碳結(jié)鋼_45碳結(jié)鋼 -概述
45#鋼是含炭量在0.45%的碳素結(jié)構(gòu)鋼,又稱45碳結(jié)鋼,屬于高碳鋼,強(qiáng)度高,但韌性差.
45#是不規(guī)范的,GB標(biāo)準(zhǔn)是45,歸屬優(yōu)質(zhì)碳素結(jié)構(gòu)鋼,硬度不高易切削加工,模具中常用來做模板,梢子,導(dǎo)柱等,但須熱處理.45#鋼廣泛用于機(jī)械制造,這種鋼的機(jī)械性能很好.
這類鋼中有害雜質(zhì)及非金屬夾雜物含量較少,化學(xué)成分控制得也較嚴(yán)格,塑性、韌性較好,運用于制造較重要的機(jī)械零件.這類鋼的牌號用兩位數(shù)字表示平均含碳量的萬分?jǐn)?shù),如45鋼即表示C=0.45%的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼.
根據(jù)含錳量的不同,將含錳量為(0.25~0.80)%的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼稱為普通含錳鋼,將含錳量為(0.70~1.20)%的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼稱為較高含錳量鋼(標(biāo)出錳元素),優(yōu)質(zhì)碳素結(jié)構(gòu)鋼的牌號及化學(xué)成分、機(jī)械性能見表18-6.
45碳結(jié)鋼45碳結(jié)鋼45碳結(jié)鋼規(guī)格厚度*寬度*長度(mm) 標(biāo)準(zhǔn):GB711,WTB重量 (噸)定軋優(yōu)碳鋼板議價幅度明顯已更新為標(biāo)準(zhǔn)舞鋼金益全舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼8*1500-2550*9200-12500......☏:13`*903*756*141宋總186.188T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼9*1850-2600*9200-12450......☎:1588`*6787*`297邢136.537T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼10*2650-3000*8000-10000......☏:13`*903*756*141宋總221.381T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼12*1800-2550*9000-11000M.......☎:1588`*6787*`297邢235.377T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼14*1850-2500*7600-10000M☏:13´903*756´141宋總165.027T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼15*2000-3000*6800-14000M☎:1588`*6787*297邢238.839T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼16*2050-3000*8000-12100......☏:13`*903*756*141宋總199.406T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼17*2200-2900*7600-11350M☏:13´903*756´141宋總116.154T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼18*1700-2200*9300-15900M.......☎:1588`*6787*`297邢168.481T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼20*2200-3400*8800-10500......☏:13`*903*756*141宋總164.316T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼22*2600-3100*8150-10100M☎:1588`*6787*297邢187.631T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼24*1900-2360*8770-13700M☏:13´903*756´141宋總148.956T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼25*2000-2950*8000-11000M☎:1588`*6787*297邢175.095T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼26*2000-2950*9700-13000......☏:13`*903*756*141宋總144.577T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼28*1800-2450*7800-10000........☎:1588`*6787*`297邢89.771T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼30*1820-2450*9450-10800M☏:13´903*756´141宋總145.525T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼32*1800-3200*8000-11200M☎:1588`*6787*297邢180.433T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼34*1950-2850*8600-10200M☎:1588`*6787*297邢125.526T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼35*1800-2700*7800-11800......☏:13`*903*756*141宋總152.484T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼36*1950-2400*7800-11000.......☎:1588`*6787*`297邢132.29T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼38*2420-3200*9200-14000M☏:13´903*756´141宋總120.093T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼40*1900-2800*8150-12000M☎:1588`*6787*297邢164.953T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼44*1800-2400*8500-12000......☏:13`*903*756*141宋總252.222T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼45*1800-2470*8350-10200........☎:1588`*6787*`297邢174.363T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼46*1800-2340*8000-10900M☏:13´903*756´141宋總225.464T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼48*1950-2850*9500-14000M☎:1588`*6787*297邢156.281T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼50*1900-2800*9300-12500......☏:13`*903*756*141宋總164.282T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼52*2100-2600*8800-12000........