Спасибо, успокоил, а то переживал, хотелость чуть поднять кубатуру, а тут о упрочнении услышал.
Если кому интересно о заводе вот, тут пытаюсь расковырять инфо.
http://www.lasleeve.com/technical L.A.SLEEVE manufactures our cylinder sleeves from a centrifugally spun cast iron alloy of carbon-chrome and molybdenum. The MOLY 2000 iron alloy material features many of the same alloys that are used in todays plated aluminum cylinders. Unlike plated aluminum bores, sleeves are boreable.
These centrifugally spun cast sleeves feature a high tensile stength of 48,000 psi to 53,000 psi which insures ease of installation, trouble free boring or machining.
L.A.SLEEVE also manufactures ductile iron sleeves and spun cast aluminum sleeves.