35000 min | 50 min | 80 min |
| annealed | 80000 min | 30000 min | 50 min | 75 min |
Laki ng hindi kinakalawang na asero Pipe
Annealed at adobo, maliwanag pagsusubo, makintab
paraan
