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个人中心收藏查看我的收藏0有用+10Q345D播报讨论上传视频中国生产的钢板Q345D是中国常用的低合金钢板，执行标准为GB/T1591-2008《低合金高强度结构钢》。中文名Q345D
别    名Q345D无缝钢管
C≤0.18；
S    i≤0.50；
M    n≤1.70

目录
1简介2定义3国际比较4规格尺寸5焊接性能6Q345钢比较
简介
播报编辑1.Q345D为低合金钢板2.执行标准：GB/T1591-2008 《低合金高强度结构钢》3Q345D钢材与Q345A、B、C钢相比而言。低温冲击功的试验温度低（-20℃最小27J）4.机械性能好。含有害物质P，S量比Q345A、B、C要低。5.市场价格比Q345A、B、C要高
定义
播报编辑Q345D为低合金板1 ：牌号表示方法钢的牌号由代表屈服强度的汉语拼音字母，屈服强度数值，质量等级符号三个部分组成，例如：Q345D。其中：Q—钢的屈服强度的“屈”字汉语拼音首位字母；345—屈服强度数值，单位MPa；D—质量等级为D级（等级分为A,B,C,D,E）。当需方需要钢板具有厚度方向性能时，则在上述规定的牌号后加上代表厚度方向（Z向）性能级别的符号，例如：Q345DZ15。2 ：执行标准：GB/T1591、GB/T3274。3 ：化学成分：碳C：≤0.18；硅Si：≤0.50；锰Mn：≤1.70；P：≤0.030；S：≤0.025；Nb：≤0.07；V：≤0.15；钛Ti：≤0.20；铬Cr：≤0.30；镍Ni：≤0.50；铜Cu：≤0.30；N：≤0.012；钼Mo：≤0.10；Al：≥0.015。4 ：力学性能屈服：≤16mm：≥345；16—40mm：≥335；40—63mm：≥325；63—80mm：≥315；80—100mm：≥305；100—150mm：≥285；150—200mm：≥275；200—250：≥275；250—400：≥265。抗拉强度：450—630。伸长率：≥21。冲击试验：-20℃：≥34。5 ：冶炼方法钢由转炉或电炉冶炼，必要时加炉外精炼。6 ：交货状态钢材以热轧，控扎，正火，正火+回火，热机械轧制（TMCP）状态交货。
国际比较
播报编辑Q345D是中国常用的低合金板材。和德国的S355J2，美国的ASTM A529MGr50 是同一级别，化学成分略有差异，机械性能相同。在正火的交货条件下，和德国的S355J2G3是相同,甚至和S355J2G4在性能上几乎一样。可以替换使用。
规格尺寸
播报编辑钢号Q345D厚度*宽度*长度（mm）重量（吨）现货 定轧低合金钢Q345D8*2070-3800*6100-1200016.012T低合金钢Q345D9*1500-4020*3000-1800070T低合金钢Q345D10*1600-3820*6000-9000210.463T低合金钢Q345D11*2000-2200*8850-100012.681T低合金钢Q345D12*2200-2650*8200-1060035.705T低合金钢Q345D13*2000-2500*9000-1235023.071T低合金钢Q345D14*1710-2800*6000-1255040T低合金钢Q345D15*2000-2440*6300-1100015.683T低合金钢Q345D16*1800-2300*5600-830030T低合金钢Q345D17*1800-2600*8000-950019.256T低合金钢Q345D18*2080-3500*7730-12000700.271T低合金钢Q345D19*2000-2440*7000-1260044.639T低合金钢Q345D20*2440-3250*11000-1260090129T低合金钢Q345D20*1600-3250*6600-900073.061T低合金钢Q345D21*2000-3090*11100-12000213.113T低合金钢Q345D22*2440-3110*6100-11140300.078T低合金钢Q345D23*1870-2880*8000-1250026.441T低合金钢Q345D24*1900-2880*6600-12500465.973T低合金钢Q345D25*3080-3250*11000-12000172.137T低合金钢Q345D25*1720-2400*4600-12700182.161T低合金钢Q345D26*2020-2800*8900-10000200.607T低合金钢Q345D27*1800-2500*9550-1285051.646T低合金钢Q345D28*2300-2330*6200-10000120.768T低合金钢Q345D29*3230-2440*6200-1290036.53T低合金钢Q345D30*1800-2520*6220-11800130.313T低合金钢Q348D31*2270-3020*8500-1060029.806T低合金钢Q345D32*2370-2500*10500-11200136.921T低合金钢Q345D34*2440-2600*7656-12700120.30T低合金钢Q345D35*1800-3150*5500-850039.671T.