Kev ua haujlwm ntawm cov khoom lag luam yog nce raws txoj cai yooj yim thiab muaj peb pawg ntawm cov alphanumeric tsim:
F - Leading tsab ntawv qhia tau txog ferroalloys.
Theem pib. Qhov thib ob ntawm cov cai qhia txog lub ntsiab sib txuas, rau ferrosilicon nws yog c, ferromolybdenum mo, ferroniobium HB, thiab lwm yam.
Cov hmoov txhuas feem pua.
Hais txog qhov kawg taw tes, nws yuav tsum tau ntxiv tias cov naj npawb ntawm daim ntawv lo tsis qhia lub ntsiab lus ntawm lub ntsiab lus yooj yim. Piv txwv li, FS45 hom yog tus cwj pwm los ntawm cov silicon concentration ntawm 41-47%.
Tsis tas li ntawd, Gost 26590-85, uas muaj nyob rau ferrroalloys, tswj hwm tias kev kos cim ntawm kev sib txuas muaj cov ntsiab lus hauv qab no:
thauj chaws code;
Cov paib kev nyab xeeb;
Cov khoom lag luam tiag.
Thawj kis yuav tsum ua raws li cov cai ntawm Gost 14192 - 77. Hais txog kev ua tsis zoo ntawm qhov sib txuas, nws yuav tsum tau sau tseg tias raws li chav kawm phom sij, ferrroalloys muaj rau pawg thib peb, raws li Gost 12.1.007-76. Cov no yog cov tshuaj phem me me, qhov siab tshaj plaws ntawm cov uas nyob hauv huab cua yuav tsum tsis pub tshaj 10 mg ib lub cubic meter.
Ib qho kev ntsuas phom sij ntxiv yog qhov loj me. Piv txwv li, ferrosilicon leb tsawg dua 3.2 mm tau faib ua cov khoom txaus ntshai, nrog rau 315 mm, nrog rau cov cim npua, tsis txaus ntshai thaum thauj mus los.