常用鋼材尺寸允許偏差范圍(2013)

1、常用鋼鐵材料外形及尺寸允許偏差槽鋼允許偏差GBT7062008工字鋼允許偏差GBT7062008H型鋼允差GBT112632005花紋鋼GBT327791型號高度h腿寬b腰厚d平均腿厚t附：槽鋼平均腿厚[(bd)2處]的允許偏差為6%t；腰彎曲撓度不應(yīng)超過15%腰厚；外形每米彎曲度不大于3mm總彎曲度不大于長度的0.3%；槽鋼不得有明顯的扭轉(zhuǎn)。型號高度h腿寬b腰厚d平均腿厚度t允許偏差mm高度H寬度B腹板厚t1翼緣厚t2規(guī)格尺寸mm允許

2、偏差mm高度h腿寬b腰厚d常用規(guī)格尺寸mm尺寸允許偏差mm基本厚度mm基本厚度允許偏差mm[550374.57.01.51.50.4I10100684.57.62.02.00.5HW10010068高度H＜4002.0≥400~＜6003.0≥6004.0寬度B＜100，2.0≥100~＜2002.5≥2003.0厚度t1＜50.5≥5~＜160.7≥16~＜251.0≥25~＜401.5≥402.0厚度t2＜50.7≥5~＜161.0

3、≥16~＜251.5≥25~＜401.7≥402.0長度≤8m時允許偏差(0~50)長度＞8m時允許偏差（0~80）[6.363404.87.5I12120745.08.4HW1251256.59[6.565404.37.5I12.6126745.08.4HW1501507102.50.3[880435.08.0I14140805.59.1HW1751757.5113.0[10100485.38.52.02.00.5I16160886.

4、09.92.5HW2002008123.5[12120535.59.0I18180946.510.7HW20020412124.00.4[12.6126535.59.0I20a2001007.011.43.03.00.7HW2502509144.5[14a140586.09.5I20b2001029.011.4HW30030010155.00.40.5[14b140608.09.5I22a2201107.512.3HW400400132

5、15.5[16a160636.510.02.02.50.5⑥I22b2201129.512.3HW40040821216.00.50.6[16160658.510.0I24a2401168.013.0HW4144051828[18a180687.010.5I24b24011810.013.0HW35035012197.00.60.7[18180709.010.5I25a2501168.013.0HN7003001324[20a20073

6、7.011.03.03.00.7I25b25011810.013.0HN2001005.588.00.60.8[20200759.011.0I27a2701228.513.7HN3001506.59[22a220777.011.5I27b27012410.513.7HN350175711注：花紋紋高不小于基板厚度的0.2倍[22220799.011.5I28a2801228.513.7HN5002001016[24a240787.012

7、.0I28b28012410.513.7鋼帶（包括連軋鋼板）GBT7092006[24b240809.012.0I30a3001269.014.43.50.8[24c2408211.012.0I30b30012811.014.4公稱厚度mm在下列寬度時厚度允許偏差（PT.A）mm[25a250787.012.0I30c30013013.014.4[25b250809.012.0I32a3201309.515.0600～12001200～

8、15001500～18001800[25c2508211.012.0I32b32013211.515.0[27a270827.512.5I32c32013413.515.00.8～1.50.150.17[27b270849.512.5I36a36013610.015.81.5～2.00.170.190.21[27c2708611.512.5I36b36013812.015.82.0～2.50.180.210.230.25[28a2808

9、27.512.5I36c36014014.015.82.5～3.00.200.220.240.26[28b280849.512.5I40a40014210.516.54.0⑦4.00.93.0～4.00.220.240.260.27[28c2808611.512.5I40b40014412.516.54.0～5.00.240.260.280.29[30a300857.513.5I40c40014614.516.55.0～6.00.260

10、.280.290.31[30b300879.513.5I45a45015011.518.06.0～8.00.290.300.310.35[30c3008911.513.5I45b45015213.518.08.0～10.00.320.330.340.40[40a40010010.5184.04.00.9①4.04.00.9①I45c45015415.518.010.0～12.50.350.360.370.43[40b40010212.5

