鍛件用鋼化學(xué)成分

1、鍛件用鋼化學(xué)成分（熔煉分析）應(yīng)符合的規(guī)定JB4726-2000鋼 號(hào) 化 學(xué) 成 分 %CSiMnMoCrVNbPSNiCu20 #0.170.230.170.370.601.000.250.0300.0200.250.2516Mn0.130.190.200.601.201.600.300.0300.0200.300.2535 #0.320.380.170.370.500.800.250.0300.0200.250.2515CrMo0.120.180.100.600.300.800.450.650.801.250.0300.0200.300.2535CrMo0.320.380.170.370.

2、400.700.150.250.801.100.0300.0200.300.251Cr5Mo0.150.500.600.450.654.006.000.0300.0200.500.2520MnMo0.170.230.170.371.101.400.200.350.300.0250.0150.300.2520MnMoNb0.170.230.170.371.301.600.450.650.300.0250.0500.0250.0150.300.2514Cr1Mo0.110.170.500.800.300.800.450.651.151.500.0250.0150.300.2512Cr1MoV0.0

3、90.150.170.370.400.700.250.350.901.200.150.300.0300.0200.300.2512Cr2Mo10.150.500.300.600.901.102.002.500.0250.0150.300.25 注：對(duì)真空碳脫氧鋼，允許Si含量小于或等于0.12%鋼 號(hào)公稱厚度mm熱處理狀態(tài)回火溫度 拉伸試驗(yàn)沖擊試驗(yàn)硬度ÓbMPaÓs MPa5 % 試驗(yàn)溫度AKV JHB20 #200N390-54021524203410615916Mn300N ，N+T6004506002752003112117835 #100N5106702651820

4、24136200>100300N，N+T59049064024518202413019015CrMo300N+TQ+T620440610275202034118180>30050043060025520203411517835CrMo300Q+T58062079044015 2034185235>3005006107804301520341802231Cr5Mo500N+TQ+T68059076039018203417422920MnMo300Q+T60053070037018034156208>30050051068035018034136201>5007004

5、906603301803413019620MnMoNb300Q+T63062079047016034185235>3005006107804601603418023314Cr1Mo300N+TQ+T620490660290192041130196>30050048065028019204112819312Cr1MoV300N+TQ+T680440610255192034118180>300500430600245192034115178注：1、根據(jù)需方要求，20鋼鍛件20沖擊改作0沖擊，沖擊功AKV27J 2、當(dāng)附加保證模擬焊后熱處理試樣的力學(xué)性能時(shí)，回火溫度可另行規(guī)定注：N

6、正火 Q淬火 T回火 A退火 S固溶 各級(jí)別的檢驗(yàn)項(xiàng)目所按的規(guī)定鍛件級(jí)別檢驗(yàn)項(xiàng)目檢驗(yàn)數(shù)量硬度（HB）逐件檢查拉伸和沖擊（b、s、5、AKV）同冶煉爐號(hào)、同爐熱處理的鍛件組成一批、每批抽檢一件拉伸和沖擊（b、s、5、AKV）超聲檢測(cè)逐件檢查拉伸和沖擊（b、s、5、AKV）逐件檢查超聲檢測(cè)逐件檢查超聲波檢測(cè)驗(yàn)收標(biāo)準(zhǔn)(各材質(zhì)均按此標(biāo)準(zhǔn))鍛件分類超聲檢測(cè)合格等級(jí)單個(gè)缺陷底波降低量密集區(qū)缺陷筒形鍛件用于筒節(jié)用于筒件端部法蘭環(huán)形鍛件餅形鍛件公稱厚度200mm公稱厚度>200mm碗形鍛件長(zhǎng)頸法蘭鍛件條形鍛件注：根據(jù)需方要求，對(duì)鍛件重要區(qū)可提高合格等級(jí)。鍛件高溫屈服強(qiáng)度值應(yīng)符合的規(guī)定鋼 號(hào)公稱厚度mm在

7、下列溫度（）下的0.2（s），Mpa 20025030035040045050020MnMo300305295285275260240->300500290280270260245225->500700280270260250235215-20MnMoNb300405395385370355335->300500405395385370355335-15CrMo300220210196186176167162>30050020019017616715715214735CrMo300370360350335320295->3005003703603503353202

8、95-12Cr1MoV300200190176167157152142>30050020019017616715715214214Cr1Mo300240230220210200190175>30050023022021020019018017012Cr2Mo1300260255250245240230215>300500255250245240235225215JB4727-2000鋼 號(hào)化 學(xué) 成 分 % CSiMnMoCrNiVNbAlsPSCu16MnD0.130.180.200.601.201.600.300.400.0300.0150.0250.0150.2520M

9、nMoD0.160.220.170.371.101.400.200.350.300.400.0150.0250.0150.2508MnNiCrMoVD0.100.200.401.101.400.200.500.200.601.201.600.020.060.0200.0150.2510Ni3MoVD0.080.120.150.250.700.900.200.300.302.503.000.020.060.0150.0150.2509MnNiD0.120.150.351.201.600.300.450.850.0500.0150.0200.0150.25 注：1、對(duì)真空碳脫氧鋼，允許Si含量小于

10、或等于0.12% 2、08MnNiCrMoVD鋼的焊接冷裂紋敏感性組成Pcm0.25% Pcm=C+Si/30+Mn/20+Cu/20+Cr/20+Ni/60+Mo/15+V/10+5B(%)鋼 號(hào)公稱厚度熱處理狀態(tài)回火溫度 拉伸試驗(yàn)沖擊試驗(yàn)bMPaÓs MPa5 % 試驗(yàn)溫度Akv J16MnD300Q+T60045060027520-402720MnMoD300Q+T60053070037018-4027>300500510680350-30>500700490660330-3008MnNiCrMoVD300Q+T60060077048017-404710Ni3MoV