低合金钢Q345D36*2250-2500*9200-12000270.806T低合金钢Q345D37*2300-3020*4300-23600116.706T低合金钢Q345D38*1800-2440*8800-1130043.499T低合金钢Q345D40*2300-2520*7000-12700250.278T低合金钢Q345D42*1900-2950*8700-1302090.188T低合金钢Q345D43-44*2000-3000*1000026.154T低合金钢Q345D45*1800-2400*6500-1100073.815T低合金钢Q345D46*2060-2540*7050-11900280.289T低合金钢Q345D47*2550-2750*12600-950069.107T低合金钢Q345D50*2350-2600*10800-12500720.793T低合金钢Q345D52*2000-3080*8980-12100150.331T低合金钢Q345D53-55*2000-3000*10000149.773T低合金钢Q345D56*2000-2680*10800155.881T低合金钢Q345D58*2550-2520*8200-7360122.32T低合金钢Q345D60*1800-2320*5900-1270072066.073T低合金钢Q345D61-64*2000-3000*1000014.679T低合金钢Q345D65*2000-2300*8460-1000037.61T低合金钢Q345D66-69*2100-3000*1000027.59T低合金钢Q345D70*2000-2350*8650-11800630.763T低合金钢Q345D71-74*2000-3000*10000定低合金钢Q345D75*2600-1900*9900-1065056.302T低合金钢Q345D76*2000-2800*6850-1100027.63T低合金钢Q345D77-79*2000-3000*1000017.49T低合金钢Q345D80*2000-2120*8000-12050810.77T低合金钢Q345D82*2000-3640*9650-1200090.946T低合金钢Q345D85*2220-2330*9950-1005033.886T低合金钢Q345D86-89*2600-3000*1035073.456T低合金钢Q345D90*2000-2450*9000-113002100T低合金钢Q345D91-99**2000-3000*1000012.63T低合金钢Q345D100*2000-2450*5500-12000180.378T低合金钢Q345D102*1900-3400*6400-11200110.909T低合金钢Q345D104-106*2250-3500*9540-12000270.242T低合金钢Q345D108*1550-3400*8500-11400120.918T低合金钢Q345D110*500-2500*800-11200350.243T低合金钢Q345D112*1860-2380*8550-12350270.463T低合金钢Q345D114-115*700-2330*2700-11100156.533T低合金钢Q345D116*2190-3600*7700-10840254.866T低合金钢Q345D118*1800-3940*7400-12000100.162T低合金钢Q345D120*1800-2600*9200-10050240.296T低合金钢Q345D122*2020-3500*800-13000150.879T低合金钢Q345D124-125*1670-2380*5450-10450165.421T低合金钢Q345D126*2600-3900*8450-12000120.275T低合金钢Q345D128-130*700-2500*8400-10050400.117T低合金钢Q345D130*2230-2600*9000-11100190.396T低合金钢Q345D134-135*2020-2580*9700-13000172.914T低合金钢Q345D136*2460-3400*8450-10000370.772低合金钢Q345D138*1670-2400*7550-900026.659T低合金钢Q345D140*2260-2500*9700-12270456.369T低合金钢Q345D141-145*2200-3500*8100-12000120.415T低合金钢Q345D146-150*2350-3450*9000-11000320.628T低合金钢Q345D152*2020-2800*8750-13000110.249T低合金钢Q345D154*2500-3200*8700-12500240.938T低合金钢Q345D156-160*550-2350*8540-10650331.039T低合金钢Q345D162*2000-3380*8100-11100120.044T低合金钢Q345D164*2450-3200*7600-12000245.512T低合金钢Q345D165-170*2380-3200*8600-12500189.253T低合金钢Q345D172-178*2100-2800*7050-10000140.429T低合金钢Q345D180