Q/BQBQ/BQB408—Lowcarboncold-rolledsteelsheetandstripforcold 發(fā)布Q/BQB GB/T1.1—2020JISG3141:2021，EN10130:2006，JFSA2001:2014Q/BQB408—2021Q/BQB408—20214；7.3；7.4；本文件主要起草人：袁敏。Q/BQB408—1988，Q/BQB408—1994，Q/BQB408—1999，Q/BQB408—2003，Q/BQB408—2009，Q/BQB408—2014,Q/BQB408—2018，Q/BQB408—2019,Q/BQB408—2021。Q/BQBQ/BQBQ/BQBQ/BQB0.17mm～3.5mmGB/T228.1-202111金屬材料1rnGB/TQ/BQBQ/BQB DC01/SPCC/SPCC-XS/SPCC-XM/SPCC-XL/DC03/SPCD/DC04/SPCE/DC05/SPCF/DC06/SPCG/SPCCQ/BQB401SPCCQ/BQB401260MPa化學(xué)成分a(熔煉分析 %(質(zhì)量分數(shù)SPCC/SPCC-XSa %(質(zhì)量分數(shù)DC01DC03DC04≤0.20≤0.20≤0.20aNbTibNbTiNbTi0.20化學(xué)成分(熔煉分析 %(質(zhì)量分數(shù)BLCBLD≤0.20≤0.20≤0.20a允許添加NbTib允許用NbTiNbTi0.20%68910891011r公稱厚度公稱厚度aRR 40MPa。cGB/T228.1P17d厚度＜0.5mm1.6mm，rer＝(r+2r+r4 45SPCC-XMSPCC-XLaRR bGB/T228.1P17c對SPCC-XMSPCC-XL2.3mm160MPaQ/BQBQ/BQBQ/BQBQ/BQBrb,cnb,c屈服強度a無明顯屈服時采用 bGB/T228.1P6crn0.50mm2.0～2.3mmr0.2 ＞2.3～2.5mmr900.4,當(dāng)產(chǎn)品厚度＞2.5mm，r90rb,cnb,c屈服強度a當(dāng)屈服現(xiàn)象不明顯時采用 RP0.2，否則采用bGB/T228.1P17 SPCC/SPCC-XS/SPCC-XM/SPCC-DC01/3DC03/DC04/SPCD/SPCE/6DC05/DC06/DC07SPCF/SPCGBUSD/BUFD/產(chǎn)品兩面中較好的一面無肉眼可見的明顯缺欠，另一面至少應(yīng)達到FB的缺欠，另一面至少應(yīng)達到FB3%。如用戶有特殊要求，可在訂貨時商議確定。14平均粗糙度注30.00083×c（mm/s（c0.05c（mm/min；10%Ag。Q/BQBQ/BQBQ/BQBQ/BQBGB/TGB/TGB/T228.1-2021rGB/T5027應(yīng)變硬化指數(shù)(nGB/T5028GB/TGB/TGB/TGB/T對于拉伸試驗、應(yīng)變硬化指數(shù)(nrQ/BQB400GB/T8170A.1硬度(HVA.2度(HR30THR15T)或維氏硬度(HVAA.3A.4A.5HRB。A.2HRBSHRBWaHRBHRBSHRBWHRBWA.3HR30TS換算為換算為換算為換算為A.4HR15TS換算為aHR15TS93.0HRBS99.7HRBSA.5HVH