20 yillik professional apparat ishlab chiqaruvchisi - JM Hardware
ASTM A490
2021-10-20
Bolt uchun standart | Baho | Bolt hajmi | Kuchlanish kuchi | Chidamlilik kuchi | Enlogatsiya | Qattiqlik | Boshni belgilash | |
ichida | ksi | ksi | % | Brinell | Rokvell C | |||
A490 | 1-tur | 1/2~1" | 150-173 | 130 daqiqa | 14 | <2*D, HB 311-352；>2*D, HB…-352; | <2*D, 33-39；>2*D, HC…-39; |
|
1~1-1/2" | 150-173 | 130 daqiqa | 14 | <3*D,HB313-352；>3*D,HB…-352 | <2*D, 33-39；>2*D, HC…-39; | |||
3-tur | ||||||||
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