Cov txheej txheem CSP, tseem hu ua cov kab kev cog qoob loo cog qoob loo, yog kub dov thiab tau tsim los ntawm German tuam txhab Sloman – Siemag (SMS) hauv xyoo 1982. Tom qab ntawd nws tau hloov mus rau Nucor Crawfordville cog hauv Tebchaws Meskas thiab tau hloov pauv hloov pauv hauv cov txheej txheem. 1989. Thawj CSP nruam casting thiab dov txheej txheem tiav. CSP txheej txheem: converter los yog hluav taws xob rauv → ladle refining rauv → nyias slab nruam casting tshuab → soaking rauv kub preservation → kub dov zeb → laminar txias → underground coiling.