11、18工字鋼腿平均厚度[(bd)4處]的允許偏差為6%t；腰彎曲撓度不應(yīng)超過15%腰厚；外形彎曲每米≤2mm，總長彎曲≤總長度的0.2%；工字鋼不得有明顯扭轉(zhuǎn)。⑧12.5～15.00.370.380.400.46[40c40010414.51815.0～25.40.400.420.450.50等邊角鋼允差GBT7062008規(guī)定最小屈服強度≥345MPa的鋼帶，厚度偏差允許比該表規(guī)定值增加10%不等邊角鋼允許偏差GBT7062008冷軋鋼

12、板.鋼帶厚度允許偏差GBT7082006熱軋扁鋼截面尺寸允許偏差GB7022008（第2組）⑨型號尺寸（∠bbd）允許偏差mm邊寬度b邊厚度d型號尺寸（∠Bbd）允許偏差mm∠252530.80.4長邊寬B短邊寬b邊厚d公稱厚度mm厚度允許偏差(PT.A)寬度mm厚度mm∠25254∠634051.51.50.6公稱寬度mm尺寸允許偏差(普)尺寸允許偏差(普)∠30303∠75506≤1200＞1200~1500＞1500∠30304∠

13、7550810~500.51.03~160.20.4∠40403∠90566≤0.400.040.050.06∠40404∠90567＞0.40~0.600.050.060.0750~750.61.3∠40405∠90568＞0.60~0.800.060.070.08∠50505∠1006372.02.00.7＞0.80~1.000.070.080.0975~1000.91.816~601.0%2.5%∠636361.20.6∠1006

14、38＞1.00~1.200.080.090.10∠63638∠100808＞1.20~1.600.100.110.11100~1501.0%2.0%∠70706∠125807＞1.60~2.000.120.130.13∠70707∠125808＞2.00~2.500.140.150.15注：同一截面上任意兩點測量的厚度差不得大于厚度公差的50%.∠70708∠1258010＞2.50~3.000.160.170.17∠75756∠140

15、908＞3.00~4.00.170.190.19∠75757∠1409010最小屈服強度小于280MPa的厚度允許偏差應(yīng)符合該表規(guī)定值；最小屈服強度為280MPa~＜360MPa的厚度允許偏差比該表規(guī)定值增加20%；最小屈服強度為不小于360MPa的厚度允許偏差比該表規(guī)定值增加40%∠75758∠1409012∠80806∠160100102.52.51.0∠80807∠16010012∠80808∠18011010低壓流體輸送用焊接鋼

16、管的外徑、壁厚允許偏差GBT30912008⑤∠808010∠20012512∠90908∠20012514公稱口徑(近似內(nèi)徑)外徑(D)普通鋼管加厚鋼管∠909010不等邊角鋼每米彎曲≤3mm6.34號以上總彎曲≤總長度的0.30%不等邊角鋼不得有明顯扭轉(zhuǎn)。③mmin公稱尺寸mm允許偏差壁厚t理論質(zhì)量(kgm)壁厚t理論質(zhì)量(kgm)∠10010061.80.7公稱尺寸mm允許偏差公稱尺寸mm允許偏差∠1001007熱軋鋼板允許偏差G

17、BT7092006∠1001008DN618“φ10.2φ10.20.50mm2.010%t0.392.5010%t0.46∠10010010公稱厚度mm在下列寬度時厚度允許偏差mm（N類）DN814“φ13.52.52.50.622.802.800.73∠10010012≤15001500～25002500～40004000～4800DN1038“φ17.2φ17.22.52.50.322.802.800.97∠125125103.0

18、～5.00.450.550.65DN1512“φ21.32.82.81.263.503.501.45∠140140105.0～8.00.500.600.75DN2034“φ26.9φ26.92.82.81.633.502.01∠160160102.51.08.0～15.00.550.650.800.90DN251“φ33.7φ33.73.23.22.424.002.91∠1801801215.0～25.00.650.750.901.10

19、DN32114“φ42.4φ42.43.53.53.134.003.78∠1801801425.0～40.00.700.801.001.20DN40112“φ48.3φ48.33.53.844.504.504.58∠2002001440.0～60.00.800.901.101.30DN502“φ60.3φ60.31%D3.83.84.884.506.16∠2002001660.0～1000.901.101.301.50DN65212“φ

