Kusintha kwa miyezo yapadziko lonse lapansi komwe kunatsogozedwa ndi China pankhani ya mbale zachitsulo ndi zingwe kwafalitsidwa mwalamulo

Muyezowu unaperekedwa kuti usinthidwe mu 2022 pamsonkhano wapachaka wa Komiti Yaing'ono ya ISO/TC17/SC12 Steel/Continuously Rolled Flat Products, ndipo unayambitsidwa mwalamulo mu Marichi 2023. Gulu logwira ntchito lolemba lidatenga zaka ziwiri ndi theka, pomwe msonkhano umodzi wa gulu logwira ntchito ndi misonkhano iwiri yapachaka idachitika kuti pakhale zokambirana zamphamvu, ndipo mu Epulo 2025, kope lachisanu ndi chimodzi la muyezo wosinthidwa wa ISO 4997:2025 "Structural Grade Cold Rolled Carbon Thin Steel Plate" linayambitsidwa.

Muyezo uwu ndi kusintha kwina kwa muyezo wapadziko lonse komwe kunatsogozedwa ndi China pambuyo poti China yatenga udindo wa tcheyamani wa ISO/TC17/SC12. Kutulutsidwa kwa ISO 4997:2025 ndi kupita patsogolo kwina kwa China pakugwira nawo ntchito yokhazikitsa miyezo yapadziko lonse lapansi m'munda wa mbale zachitsulo ndi zingwe pambuyo pa ISO 8353:2024.

Zinthu zopangidwa ndi chitsulo chozizira chozungulira ndi zitsulo zopangidwa ndi kaboni zakhala zikugwira ntchito yokonza mphamvu ndi kuchepetsa makulidwe, motero kuchepetsa kulemera kwa zinthu zomaliza, kukwaniritsa cholinga chachikulu chosunga mphamvu ndi kuchepetsa mpweya woipa, ndikukwaniritsa lingaliro lopanga la "chitsulo chobiriwira". Mtundu wa 2015 wa muyezo wa mphamvu yopangira yomwe imagwiritsidwa ntchito kwambiri pamsika ya 280MPa chitsulo sichinatchulidwe. Kuphatikiza apo, zomwe zili mu muyezo, monga kukhwima kwa pamwamba ndi kulemera kwa batch, sizikukwaniritsa zosowa zenizeni za kupanga kwamakono. Pofuna kupititsa patsogolo kugwiritsidwa ntchito kwa muyezo, Metallurgical Industry Information Standards Research Institute idakhazikitsa Anshan Iron & Steel Co. kuti ipemphe pulojekiti yatsopano yapadziko lonse lapansi ya ntchito iyi. Mu ndondomeko yokonzanso, zofunikira zaukadaulo za giredi yatsopanoyi zidatsimikizika pokambirana ndi akatswiri ochokera ku Japan, Germany ndi United Kingdom nthawi zambiri, kuyesetsa kukwaniritsa zofunikira pakupanga ndi kuwunika m'dziko lililonse ndikukulitsa kuchuluka kwa kugwiritsa ntchito muyezo. Kutulutsidwa kwa ISO 4997:2025 “Structural Grade Cold-Rolled Carbon Thin Steel Plate” kumakankhira giredi zatsopano ndi miyezo yomwe idafufuzidwa ndikupangidwa ndi China padziko lonse lapansi.