长期供应Cr含量在1.0左右的苏州20Cr圆钢与苏州40Cr圆钢，国标材质、性能稳定，并可加工20Cr与40Cr冷拉光圆/光亮圆钢/扁钢/方钢/六角钢等，只需一个电话满足客户所需。经销碳结圆钢、合结圆钢、合金圆钢、齿轮钢、轴承钢、弹簧钢等。材质有： 20Cr、35Cr、40Cr、20CrMo、30CrMo、35CrMo、42CrMo、20CrMnTi、GCr15等。

公司主要销售：20#、35#、45#、20CrMnTi齿轮钢、20CrMo、35CrMo、42CrMo、40Cr等圆钢、弹簧钢、轴承钢、齿轮钢。现已是国内**大型模具开发公司、军工企业、机械加工厂和汽车制造业的供应商。多年来，本着“诚信经营、品质至上”和“厚德载物、共创双赢”的经营信条；公司经销东北特钢、包钢、西宁特钢、大冶特钢等钢厂材料。  

20Cr与40Cr性能对比：

20Cr较高的强度及淬透性，在油中临界淬透直径达4 ～22mm，在水中临界淬透直径达11～40mm，但韧性较差，此钢渗碳时仍有晶粒长大倾向，降温直接淬火对冲击韧性影响较大，所以渗碳后需二次淬火以提高零件心部韧性，无回火脆性；钢的冷应变塑性高，可在冷状态下拉丝；可切削性在高温正火或调质状态下良好，但退火后较差；20Cr为珠光体，焊接性较好，焊后一般不需热处理，但厚度大于15mm的零件在焊前需预热到100～150℃，焊后也可不进行回火热处理。40Cr圆钢经调质后用于制造承受中等负荷及中等速度工作的机械零件，如汽车的转向节、后半轴以及机床上的齿轮、轴、蜗杆、花键轴、**套等；经淬火及中温回火后用于制造承受高负荷、冲击及中等速度工作的零件，如齿轮、主轴、油泵转子、滑块、套环等；经淬火及低温回火后用于制造承受重负荷、低冲击及具有耐磨性、截面上实体厚度在25mm以下的零件，如蜗杆、主轴、轴、套环等；经调质并高频表面淬火后用于制造具有高的表面硬度及耐磨性而无很大冲击的零件，如齿轮、套筒、轴、主轴、曲轴、心轴、销子、连杆、 螺钉、螺帽、进气阀等。此外，这种钢又适于制造进行碳氮共渗处理的各种传动零件，如直径较大和低温韧性好的齿轮和轴。 

苏州20CrMo/30CrMo/35CrMo/42CrMo圆钢、南通、连云港、淮安、盐城、扬州、镇江、泰州、宿迁、江阴、六安、亳州、池州、宣城、金坛、溧阳、常熟、张家港、武进、句容、建湖、泰兴、姜堰、靖江、兴化、太仓、昆山、吴江、如皋、海门、启东、东台、海安、高邮、仪征、丹阳、扬中、杭州、宁波、温州、嘉兴、湖州、绍兴、金华、衢州、舟山、台州、丽水、合肥、芜湖、蚌埠、淮南、马鞍山、淮北、铜陵、安庆、黄山、滁州、阜阳、宿州、无锡、南京、徐州、宜兴、常州20Cr/35Cr/40Cr圆钢、High strength and quenched 20Cr permeability, the critical quenching oil through the diameter of 4 ~ 22mm, in the water critical hardenable diameter of 11 ~ 40mm, but the toughness is poor, the steel still has the tendency of grain growing, direct cooling quenching has great influence on the impact toughness, so after carburizing quenching to two times improve parts core toughness, no temper brittleness; cold steel strain high plasticity, can be brushed in a cold state; machinability in high temperature normalizing and tempering condition is good, but the poor 20Cr after annealing; pearlite, good weldability, general heat treatment after welding is not required, but the thickness of more than 15mm parts must be preheated to 100 ~ 150 degrees before welding, after welding with or without heat treatment. 40Cr steel quenched for the manufacture of mechanical parts under medium load and medium speed work, such as the car steering knuckle, half shaft and machine on the gear shaft, worm, spline shaft, etc. the top set; quenching and tempering after used in the manufacture of high load, impact and moderate speed working parts, such as gear, shaft, pump rotor, slider, ring etc.; after quenching and low temperature tempering for manufacturing under heavy load, low impact and abrasion resistance, the thickness of the parts with solid section below 25mm, such as worm, spindle, shaft, collar; quenched and high frequency quenching for manufacturing with surface the hardness and high wear resistance and no great impact on the parts, such as gear, shaft, sleeve, spindle, spindle, crankshaft, connecting rod, pin, screw, nut, valve etc.. In addition, this kind of steel is suitable for the manufacture of various kinds of transmission parts, such as the diameter of large diameter and low temperature toughness of good gear and shaft.

张家港20Cr圆钢与张家港40Cr圆钢特性对比

常熟20Cr圆钢与吴江40Cr圆钢价格对比

太仓20Cr圆钢与昆山40Cr圆钢用途对比

苏州20Cr圆钢与苏州40Cr圆钢特性对比