20、76.1φ76.14.04.06.644.507.88等邊角鋼頂端直角允許偏差90度50；等邊角鋼每米彎曲度不大于3mm，5號以上等邊角鋼總彎曲度不大于總長度的0.30%；等邊角鋼不得有明顯的扭轉(zhuǎn)。②100～1501.201.401.601.80DN803“φ88.9φ88.94.08.345.009.81150～2001.401.601.801.90DN1004“φ114.3φ114.34.010.855.0013.44200～250

21、1.601.802.002.20DN1255“φ139.7φ139.74.013.425.5018.24250～3001.802.002.202.40DN1506“φ168.3φ168.34.517.816.006.0021.63300～4002.002.202.402.60注:表中的公稱口徑是近似內(nèi)徑的名義尺寸并不等于公稱外徑減去兩個公稱壁厚所得的內(nèi)徑。圓鋼直徑和方鋼邊長允許偏差GBT7022008(3組)⑩結(jié)構(gòu)用無縫鋼管允許偏差GB

22、T81622008④GBT81622008④圓鋼直徑d方鋼邊長a允許偏差mm鋼管種類鋼管尺寸（mm）允許偏差熱軋（擠壓、擴）鋼管外徑D1%D或0.50mm，取其中較大值5.5~70.40冷軋（拔）鋼管1%D或0.30mm，取其中較大值7~200.40熱軋（擠壓）鋼管外徑DSD壁厚S允許偏差（mm）20~300.50≤10212.5%S或0.40mm，取其中較大值30~500.60＞102≤0.0515%S或0.40mm，取其中較大值50

23、~800.80＞0.05～0.112.5%S或0.40mm，取其中較大值80~1101.1＞0.112.5%S－10%S110~1501.4冷軋（拔）鋼管鋼管公稱壁厚（mm）允許偏差150~2002.0≤312.5%S－10%S或0.15，取其中較大值200~2803.0＞312.5%S－10%S備注：標注有①②③④⑤⑥⑦⑧⑨⑩①②③④⑤⑥⑦⑧⑨⑩序號的位置及紅字部分，為更改過的。重量計算公式：W=0.00785[hd2t（b–d）0.

24、349（R2–r2）]h=高，b=腿長，d=腰厚，t=平均腿厚，R=內(nèi)弧半徑，r=端弧半徑常用鋼鐵材料外形及尺寸允許偏差槽鋼允許偏差GBT7062008工字鋼允許偏差GBT7062008H型鋼允差GBT112632005花紋鋼GBT327791型號高度h腿寬b腰厚d平均腿厚t附：槽鋼平均腿厚[(bd)2處]的允許偏差為6%t；腰彎曲撓度不應(yīng)超過15%腰厚；外形每米彎曲度不大于3mm總彎曲度不大于長度的0.3%；槽鋼不得有明顯的扭轉(zhuǎn)。型號

25、高度h腿寬b腰厚d平均腿厚度t允許偏差mm高度H寬度B腹板厚t1翼緣厚t2規(guī)格尺寸mm允許偏差mm高度h腿寬b腰厚d常用規(guī)格尺寸mm尺寸允許偏差mm基本厚度mm基本厚度允許偏差mm[550374.57.01.51.50.4I10100684.57.62.02.00.5HW10010068高度H＜4002.0≥400~＜6003.0≥6004.0寬度B＜100，2.0≥100~＜2002.5≥2003.0厚度t1＜50.5≥5~＜160.

26、7≥16~＜251.0≥25~＜401.5≥402.0厚度t2＜50.7≥5~＜161.0≥16~＜251.5≥25~＜401.7≥402.0長度≤8m時允許偏差(0~50)長度＞8m時允許偏差（0~80）[6.363404.87.5I12120745.08.4HW1251256.59[6.565404.37.5I12.6126745.08.4HW1501507102.50.3[880435.08.0I14140805.59.1HW17

27、51757.5113.0[10100485.38.52.02.00.5I16160886.09.92.5HW2002008123.5[12120535.59.0I18180946.510.7HW20020412124.00.4[12.6126535.59.0I20a2001007.011.43.03.00.7HW2502509144.5[14a140586.09.5I20b2001029.011.4HW30030010155.00.40