11、D300Q+T60060077048017-504709MnNiD300Q+T60042057026023-7047各級(jí)別的檢驗(yàn)項(xiàng)目所按的規(guī)定鍛件級(jí)別檢驗(yàn)項(xiàng)目檢驗(yàn)數(shù)量拉伸和沖擊（b、s、5、AKV）同冶煉爐號(hào)、同爐熱處理的鍛件組成一批、每批抽檢一件拉伸和沖擊（b、s、5、AKV）超聲檢測(cè)逐件檢查拉伸和沖擊（b、s、5、AKV）逐件檢查超聲檢測(cè)逐件檢查JB4728-2000類 型鋼 號(hào)化 學(xué) 成 分 %CSiMnCrNiMoTiPS鐵素體型0Cr130.081.001.0011.5013.500.600.0350.030奧氏體型3040Cr18Ni90.071.002.0017.0019.008

12、.0011.000.0350.030314L00Cr19Ni100.031.002.0018.0020.008.0012.000.0350.0303160Cr17Ni12Mo20.081.002.0016.0018.0010.0014.002.003.000.0350.030316L00Cr17Ni14Mo20.031.002.0016.0018.0012.0015.002.003.000.0350.03018-81Cr18Ni9Ti0.121.002.0017.0019.008.0011.005(C%0.02)0.800.0350.0303210Cr18Ni10Ti0.081.002.001

13、7.0019.009.0012.005×C%0.0350.0300Cr18Ni12Mo2Ti0.081.002.0016.0019.0011.0014.001.802.505×C%0.700.0350.030奧氏體鐵素體型00Cr18Ni5Mo3Si20.031.302.001.002.0018.0019.504.505.502.503.000.0300.020 注：1、1Cr18Ni9Ti鋼不推薦使用 2、00Cr18Ni5Mo3Si2鋼中N0.10%鋼 號(hào)公稱厚度mm熱處理狀態(tài)bMPa0.2Mpa5 %HB硬度抗拉 屈服 延伸0Cr13100A（800900緩冷）410

14、205201101830Cr18Ni9100S （10101150 快冷）52020535139187>1002004902053513118700Cr19Ni10100S （10101150 快冷）48017535128187>100200450175351211870Cr17Ni12Mo2100S （10101150 快冷）52020535139187>1002004902053513118700Cr17Ni14Mo2100S （10101150 快冷）48017535128187>100200450175351211871Cr18Ni9Ti100S （920115

15、0快冷）52020535139187>100200490205351311870Cr18Ni10Ti100S （9201150快冷）52020535139187>100200490205351311870Cr18Ni12Mo2Ti100S （10501100快冷）52020535139187>1002004902053513118700Cr18Ni5Mo3Si2100S （9501050快冷）59039020175235各級(jí)別的檢驗(yàn)項(xiàng)目所按的規(guī)定鍛件級(jí)別檢驗(yàn)項(xiàng)目檢驗(yàn)數(shù)量硬度（HB）逐件檢查拉伸（b、0.2、5）同冶煉爐號(hào)、同爐熱處理的鍛件組成一批、每批抽檢一件拉伸（b、0.2

16、、5）超聲檢測(cè)逐件檢查拉伸（b、0.2、5）逐件檢查超聲檢測(cè)逐件檢查壓力容器用鋼板(GB6654-1996)牌號(hào)化學(xué)成分，%（m/m）CMnSiVMoNbNCrNiSP不大于20R0.200.400.900.150.300.0200.03016MnR0.201.201.600.200.550.0200.030牌 號(hào)交貨狀態(tài)鋼板厚度mm拉 伸 試 驗(yàn)沖擊試驗(yàn)冷彎試驗(yàn)抗拉強(qiáng)度bMPa屈服點(diǎn)sMPa伸長(zhǎng)率5 %溫度V型沖擊功Akv (橫向) Jb=2a180º不小于不小于20R熱軋、控軋式正火616>1636>3660>60100400520245235225205250

17、27d=2a3905102416MnR616>1636>3660>60100>10012051064049062047060046059045058034532530528527521031d=2ad=3a20注：厚度大于60mm的20R，錳含量上限可以提高到1.00%。 鉻、鎳、銅含量當(dāng)作為殘余元素時(shí)應(yīng)各不大于0.30%，其總含量不大于0.60%，供方如能保證，可不做分析。 為改善20R、16MnR的性能，可添加微量合金元素。20g：Mn含量0.500.90，其它與20#相同。制造標(biāo)準(zhǔn)：GB713-1997GB/T8162-1999 結(jié)構(gòu)鋼GB/T8163-1999

18、流體鋼GB3087-1999 中低壓鍋爐管GB5310-1995 高壓鍋爐管GB6479-2000 化肥專用管GB9948-88 石油裂化管GB713-1997 鍋爐用鋼板GB/T14976-2002 流體不銹鋼管GB/T3274-1988GB3531-1996結(jié) 構(gòu) 用 鋼（含機(jī)械結(jié)構(gòu)用鋼）GB700-88牌號(hào)等級(jí)化 學(xué) 成 分 %脫氧方式CMnSiSP不 大 于Q235AB0.140.220.120.200.300.650.300.700.300.0500.0450.045F、b、zCD0.180.170.350.800.0400.0350.0400.035zTZ 注：Q235A、Q235B沸騰鋼Mn含量上限為0.60%。 沸騰鋼