Qulqulka alkoy waa boqolkiiba sare ee walxaha tuubbada tuubbada sida molybdenum (Mo), Chromium (CROMEL), nikkel, iwm. Xaqiiqdii, ASTM A335 wuxuu daboolayaa "hoose ee tuubooyinka birta, taasi waa, oo leh wax ka yar 5% wadarta guud ee walxaha ka kooban. Ku darista boqolkiiba sareeya ee walxaha ka kooban sida nikkel iyo chromium-ka waxay u beddelaan birta akoontiga sare sida birta saqafka leh, ilaa agabyada waaweyn ee saliida leh sida in lagu farxo, deg degga, monel, iwm.
A182 oo ku habboon
Alloy 20 (Alloy 20) waa allo aunalnitic oo ku saleysan birta oo la sameeyay si looga hortago daxanka acid ee sulfuric acid. Waxay leedahay iska caabin aad u wanaagsan oo ah xarkaha acid ee sulfuric acid; Waxay leedahay iska caabbinta adag ee aashitada fosfooraska, nitric acid iyo jawiga chlorided, chloride walwalka carbiska, xidhashada-goynta iyo jajabinta. Sidaa darteed, Alloy 20 waxay leedahay magaca anti-suulyo alloy; Waxay leedahay codsiyo fara badan oo kala duwan: sida: kiimikada, cuntada, dawada, soosaarka korantada iyo warshadaha balaastigga ayaa isticmaali doona. Wixii caabbinta ah ee iska caabbinta tuubbada iyo jiirka chloride, dhibaatooyinka is-afgaradka culeyska, iwm., Alkoy 20 ayaa badanaa la isticmaalaa.