28、.5[14b140608.09.5I22a2201107.512.3HW40040013215.5[16a160636.510.02.02.50.5⑥I22b2201129.512.3HW40040821216.00.50.6[16160658.510.0I24a2401168.013.0HW4144051828[18a180687.010.5I24b24011810.013.0HW35035012197.00.60.7[1818070

29、9.010.5I25a2501168.013.0HN7003001324[20a200737.011.03.03.00.7I25b25011810.013.0HN2001005.588.00.60.8[20200759.011.0I27a2701228.513.7HN3001506.59[22a220777.011.5I27b27012410.513.7HN350175711注：花紋紋高不小于基板厚度的0.2倍[22220799.011

30、.5I28a2801228.513.7HN5002001016[24a240787.012.0I28b28012410.513.7鋼帶（包括連軋鋼板）GBT7092006[24b240809.012.0I30a3001269.014.43.50.8[24c2408211.012.0I30b30012811.014.4公稱厚度mm在下列寬度時厚度允許偏差（PT.A）mm[25a250787.012.0I30c30013013.014.4[

31、25b250809.012.0I32a3201309.515.0600～12001200～15001500～18001800[25c2508211.012.0I32b32013211.515.0[27a270827.512.5I32c32013413.515.00.8～1.50.150.17[27b270849.512.5I36a36013610.015.81.5～2.00.170.190.21[27c2708611.512.5I36b

32、36013812.015.82.0～2.50.180.210.230.25[28a280827.512.5I36c36014014.015.82.5～3.00.200.220.240.26[28b280849.512.5I40a40014210.516.54.0⑦4.00.93.0～4.00.220.240.260.27[28c2808611.512.5I40b40014412.516.54.0～5.00.240.260.280.29[

33、30a300857.513.5I40c40014614.516.55.0～6.00.260.280.290.31[30b300879.513.5I45a45015011.518.06.0～8.00.290.300.310.35[30c3008911.513.5I45b45015213.518.08.0～10.00.320.330.340.40[40a40010010.5184.04.00.9①4.04.00.9①I45c45015415

34、.518.010.0～12.50.350.360.370.43[40b40010212.518工字鋼腿平均厚度[(bd)4處]的允許偏差為6%t；腰彎曲撓度不應(yīng)超過15%腰厚；外形彎曲每米≤2mm，總長彎曲≤總長度的0.2%；工字鋼不得有明顯扭轉(zhuǎn)。⑧12.5～15.00.370.380.400.46[40c40010414.51815.0～25.40.400.420.450.50等邊角鋼允差GBT7062008規(guī)定最小屈服強度≥345M

35、Pa的鋼帶，厚度偏差允許比該表規(guī)定值增加10%不等邊角鋼允許偏差GBT7062008冷軋鋼板.鋼帶厚度允許偏差GBT7082006熱軋扁鋼截面尺寸允許偏差GB7022008（第2組）⑨型號尺寸（∠bbd）允許偏差mm邊寬度b邊厚度d型號尺寸（∠Bbd）允許偏差mm∠252530.80.4長邊寬B短邊寬b邊厚d公稱厚度mm厚度允許偏差(PT.A)寬度mm厚度mm∠25254∠634051.51.50.6公稱寬度mm尺寸允許偏差(普)尺寸允

36、許偏差(普)∠30303∠75506≤1200＞1200~1500＞1500∠30304∠7550810~500.51.03~160.20.4∠40403∠90566≤0.400.040.050.06∠40404∠90567＞0.40~0.600.050.060.0750~750.61.3∠40405∠90568＞0.60~0.800.060.070.08∠50505∠1006372.02.00.7＞0.80~1.000.070.080

37、.0975~1000.91.816~601.0%2.5%∠636361.20.6∠100638＞1.00~1.200.080.090.10∠63638∠100808＞1.20~1.600.100.110.11100~1501.0%2.0%∠70706∠125807＞1.60~2.000.120.130.13∠70707∠125808＞2.00~2.500.140.150.15注：同一截面上任意兩點測量的厚度差不得大于厚度公差的50%.∠

