LR DH50 va LR DH69 po'lat plitalar orasidagi farq

LR DH50 is an extra-high-strength marine steel plate certified by Lloyd's Register (LR) . The "DH" designation signifies it is a higher-strength grade with impact toughness tested at -20℃ . It has a minimum yield strength of 500 MPa and tensile strength ranging from 610 to 770 MPa, with minimum elongation of 18% for thicknesses up to 100mm . Impact energy requirements are minimum 50J (longitudinal) or 33J (transverse) at -20℃ . The chemical composition is strictly controlled with carbon <=0.20% and manganese <=1.70%, featuring microalloying elements including Nb, V, and Ti . This grade is typically supplied in normalized or controlled rolled conditions and is widely used for demanding structural components in shipbuilding and offshore platforms.

LR DH69 ultra{1}}yuqori-bardoshli dengiz po'lat plitasi bo'lib, shuningdek, Lloyd's Register (LR) tomonidan sertifikatlangan, zarbaga chidamliligi -20 daraja sinovdan o'tgan. "69" 690 MPa minimal oqish quvvatini bildiradi. U 770 dan 940 MPa gacha cho'zilish kuchiga ega va qalinligi 100 mm gacha bo'lgan minimal cho'zilish 16% ni tashkil qiladi. Ta'sir energiyasiga bo'lgan talablar -20 daraja da minimal 69J (bo'ylama) yoki 46J (ko'ndalang) dir. Kimyoviy tarkibi DH50 ga o'xshaydi, uglerod 0,20% dan kam yoki teng va marganets 1,70% dan kam yoki teng, mikroqotishma elementlari bilan birga. Bu sinf kemasozlik, ultra{24}}katta konteynerli kemalar va maksimal kuch-og‘irlik nisbatini talab qiluvchi dengiz tuzilmalaridagi eng talabchan yuk ko‘taruvchi ilovalar uchun mo‘ljallangan.

LR DH50 va LR DH69 ham LR{2}}sertifikatlangan qoʻshimcha-yuqori{4}}dengiz poʻlatlari boʻlib, zarbaga chidamliligi -20 darajada sinovdan oʻtgan va sovuq dengiz muhitida ishonchli ishlashni taʼminlaydi. Ularning asosiy farqi mustahkamlik darajasidadir: DH50 610-770 MPa valentlik quvvati bilan 500 MPa minimal oqish quvvatini taklif etadi, bu esa yuqori quvvatli dengiz tuzilmalari uchun mos keladi, DH69 esa ancha yuqori minimal oqish quvvati 690 MPa va valentlik kuchi taxminan 770% ga etadi. maksimal vazn kamaytirish talab talab ilovalar. Ikkala nav ham uglerod 0,20% dan kam yoki unga teng va marganets 1,70% dan kam yoki teng bo'lgan o'xshash boshqariladigan kimyoviy tarkibga ega va muhim dengiz xizmati uchun yaxshi payvandlanishni saqlab, yuqori mexanik xususiyatlarga erishish uchun TMCP yoki söndürme va temperatura kabi ilg'or ishlov berishni talab qiladi.

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