1、鍛件用鋼化學成分（熔煉分析）應符合的規定JB4726-2000鋼 號 化 學 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：對真空碳脫氧鋼，允許Si含量小于或等于0.12%鋼 號公稱厚度mm熱處理狀態回火溫度 拉伸試驗沖擊試驗硬度ÓbMPaÓs MPa5 % 試驗溫度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、根據需方要求，20鋼鍛件20沖擊改作0沖擊，沖擊功AKV27J 2、當附加保證模擬焊后熱處理試樣的力學性能時，回火溫度可另行規定注：N

6、正火 Q淬火 T回火 A退火 S固溶 各級別的檢驗項目所按的規定鍛件級別檢驗項目檢驗數量硬度（HB）逐件檢查拉伸和沖擊（b、s、5、AKV）同冶煉爐號、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）超聲檢測逐件檢查拉伸和沖擊（b、s、5、AKV）逐件檢查超聲檢測逐件檢查超聲波檢測驗收標準(各材質均按此標準)鍛件分類超聲檢測合格等級單個缺陷底波降低量密集區缺陷筒形鍛件用于筒節用于筒件端部法蘭環形鍛件餅形鍛件公稱厚度200mm公稱厚度>200mm碗形鍛件長頸法蘭鍛件條形鍛件注：根據需方要求，對鍛件重要區可提高合格等級。鍛件高溫屈服強度值應符合的規定鋼 號公稱厚度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 號化 學 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 號公稱厚度熱處理狀態回火溫度 拉伸試驗沖擊試驗bMPaÓs MPa5 % 試驗溫度Akv J16MnD300Q+T60045060027520-402720MnMoD300Q+T60053070037018-4027>300500510680350-30>500700490660330-3008MnNiCrMoVD300Q+T60060077048017-404710Ni3MoV

11、D300Q+T60060077048017-504709MnNiD300Q+T60042057026023-7047各級別的檢驗項目所按的規定鍛件級別檢驗項目檢驗數量拉伸和沖擊（b、s、5、AKV）同冶煉爐號、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）超聲檢測逐件檢查拉伸和沖擊（b、s、5、AKV）逐件檢查超聲檢測逐件檢查JB4728-2000類 型鋼 號化 學 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 號公稱厚度mm熱處理狀態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各級別的檢驗項目所按的規定鍛件級別檢驗項目檢驗數量硬度（HB）逐件檢查拉伸（b、0.2、5）同冶煉爐號、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）超聲檢測逐件檢查拉伸（b、0.2、5）逐件檢查超聲檢測逐件檢查壓力容器用鋼板(GB6654-1996)牌號化學成分，%（m/m）CMnSiVMoNbNCrNiSP不大于20R0.200.400.900.150.300.0200.03016MnR0.201.201.600.200.550.0200.030牌 號交貨狀態鋼板厚度mm拉 伸 試 驗沖擊試驗冷彎試驗抗拉強度bMPa屈服點sMPa伸長率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、銅含量當作為殘余元素時應各不大于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。制造標準：GB713-1997GB/T8162-1999 結構鋼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 構 用 鋼（含機械結構用鋼）GB700-88牌號等級化 學 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