文档介绍：牌号化学成分(熔炼分析)%力学性能 position(heat analysis)% Mechanical Properties steel grades C%≤ Si% ≤ Mn% ≤ P%≤ S%≤δs Mpa ≥δb Mpa ≥δ%≥≤ 5mm Q195 - - 195 315 - 430 33 Q235A - - 235 375 - 500 26 Q235B - - 235 375 - 500 26 Q235C ≤ - 235 375 - 500 26 Q255A - - 255 410 - 550 24 Q255B - - 255 410 - 550 24 Q345A - - 345 470 - 630 21 Q345B - - 345 470 - 630 21 Q345C ≤ - 345 470 - 630 22 8 - - - 195 325 33 SS330 205 330 - 430 26 SS400 245 400 - 510 21 SS490 285 490 - 610 19 SM400A ≤ ≥ 245 400 - 510 23 SM400B ≤ - 245 400 - 510 23 SM490B ≤ 325 490 - 610 22 SM490C ≤ 325 490 - 610 22 SPTH1 - 270 32 SPTH2 - 340 25 SPTH3 - - 410 22 HP295 1 295 440 26 HP325 325 490 21 HP345 345 510 20 力学性能冷弯弯心直径 V型冲击 Mechanical Properties Cold bending V- impact20 ℃≥(J) diameter δ%≥≤ 5mm >5mm 33 α- 26 α- 26α 27 26α0℃ 27 242α- 242α 27 212α- 212α 34 222α0℃ 34 33-- 21 α 17 α 152α 183α- 183α0℃ 27 173α0℃ 27 174α0℃ 27 35 帖紧 Pressure of metal - to- metal sticking - 301α- 25 α- 262α常温 Normal temperature 212α常温 Normal temperature 27 202α常温 Normal temperature 主要产品牌号、用途及执行标准 steel grades,applications and production standards 执行标准牌号典型用途产品特点 Production Standards Steel grades Typical application Product Features GB700 Q195 Q235 建筑、桥梁、工程机械、具有较好的综合机械性能,满足结构件加工、焊接的一般要求 prehensive mechanical property:satisfying general demands of machining and welding of ponent