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Q345R鋼板是屈服強度為265-345MPa級的壓力容器專用板，它具有良好的綜合力學性能和工藝性能。磷、硫含量略低于低合金高強度鋼板Q345(16Mn)鋼，除抗拉強度、延伸率要求比Q345(16Mn)鋼有所提高外，還要求保證沖擊韌性。它是目前我國用途最廣、用量最大的壓力容器專用鋼板。
Q345R steel plate is a special pressure vessel plate with yield strength of 265-345MPa, which has good comprehensive mechanical properties and processing properties. Phosphorus and sulfur content was slightly lower than that of low alloy high strength steel Q345 (16Mn) steel, in addition to the tensile strength and elongation requirements than Q345 (16Mn) steel has improved, but also to ensure the impact toughness. It is currently the most widely used, the largest amount of special pressure vessel steel plate.
Q245R
Q245R
是鋼板中的一大類－－鍋爐板，牌號表示方法：和Q345R類似低合金高強度結構鋼的牌號用屈服強度值“屈”字和壓力容器“容”字的漢語拼音首位字母 表示。例如：Q245R。Q—“屈”漢語拼音首位字母。245—屈服強度值。R：“容”漢語拼音首位字母。
Is a kind of boiler plate -- the representation of brands: similar to Q345R high strength low alloy structural steel grades that yield strength values with Chinese pinyin "bend" words and pressure vessel "content", the first letter of the word. For example: Q245R. Q - the first letter of Chinese phonetic alphabet. 245 yield strength value. R: "Rong" Pinyin first letter.
具有特殊的成分與性能
With special ingredients and properties
主要用于做壓力容器使用，針對用途，溫度，耐腐的不同，所應該選用的容器板材質，也不盡相同。
Mainly used for pressure vessels, for purposes of temperature, corrosion resistance of the different, should be used to select the material of the container plate, are not the same.
交貨狀態為：熱軋，控軋，正火。經供需方協議加做探傷。
Delivery state: hot rolling, controlled rolling, normalizing. After the agreement for doing inspection.
如：20R，16MnR，14Cr1MoR，15CrMoR，09MnNiDR，12Cr2Mo1R，16MnR(HIC)，20R(HIC)等等分類
Such as: 20R, 16MnR, 14Cr1MoR, 15CrMoR, 09MnNiDR, 12Cr2Mo1R, 16MnR (HIC), 20R (HIC), etc.
以上為國內常用牌號；國外的牌號也有，例如：SA516Gr60、SA516GR70等。
More than the domestic commonly used brands; foreign brands also have, for example: SA516Gr60, SA516GR70, etc..
Q245R鋼中可添加鈮，釩，鈦元素，其含量應填寫在質量證明書中，上述3個元素含量總和應分別不大于0.050%
Q245R steel can be added niobium, vanadium, titanium, its content should be filled in the quality certificate, the above 3 elements should not be greater than the sum of the total content of 0.050%
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