Tsis yog- sib nqus laum dab tshos yog ua los ntawm qis- carbon, siab -chromium-manganese alloy steel. Lawv yog refined los ntawm ib tug nruj tshuaj muaj pes tsawg leeg piv thiab forged mus cuag lawv txhua yam khoom, uas ua rau zoo heev tsis tshua muaj magnetic permeability, siab zog, zoo heev intergranular corrosion cracking kuj, thiab superior hnav tsis kam. Thaum lub zog magnetic teb yog 1 × 10⁵ / 4π A / m, tus txheeb ze sib nqus permeability μr ntawm qhov tsis yog -magnetic laum dab tshos Tsawg dua lossis sib npaug rau 1.010.
Qhov sib nqus flux density gradient nyob rau hauv lub puab qhov ntawm qhov tsis yog - sib nqus laum dab tshos ntawm qhov deb ntawm 100 mm yog tsawg dua los yog sib npaug rau 0.05 μT.
