Feem ntau cov qauv hlau hauv Japanese steel (JIS series) qib feem ntau muaj peb ntu:
Thawj ntu sawv cev rau cov khoom siv, xws li: S (Steel) sawv cev rau hlau, F (Ferrum) sawv cev hlau;
Qhov thib ob sawv cev rau cov duab sib txawv, hom, thiab siv,
Piv txwv li: P (Plate) txhais tau tias phaj, T (Tube) txhais tau tias raj, K (Kogu) txhais tau tias cuab yeej;
Qhov thib peb sawv cev rau tus yam ntxwv tus lej, feem ntau yog qhov tsawg kawg nkaus tensile lub zog.
Piv txwv li: SS 400 - thawj S sawv cev rau cov hlau, qhov thib ob S sawv cev rau "cov qauv", 400 yog qhov qis zog tensile zog ntawm 400MPa, thiab tag nrho sawv cev rau cov qauv zoo tib yam steel nrog lub zog tensile ntawm 400MPa.
SPHC - Thawj S yog cov ntawv luv ntawm Hlau, P yog cov ntawv luv ntawm Phaj, H yog cov ntawv luv ntawm Kub, thiab C yog cov ntawv luv ntawm Kev Lag Luam. Tag nrho cov sawv cev feem ntau yog siv cov hlau kub dov thiab steel strips.
SPHD-- sawv cev kub dov steel phaj thiab strips rau stamping.
SPHE-- sawv cev rau cov ntawv kub dov steel thiab strips rau kev kos duab sib sib zog nqus.
SPCC- sawv cev feem ntau sivtxias dov carbon steel ntawvthiab strips, sib npaug rau Tuam Tshoj Q195-215A qib. Qhov thib peb tsab ntawv C yog lub ntsiab lus ntawm Txias. Thaum nws tsim nyog los xyuas kom meej qhov ntsuas tensile, ntxiv T thaum kawg ntawm qib los qhia SPCT.
SPCD - sawv cev rau cov ntawv txias-kuav los tiag carbon steel ntawv thiab strips rau stamping, sib npaug rau Tuam Tshoj tus 08AL (13237) zoo carbon structural steel.
SPCE- sawv cev rau cov ntawv txias-dov cov pa roj carbon steel thiab strips rau kev sib sib zog nqus nqus, sib npaug rau Tuam Tshoj tus 08AL (5213) sib sib zog nqus nqus hlau. Thaum tsis ua raws sijhawm yuav tsum tau ua kom ntseeg tau, ntxiv N mus rau qhov kawg ntawm qib los qhia SPCEN.
quenching thiab tempering lis dej num ntawm txias-dov carbon steel nplooj ntawv thiab steel strips: annealed lub xeev yog A, txheem quenching thiab tempering yog S, 1/8 hardness yog 8, 1/4 hardness yog 4, 1/2 hardness yog 2, thiab hardness yog 1.
Cov txheej txheem deg: D rau matte tiav dov thiab B rau ci tiav dov. Piv txwv li, SPCC-SD sawv cev rau cov txheej txheem quenched thiab tempered, matte tiav dov, feem ntau yog siv cov ntawv txias-dov carbon. Lwm qhov piv txwv yog SPCCT-SB, uas sawv cev rau cov ntawv txias-dov cov pa roj carbon monoxide nrog cov txheej txheem tempering thiab ci ua haujlwm, yuav tsum tau lav cov khoom siv kho tshuab.
JIS mechanical structure steel qib qhia txoj kev yog: S + carbon cov ntsiab lus + tsab ntawv code (C, CK), uas cov ntsiab lus carbon tau qhia los ntawm tus nqi nruab nrab × 100. Tsab ntawv C: sawv cev rau carbon. K: sawv cev rau carburizing steel. Piv txwv li, cov ntsiab lus ntawm cov pa roj carbon rolled phaj S20C yog 0.18-0.23%.