{"id":3586,"date":"2026-07-16T16:26:45","date_gmt":"2026-07-16T08:26:45","guid":{"rendered":"https:\/\/jblstainless.com\/?post_type=product&p=3586"},"modified":"2026-07-16T16:37:46","modified_gmt":"2026-07-16T08:37:46","slug":"q420-a-b-c-d-e-high-strength-steel-plate","status":"publish","type":"product","link":"https:\/\/jblstainless.com\/th\/q420-a-b-c-d-e-high-strength-steel-plate\/","title":{"rendered":"Q420 A B C D E High Strength Steel Plate"},"content":{"rendered":"\t\t
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The Q420 A B C D E High Strength Steel Plate provided by JINBAILAI<\/span> feature high strength, excellent toughness, a clean surface, and are suitable for rough processing. They are delivered to the factory. Please feel free to contact us<\/a><\/span><\/strong><\/span> for more information.<\/p>

The Q420 high-strength plate, due to its high strength and good toughness, is particularly suitable for structural components that need to withstand large loads and complex stresses.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Q420 high-strength plate – What are the differences among each brand?<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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A comparison table of key differences among the main grades of Q420<\/h3>
Grade example<\/th>quality grade<\/th>Impact test temperature<\/th>Upper limit of P\/S content (mass fraction)<\/th>Typical delivery condition\/process<\/th>Core features and applicable scenarios<\/th><\/tr><\/thead>
\u200cQ420B<\/strong>\u200c<\/td>B<\/td>+20\u2103<\/td>\u22640.040%<\/td>Hot rolling (ar)<\/td>It is used at room temperature and has the lowest cost. It is suitable for building frames and ordinary mechanical bases in non-cold regions.<\/td><\/tr>
\u200cQ420C<\/strong>\u200c<\/td>C<\/td>0\u2103<\/td>\u22640.035%<\/td>Hot rolling\/controlled rolling<\/td>Dynamic load above 0\u2103 It is applicable to winter construction in Central and North China, medium-span Bridges and pressure vessels.<\/td><\/tr>
\u200cQ420D<\/strong>\u200c<\/td>D<\/td>-20\u2103<\/td>\u22640.030%<\/td>Controlled rolling\/normalizing (n)<\/td>Toughness in the -20\u2103 cold region; It is widely used in large-span Bridges in cold regions, offshore wind power towers and ship structures.<\/td><\/tr>
\u200cQ420E<\/strong>\u200c<\/td>E<\/td>-40\u2103<\/td>\u22640.025%<\/td>Normalizing \/TMCP+ tempering<\/td>Extreme cold toughness benchmark; It is applicable to LNG storage tanks, polar equipment, nuclear power containment vessels and key dynamic load parts.<\/td><\/tr>
\u200cQ420NB<\/strong>\u200c<\/td>B<\/td>+20\u2103<\/td>\u22640.040%<\/td>Normalizing or normalizing rolling (n)<\/td>The grains are finer than those of hot-rolled ones, and the toughness is slightly better. It should be used when the normalizing state is clear.<\/td><\/tr>
\u200cQ420NC<\/strong>\u200c<\/td>C<\/td>0\u2103<\/td>\u22640.035%<\/td>Normalizing or normalizing rolling (n)<\/td>The impact at 0\u2103 meets the standard and the structure is uniform. It is suitable for structures with high requirements for organizational consistency.<\/td><\/tr>
\u200cQ420ND<\/strong>\u200c<\/td>D<\/td>-20\u2103<\/td>\u22640.030%<\/td>Normalizing or normalizing rolling (n)<\/td>Stable low-temperature performance at -20\u2103. The resistance to layered tearing of thick plates is superior to that of ordinary hot-rolled D grade.<\/td><\/tr>
\u200cQ420NE<\/strong>\u200c<\/td>E<\/td>-40\u2103<\/td>\u22640.025%<\/td>Normalizing or normalizing rolling (n)<\/td>Normalizing is the preferred choice in extremely cold environments. Ensure that the impact energy at -40\u2103 is \u226527J(longitudinal).<\/td><\/tr>
\u200cQ420MB<\/strong>\u200c<\/td>B<\/td>+20\u2103<\/td>\u22640.035%*<\/td>Thermal Mechanical Rolling (m\/TMCP)<\/td>The TMCP process refines the grain size, and its comprehensive mechanical properties are superior to those of hot-rolled products of the same grade. It is often used in thin plate high-strength structures.<\/td><\/tr>
\u200cQ420MC<\/strong>\u200c<\/td>C<\/td>0\u2103<\/td>\u22640.030%*<\/td>Thermal Mechanical Rolling (m\/TMCP)<\/td>It has excellent toughness at 0\u2103 and good weldability. It is suitable for occasions requiring high formability such as construction machinery and vehicle manufacturing.<\/td><\/tr>
\u200cQ420MD<\/strong>\u200c<\/td>D<\/td>-20\u2103<\/td>\u22640.030%<\/td>*Thermal Mechanical Rolling (m\/TMCP)<\/td>High toughness at -20\u2103 and no risk of deformation during subsequent heat treatment; It is widely used in heavy machinery and mining equipment.<\/td><\/tr>
\u200cQ420ME<\/strong>\u200c<\/td>E<\/td>-40\u2103<\/td>\u22640.025%*<\/td>*Thermal Mechanical Rolling (m\/TMCP)<\/td>Extremely cold TMCP state; It combines high strength and high toughness, and is used<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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