☎:1588`*6787*`297邢113.544T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼55*1820-2300*8000-11800M☏:13´903*756´141宋總318.904T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼56*2510-3200*9500-15400M☎:1588`*6787*297邢132.992T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼59*2400-3100*8200-11400......☏:13`*903*756*141宋總218.115T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼60*2220-2950*8500-12000........☎:1588`*6787*`297邢220.604T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼64*2250-2850*8600-13150M☏:13´903*756´141宋總368.781T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼65*1800-2500*8400-12000M☎:1588`*6787*297邢288.327T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼70*2200-2900*9300-13000......☏:13`*903*756*141宋總175.707T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼72*2250-2950*6000-9500........☎:1588`*6787*`297邢130.14T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼74*2240-2980*8200-12000M☏:13´903*756´141宋總227.67T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼75*1700-2800*7590-11500M☎:1588`*6787*297邢181.904T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼76*2600-3100*3800-5600......☏:13`*903*756*141宋總178.348T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼78*2320-2850*4500-9500........☎:1588`*6787*`297邢129.489T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼80*2300-2900*9300-12000M☏:13´903*756´141宋總215.319T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼82*2340-3100*5600-9500M☎:1588`*6787*297邢226.585T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼85*2200-2500*9300-10350......☏:13`*903*756*141宋總196.931T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼88*2130-2850*7400-10000........☎:1588`*6787*`297邢208.962T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼90*2300-3600*9400-11000M☏:13´903*756´141宋總250.461T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼92*2100-2900*6800-9800M☎:1588`*6787*297邢326.431T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼95*2150-2680*9300-10850......☏:13`*903*756*141宋總136.106T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼96*2150-2650*8050-11500........☎:1588`*6787*`297邢126.043T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼98*1710-2470*9200-12400M☏:13´903*756´141宋總281.438T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼100*1800-2500*8700-10500........☎:1588`*6787*`297邢220.305T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼102*1900-2500*7950-10500.....☏:13`*903*756`*141宋總330.139T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼105*2200-2950*6900-12300........☎:1588`*6787*`297邢268.934T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼106*2600-3200*8750-11200M☏:13´903*756´141宋總363.93T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼110*1700-2400*8000-11800........☎:1588`*6787*`297邢220.523T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼112*1750-2400*6250-9600.....☏:13`*903*756`*141宋總161.157T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼115*2200-2900*8500-11000M☎:1588`*6787*297邢561.688T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼116*2400-3000*7200-10000M☏:13´903*756´141宋總313.735T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼120*2000-2900*7000-10000........☎:1588`*6787*`297邢320.042T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼125*1760-2560*8400-10400.....☏:13`*903*756`*141宋總81.306T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼126*1760-2360*7800-12000M☎:1588`*6787*297邢302.561T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼130*2600-3350*8500-10560M☏:13´903*756´141宋總160.102T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼132*2030*2650*8500-12300........