Japanese Steel Qib Qhia Txoj Kev Thiab Lub Ntsiab Lus

Common structural steel in Japanese steel (JIS series) grades mainly consists of three parts: the first part (indicating material: S〈Steel〉steel, F〈Ferrum〉iron) + the second part (indicating shape, type, use: P〈 Plate>sawv cev rau phaj, T〈Tube 〉 sawv cev lub raj, K〈Kogu〉 sawv cev rau cov cuab yeej, S〈Structure〉 sawv cev rau cov qauv) + thib peb (sawv cev tus yam ntxwv, feem ntau lub zog tensile qis tshaj) xws li:

1) SS 400 - thawj S sawv cev rau cov hlau, qhov thib ob S sawv cev rau cov qauv, 400 sawv cev rau qis zog tensile zog ntawm 400MPa, thiab tag nrho sawv cev rau cov qauv zoo tib yam steel nrog lub zog tensile ntawm 400MPa.
2) SPHC - thawj S sawv cev rau hlau, qhov thib ob P sawv cev rau Phaj, qhov thib peb H sawv cev rau tshav kub, plaub C sawv cev rau Kev Lag Luam, thiab tag nrho cov sawv cev feem ntau yog cua sov. Rolled steel daim hlau thiab strips.
3) SPHD - thawj S sawv cev rau Hlau, qhov thib ob P yog rau Phaj, qhov thib peb H sawv rau tshav kub, plaub D yog rau kos duab, thiab tag nrho sawv cev rau stamping. Kub dov steel phaj thiab strips.

JIS G3444 LSAW Pipe
4) SPHE - thawj S sawv cev rau hlau, qhov thib ob P sawv cev rau phaj, qhov thib peb H sawv cev rau qhov kub, plaub E sawv cev rau qhov sib sib zog nqus nqus, thiab tag nrho sawv cev kub dov rau kev sib sib zog nqus nqus. Hlau daim hlau thiab steel strips.
5) SPCC - thawj S sawv cev rau Hlau, qhov thib ob P sawv rau Phaj, thib peb C sawv rau Txias, thiab plaub C sawv rau Kev Lag Luam. Cov lus qhia dav dav yog txias. Rolled carbon steel ntawv thiab strips, sib npaug rau Tuam Tshoj Q195-215A qib. Thaum nws tsim nyog los xyuas kom meej qhov ntsuas tensile, ntxiv T thaum kawg ntawm qib los qhia SPCT.
6) SPCD - thawj S sawv cev rau Hlau, qhov thib ob P sawv cev rau Phaj, qhov thib peb C sawv rau Txias, plaub D sawv rau Drawing, thiab tag nrho sawv ntsug rau stamping. Cold-rolled carbon steel nplooj ntawv thiab strips, sib npaug rau Tuam Tshoj tus 08AL (13237) zoo carbon structural steel.
7) SPCE - thawj S sawv cev rau hlau, qhov thib ob P sawv cev rau phaj, qhov thib peb C sawv cev rau txias, plaub E sawv cev rau qhov sib sib zog nqus nqus, thiab tag nrho sawv cev rau txias dov rau sib sib zog nqus nqus. Cov nplooj ntawv carbon steel thiab strips, 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.

JIS Welded Steel Pipe

Lwm cov cim:

1) quenching thiab tempering lis dej num ntawm txias-kuav los tiag carbon steel los xij thiab steel strips: annealing 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.
2) 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.

JIS mechanical structure steel qib sawv cev txoj kev

Qhov thib ib (Ssteel) + qhov thib ob (cov ntsiab lus carbon: qhia raws li tus nqi nruab nrab × 100) + qhov thib peb (cov ntawv code: tsab ntawv C sawv cev rau carbon thiab K sawv cev rau carburizing steel) xws li carbon rolled phaj S20C Nws Cov ntsiab lus carbon yog 0.18-0.23%.