38、70708∠1258010＞2.50~3.000.160.170.17∠75756∠140908＞3.00~4.00.170.190.19∠75757∠1409010最小屈服強度小于280MPa的厚度允許偏差應(yīng)符合該表規(guī)定值；最小屈服強度為280MPa~＜360MPa的厚度允許偏差比該表規(guī)定值增加20%；最小屈服強度為不小于360MPa的厚度允許偏差比該表規(guī)定值增加40%∠75758∠1409012∠80806∠160100102.52

39、.51.0∠80807∠16010012∠80808∠18011010低壓流體輸送用焊接鋼管的外徑、壁厚允許偏差GBT30912008⑤∠808010∠20012512∠90908∠20012514公稱口徑(近似內(nèi)徑)外徑(D)普通鋼管加厚鋼管∠909010不等邊角鋼每米彎曲≤3mm6.34號以上總彎曲≤總長度的0.30%不等邊角鋼不得有明顯扭轉(zhuǎn)。③mmin公稱尺寸mm允許偏差壁厚t理論質(zhì)量(kgm)壁厚t理論質(zhì)量(kgm)∠10010

40、061.80.7公稱尺寸mm允許偏差公稱尺寸mm允許偏差∠1001007熱軋鋼板允許偏差GBT7092006∠1001008DN618“φ10.2φ10.20.50mm2.010%t0.392.5010%t0.46∠10010010公稱厚度mm在下列寬度時厚度允許偏差mm（N類）DN814“φ13.52.52.50.622.802.800.73∠10010012≤15001500～25002500～40004000～4800DN1038

41、“φ17.2φ17.22.52.50.322.802.800.97∠125125103.0～5.00.450.550.65DN1512“φ21.32.82.81.263.503.501.45∠140140105.0～8.00.500.600.75DN2034“φ26.9φ26.92.82.81.633.502.01∠160160102.51.08.0～15.00.550.650.800.90DN251“φ33.7φ33.73.23.22

42、.424.002.91∠1801801215.0～25.00.650.750.901.10DN32114“φ42.4φ42.43.53.53.134.003.78∠1801801425.0～40.00.700.801.001.20DN40112“φ48.3φ48.33.53.844.504.504.58∠2002001440.0～60.00.800.901.101.30DN502“φ60.3φ60.31%D3.83.84.884.506

43、.16∠2002001660.0～1000.901.101.301.50DN65212“φ76.1φ76.14.04.06.644.507.88等邊角鋼頂端直角允許偏差90度50；等邊角鋼每米彎曲度不大于3mm，5號以上等邊角鋼總彎曲度不大于總長度的0.30%；等邊角鋼不得有明顯的扭轉(zhuǎn)。②100～1501.201.401.601.80DN803“φ88.9φ88.94.08.345.009.81150～2001.401.601.801.

44、90DN1004“φ114.3φ114.34.010.855.0013.44200～2501.601.802.002.20DN1255“φ139.7φ139.74.013.425.5018.24250～3001.802.002.202.40DN1506“φ168.3φ168.34.517.816.006.0021.63300～4002.002.202.402.60注:表中的公稱口徑是近似內(nèi)徑的名義尺寸并不等于公稱外徑減去兩個公稱壁厚所得

45、的內(nèi)徑。圓鋼直徑和方鋼邊長允許偏差GBT7022008(3組)⑩結(jié)構(gòu)用無縫鋼管允許偏差GBT81622008④GBT81622008④圓鋼直徑d方鋼邊長a允許偏差mm鋼管種類鋼管尺寸（mm）允許偏差熱軋（擠壓、擴）鋼管外徑D1%D或0.50mm，取其中較大值5.5~70.40冷軋（拔）鋼管1%D或0.30mm，取其中較大值7~200.40熱軋（擠壓）鋼管外徑DSD壁厚S允許偏差（mm）20~300.50≤10212.5%S或0.40mm

46、，取其中較大值30~500.60＞102≤0.0515%S或0.40mm，取其中較大值50~800.80＞0.05～0.112.5%S或0.40mm，取其中較大值80~1101.1＞0.112.5%S－10%S110~1501.4冷軋（拔）鋼管鋼管公稱壁厚（mm）允許偏差150~2002.0≤312.5%S－10%S或0.15，取其中較大值200~2803.0＞312.5%S－10%S備注：標注有①②③④⑤⑥⑦⑧⑨⑩①②③④⑤⑥⑦⑧⑨⑩