*1770-2370*8230-10600450.113T低合金钢Q345D182-184*2250-3300*8000-12000190.491T低合金钢Q345D185-190*1700-2380*7700-10100263.973T低合金钢Q345D192*1500-2650*7000-9900150.826T低合金钢Q345D194*2650-3390*8600-11000190.102T低合金钢Q345D196-200*1950-2600*7750-9000280.959T低合金钢Q345D202-206*2140-2800*8300-12000280.723T低合金钢Q345D236-240*1900-2800*7180-12000300.401T低合金钢Q345D241-245*1700-2800*7700-11200250.175T低合金钢Q345D246-250*2360-3400*8500-13000280.211T低合金钢Q345D252*2230-3200*4900-850050.762T低合金钢Q345D253-260*2000-2800*8520-13000340.092T低合金钢Q345D266*1950-2860*5000-980020.359T低合金钢Q345D268-270*2220-2500*7250-11000280.486T低合金钢Q345D271-275*1980-2560*8500-1200018.166T低合金钢Q345D292-295*1560-2160*7500-1000080.481T低合金钢Q345D360*2160-2800*7000-1100042.975T低合金钢Q345D大量规格未列出，可双定尺定轧大量低合金钢
焊接性能
播报编辑Q345D钢板焊接需要先预热，因含碳量比较高。1、预热的目的是为了防止冷裂纹的产生。冷裂纹与碳当量有直接关系。因而要分清该材料的碳当量，Q345A（以前的牌号叫16Mn）、Q345D的碳当量是一样的。Q345的碳当量0.3%不到，可以说焊接性还可以（一般说碳当量0.4%上以冷裂纹敏感性增大）。 所以Q345A通常情况下是不预热的。但是当板很厚时，由于冷却很快，还是要预热。曾经20#钢用J422（E4303）焊裂过。如果板厚在70mm以上，不预热风险很大。2、顺便说一下，这个Q345D与平时常用的Q345A区别就在于杂质S、P更少，低温冲击性能更好。从焊接角度说，当母材杂质元素少了，对于控制焊接热裂纹是有好处的。3、当然既然母材选择Q345D材料（比Q345A贵，且供货少），一般说都是有特殊用途，所以焊接材料不会随便选用，最好是按焊接材料说明书使用，如果焊条说明书说要对母材预热，那就预热。因为没有按厂家说明书使用焊接材料，焊缝性能会大打折扣的。
Q345钢比较
播报编辑Q345A 含磷和硫都小于等于0.045%Q345B 含磷和硫都小于等于0.040%Q345C 含磷和硫都小于等于0.035%Q345D 含磷和硫都小于等于0.030%Q345E 含磷和硫都小于等于0.025%而磷和硫杂质元素在钢中越多其冲击韧性就越差Q345A - Q345B 20摄氏度时aKV不小于34Q345C 0摄氏度时aKV不小于34Q345D -20摄氏度时aKV不小于34Q345E -40摄氏度时aKV不小于27终其原因就是钢中的P和S杂质元素的减少才促使了低温下冲击韧性的提高.一个是Q345化学成分一个是Q345的力学性能。新手上路成长任务编辑入门编辑规则本人编辑我有疑问内容质疑在线客服官方贴吧意见反馈投诉建议举报不良信息未通过词条申诉投诉侵权信息封禁查询与解封©2025 Baidu 使用百度前必读 | 百科协议 | 隐私政策 | 百度百科合作平台 | 京ICP证030173号 京公网安备11000002000001号window.PAGE_DATA= 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Q345D价格行情 Q345D新库存 Q345D卷板/中厚板　具有较高的强度、较好的塑性和切削加工性能，一定的焊接性能。小型零件可以淬火强化。 Q345D/现货库存；Q345D； 5*1500*6000 6*1500*6000  8*1500*6000 10*1500*6000 12*1500*6000 14*1500*6000Q345D； 16*2000*8000  18*2000*8000 20*2200*8000  22*2200*6000  24*2200*6000Q345D；  25*2200*6000  30*2200*8000  35*2200*9000 40*2400*8000 45*2400*6000Q345D； 50*2400*5000 55*2400*5500  60*2500*6000Q345D； 6*1500/6000 8*1500*6000  10*1500*6000  12*1500*6000  14*2000*6000 16*2200*6000Q345D； 18*2200*6000  20*2200*6000 25*2200*6000 30*2400*6850  35*2350*6580 40*1800*8500Q345D；  45*2500*6000  50*2500*8000   55*2500*6000 60*2500*6000