Q345R钢板是屈服强度为265-345MPa级的压力容器专用板，它具有良好的综合力学性能和工艺性能。磷、硫含量略低于低合金高强度钢板Q345(16Mn)钢，除抗拉强度、延伸率要求比Q345(16Mn)钢有所提高外，还要求保证冲击韧性。它是目前我国用途广、用量的压力容器专用钢板。

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

是钢板中的一大类－－锅炉板，牌号表示方法：和Q345R类似低合金高强度结构钢的牌号用屈服强度值“屈”字和压力容器“容”字的汉语拼音首位字母 表示。例如：Q245R。Q—“屈”汉语拼音首位字母。245—屈服强度值。R：“容”汉语拼音首位字母。

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.

具有特殊的成分与性能

With special ingredients and properties

主要用于做压力容器使用，针对用途，温度，耐腐的不同，所应该选用的容器板材质，也不尽相同。

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.

交货状态为：热轧，控轧，正火。经供需方协议加做探伤。

Delivery state: hot rolling, controlled rolling, normalizing. After the agreement for doing inspection.

如：20R，16MnR，14Cr1MoR，15CrMoR，09MnNiDR，12Cr2Mo1R，16MnR(HIC)，20R(HIC)等等分类

Such as: 20R, 16MnR, 14Cr1MoR, 15CrMoR, 09MnNiDR, 12Cr2Mo1R, 16MnR (HIC), 20R (HIC), etc.

以上为国内常用牌号；国外的牌号也有，例如：SA516Gr60、SA516GR70等。

More than the domestic commonly used brands; foreign brands also have, for example: SA516Gr60, SA516GR70, etc..

Q245R钢中可添加铌，钒，钛元素，其含量应填写在质量证明书中，上述3个元素含量总和应分别不大于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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