☎:1588`*6787*`297邢360.88T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼135*2200-2900*9600-11500.....☏:13`*903*756`*141宋總150.374T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼140*1700-2400*8100-12100M☎:1588`*6787*297邢192.386T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼150*2100-2600*7200-11250M☏:13´903*756´141宋總320.507T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼160*1960-2460*7600-12250........☎:1588`*6787*`297邢320.062T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼180*1800-2300*7350-11250.....☏:13`*903*756`*141宋總152.358T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼190*2210-2610*8400-12000M☎:1588`*6787*297邢198.966T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼195*2200-2800*6600-9600M☏:13´903*756´141宋總46.226T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼200*1720-3060*7000-12000........☎:1588`*6787*`297邢69.408T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼202*2200-2900*4400-8500.....☏:13`*903*756`*141宋總88.35T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼210*1500-2200*5900-9500M☎:1588`*6787*297邢68.589T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼215*1500-2500*8500-12000M☏:13´903*756´141宋總96.563T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼220*2170-2670*6000-9000........☎:1588`*6787*`297邢58.866T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼230*1800-2300*6700-10000.....☏:13`*903*756`*141宋總200.911T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼232*1800-2600*6200-11400M☎:1588`*6787*297邢80.161T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼240*2000-2500*5000-10000M☏:13´903*756´141宋總64.89T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼250*2100-2900*8500-12000........☎:1588`*6787*`297邢86.599T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼260*1900-2500*6200-10000.....☏:13`*903*756`*141宋總110.459T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼260*1970-2470*7500-11500M☎:1588`*6787*297邢100.459T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼270*2000-2600*6000-11500M☏:13´903*756´141宋總120.744T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼272*2070-2650*5000-9500........☎:1588`*6787*`297邢69.994T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼280*2390-3100*7500-12000.....☏:13`*903*756`*141宋總90.836T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼290*1940-2600*6600-13000M☎:1588`*6787*297邢79.177T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼300*2390-3200*6500-10000M☏:13´903*756´141宋總56.675T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷45碳結(jié)鋼45碳結(jié)鋼320*2630-3500*9500-15000M...☏:13`*903*756`*141宋總261.823T優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼金益全45碳結(jié)鋼45碳結(jié)鋼其它規(guī)格協(xié)商定軋​優(yōu)碳鋼板45#標(biāo)準(zhǔn):GB711,WTB舞鋼協(xié)議直銷
熱處理推薦熱處理溫度:正火850,淬火840,回火600.
45號鋼為 優(yōu)質(zhì)碳素結(jié)構(gòu)用鋼 ,硬度不高易切削加工,模具中常用來做45號鋼管
模板,梢子,導(dǎo)柱等,但須熱處理 。
1. 45號鋼淬火后沒有回火之前,硬度大于HRC55(最高可達(dá)HRC62)為合格。
實際應(yīng)用的最高硬度為HRC55(高頻淬火HRC58)。
2. 45號鋼不要采用滲碳淬火的熱處理工藝。
調(diào)質(zhì)處理后零件具有良好的綜合機(jī)械性能,廣泛應(yīng)用于各種重要的結(jié)構(gòu)零件,特別是那些在交變負(fù)荷下工作的連桿、螺栓、齒輪及軸類等。但表面硬度較低,不耐磨。可用調(diào)質(zhì)+表面淬火提高零件表面硬度。
一般用于表面耐磨、芯部耐沖擊的重載零件,其耐磨性比調(diào)質(zhì)+表面淬火高。其表面含碳量0.8--1.2%,芯部一般在0.1--0.25%(特殊情況下采用0.35%)。經(jīng)熱處理后,表面可以獲得很高的硬度(HRC58--62),芯部硬度低,耐沖擊。
如果用45號鋼滲碳,淬火后芯部會出現(xiàn)硬脆的馬氏體,失去滲碳處理的優(yōu)點?,F(xiàn)在采用滲碳工藝的材料,含碳量都不高,到0.30%芯部強(qiáng)度已經(jīng)可以達(dá)到很高,應(yīng)用上不多見。0.35%從來沒見過實例,只在教科書里有介紹??梢圆捎谜{(diào)質(zhì)+高頻表面淬火的工藝,耐磨性較滲碳略差。
GB/T699-1999標(biāo)準(zhǔn)規(guī)定的45鋼推薦熱處理制度為850℃正火、840℃淬火、600℃回火,達(dá)到的性能為屈服強(qiáng)度≥355MPa
GB/T699-1999標(biāo)準(zhǔn)規(guī)定45鋼抗拉強(qiáng)度為600MPa,屈服強(qiáng)度為355MPa,伸長率為16%,斷面收縮率為40%,沖擊功為39J

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