Feem ntau siv steel phaj cov ntaub ntawv: SPCC (txias dov phaj), SPHC (kub dov phaj), SECC (electro-galvanized phaj), SGCC (kub-dip galvanized phaj), SPTE (tin-plated steel phaj, feem ntau hu ua tinplate).
Common Japanese hom nyob rau hauv dav dav thiab mechanical structural steel daim hlau:
1. Ordinary structural steel 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, xws li P (Plate) rau phaj, T (Tube) rau raj, K (Kogu) rau cov cuab yeej, U - lub hom phiaj tshwj xeeb, W - hlau, hlau, C - casting, F -Forgings;
Qhov thib peb siv cov lej los qhia tus lej xov tooj lossis qhov qis dua ntawm cov nqi zog ntawm cov khoom siv hlau lossis cov khoom steel. Qee lub npe tseem muaj cov lus xaus xws li A, B, C thiab lwm cov tsiaj ntawv ntxiv rau tus lej xov tooj los qhia cov qib zoo sib txawv, hom lossis tuab. 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.
Tom qab cov qauv tseem ceeb ntawm qib (thawj, thib ob thiab thib peb), cov cim tom qab ntawm cov hlau zoo, kev tsim qauv thiab kev kho cua sov tuaj yeem ntxiv raws li xav tau.
2. Nqe lus piav qhia ntawm lub ntsiab hom:
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 rau feem ntau siv cov ntawv txias-kuav los tiag carbon steel ntawv thiab strips, sib npaug rau Tuam Tshoj Q195-215 qib A. 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 los xij 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. Nto ua code: 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.
