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Views: 31 Author: Site Editor Publish Time: 2022-02-21 Origin: Site
Samhotak update new universal tensile testing machine to test bolt and nut,tensile strength and proof loading.
Kinsom can take control those following items in house:
Go/no go plug gauge test (all test tools are calibrated by professional third party every year)
Dimension
Proof load test
Torsional strength test
Rockwell hardness
Superficial rockwell hardness
Vickers hardness
Brinell hardness
Micro hardness
Salty spray Test
According to the GB/T 3098.1 for Screw,Stud, bolt ,GB/T3098-2 for Nut
Thread | A /mm² | Proof loading for Screw Bolt Stud Fp/N | |||||
Mechanical Properties Grade | |||||||
5.8 | 6.8 | 8.8 | 9.8 | 10.9 | 12.9 | ||
M3 | 5.03 | 2620 | 3020 | 4020 | 4530 | 5230 | 5140 |
M3.5 | 3.78 | 3530 | 4070 | 5420 | 6100 | 7050 | 8270 |
M4 | 8.78 | 4570 | 5270 | 7020 | 7900 | 9130 | 10700 |
M5 | 14.2 | 7380 | 8520 | 11350 | 12800 | 14800 | 17300 |
M6 | 20.1 | 10400 | 12100 | 16100 | 18100 | 20900 | 24500 |
M7 | 28.9 | 15000 | 17300 | 23100 | 26000 | 30100 | 35300 |
M8 | 36.6 | 19000 | 22000 | 29200 | 32900 | 38100 | 44600 |
M10 | 58 | 30200 | 34800 | 46400 | 52200 | 60300 | 70800 |
M12 | 84.3 | 43800 | 50600 | 67400 | 75900 | 87700 | 103000 |
M14 | 115 | 59800 | 69000 | 92000 | 104000 | 120000 | 140000 |
M16 | 157 | 81600 | 94000 | 125000 | 14100 | 163000 | 192000 |
M18 | 192 | 99800 | 115000 | 159000 | - | 200000 | 234000 |
M20 | 245 | 127000 | 147000 | 203000 | - | 255000 | 299000 |
M22 | 303 | 158000 | 182000 | 252000 | - | 315000 | 370000 |
M24 | 353 | 184000 | 212000 | 293000 | - | 367000 | 431000 |
M27 | 459 | 239000 | 275000 | 381000 | - | 477000 | 560000 |
M30 | 561 | 292000 | 337000 | 466000 | - | 583000 | 674000 |
Thread | P | Proof loading for Nut Fp/N | ||||
Mechanical Properties Grade | ||||||
5 | 6 | 8 | 10 | 12 | ||
M5 | 0.8 | 8250 | 9500 | 12140 | 14800 | 16300 |
M6 | 1 | 11700 | 13500 | 17200 | 20900 | 23100 |
M7 | 1 | 16800 | 19400 | 24700 | 30100 | 33200 |
M8 | 1.25 | 21600 | 24900 | 31800 | 38100 | 42500 |
M10 | 1.5 | 34200 | 39400 | 50500 | 60300 | 67300 |
M12 | 1.75 | 51400 | 59000 | 74200 | 88500 | 100300 |
M14 | 2 | 70200 | 80500 | 101200 | 120800 | 136900 |
M16 | 2 | 95800 | 109900 | 138200 | 164900 | 186800 |
M18 | 2.5 | 121000 | 138200 | 176600 | 203500 | 230400 |
M20 | 2.5 | 154400 | 176400 | 225400 | 259700 | 294000 |
