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1. 发明专利

JP2011246744A Galvannealed cold rolled steel sheet and method for producing the same 有权
标题翻译：高速冷轧钢板及其制造方法
公开(公告)号：JP2011246744A
公开(公告)日：2011-12-08
申请号：JP2010118641
申请日：2010-05-24
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： FURUHASHI SEIJI , OKADA HIKARI , KAWANISHI YOSHIHIRO , ISHIGAKI HAJIME , HAYASHI KOTARO , FUJINAKA SHINGO , MIYAHARA KICHIHEI
IPC分类号： C23C2/06 , C21D9/46 , C22C38/00 , C22C38/06 , C22C38/60 , C23C2/02 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a galvannealed cold rolled steel sheet having a uniform galvannealed layer which has a good surface property using as a substrate a cold rolled steel sheet containing an easily oxidizable element in a large amount, and to provide a method for producing the same.SOLUTION: The cold rolled steel sheet includes a chemical composition which contains, in mass%, 0.02% or more and 0.25% or less C, 0.01% or more and 2.5% or less Si, 0.5% or more and 3.5% or less Mn, 0.1% or less P, 0.01% or less S, 1.0% or less sol. Al, and 0.01% or less N. In the galvannealed layer, the mass per unit area is 10 g/mor more and 80 g/mor less; the alloying degree is 7 mass% or more and 16 mass% or less; and the distribution of plating thickness satisfies the formula: d/d≤2.5, wherein dis the maximum plating thickness; and dis the average plating thickness.
摘要翻译：要解决的问题：提供一种具有均匀合金化热浸镀层的合金化热浸镀冷轧钢板，其具有良好的表面性能，使用含有大量容易氧化的元素的冷轧钢板作为基材，并提供一种其制造方法解决方案：冷轧钢板包括以质量％计含有0.02％以上且0.25％以下的C，0.01％以上且2.5％以下的Si，0.5％以上且3.5％以下的化学组成，或更少的Mn，0.1％以下的P，0.01％以下的S，1.0％以下的溶胶。 Al和0.01％以下N。在合金化热浸镀层中，每单位面积的质量为10g / m 2以上且80g / m 2以上SP SP =“POST “> 2 或更少; 合金化度为7质量％以上16质量％以下。并且电镀厚度的分布满足以下公式：d max / d 0 ≤2.5，其中d max 是最大电镀厚度; 而平均电镀厚度d 0 。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2012206154A Interval pitch control method, hot rolling apparatus and hot rolling method 审中-公开
标题翻译：间歇式搅拌控制方法，热轧设备和热轧方法
公开(公告)号：JP2012206154A
公开(公告)日：2012-10-25
申请号：JP2011075458
申请日：2011-03-30
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： SAKAMOTO KOICHI , WASHIKITA YOSHIRO , OKADA HIKARI
IPC分类号： B21B37/00
摘要： PROBLEM TO BE SOLVED: To provide an interval pitch control method by which a stock to be rolled can be approximated to the optimum interval pitch when the extracting timing of the stock to be rolled from a heating furnace is delayed.SOLUTION: In a method for adjusting the interval pitch on a hot rolling line which includes a plurality of the heating furnaces and conveying tables for conveying the stock to be rolled extracted from those heating furnaces, the conveying tables are changeable in conveying speed, an extracting time of the stock to be rolled from the heating furnaces is determined by planning beforehand the interval pitch by the time or the distance so that the tail end of a preceding stock to be rolled and the nose of a following stock to be rolled are prevented from colliding in the hot rolling line. At normal time, the extracting time is determined under the condition that the stock to be rolled is conveyed at a set speed which is lower than the upper limit speed conveyable with the conveying table, and when the extracting time of the stock to be rolled gets behind the determined time, the delay is recovered by conveying the stock to be rolled by operating the conveying tables at faster speed than that of the normal time.
摘要翻译：要解决的问题：提供一种间隔间距控制方法，当从加热炉轧制的坯料的提取时间延迟时，可以将待轧制的坯料近似为最佳间隔间距。解决方案：在一种用于调节热轧生产线上间隔间距的方法中，包括多个加热炉和输送台，用于输送从这些加热炉抽出的待轧材料，输送台可以在输送速度从加热炉中轧制的坯料的提取时间是通过预先规定间隔间距的时间或距离来确定的，使得要轧制的前期坯料的尾端和待轧制的后续坯料的前端防止在热轧生产线上碰撞。在通常的时候，提取时间是在待轧材质以低于输送台输送的上限速度的设定速度传送的条件下被确定的，当待轧制坯料的提取时间在确定的时间之后，通过以比正常时间更快的速度操作输送台来输送要轧制的坯料来恢复延迟。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2012012683A Method for manufacturing hot dip galvanized steel sheet 审中-公开
标题翻译：制造热镀锌钢板的方法
公开(公告)号：JP2012012683A
公开(公告)日：2012-01-19
申请号：JP2010151855
申请日：2010-07-02
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： IKEDA KEITA , OKADA HIKARI , NAGAI NORIKI , ISHIGAKI HAJIME , NAKAMURA TOYOMITSU , KAWANISHI YOSHIHIRO , TOKI TAMOTSU , TAKAYAMA TORU
IPC分类号： C23C2/06 , C21D9/46 , C22C18/00 , C22C38/00 , C22C38/06 , C22C38/58 , C23C2/02 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a Si-containing high strength hot dip galvanized steel sheet having excellent surface properties by making Si oxide harmless, which inhibits reaction of the steel sheet and zinc during hot-dip galvanizing.SOLUTION: A steel sheet containing at least 0.2-2.0% of Si, 0.2-3.0% of Mn, and 0.001-1.5% of Al so that the ratios of Si, Mn and Al satisfy formulas (1) to (3) is continuously subjected to a hot dip galvanizing treatment in a hot dip galvanizing line having a reducing furnace, wherein the logarithm ratio of steam partial pressure to hydrogen partial pressure in the atmospheric gas in a heating furnace or a heat keeping furnace satisfies formula (4): (1) 28≤(Si/(Si+Mn+Al))×100≤54; (2) 30≤(Mn/(Si+Mn+Al))×100≤70; (3) 0≤(Al/(Si+Mn+Al))×100≤30; and (4) -1.39≤log(P/P)≤-0.695.
摘要翻译：待解决的问题：提供一种通过使Si氧化物无害化而制造具有优异表面性质的含Si高强度热浸镀锌钢板的方法，其抑制了热镀锌期间钢板和锌的反应。解决方案：含有Si：0.2-2.0％，Mn：0.2-3.0％，Al：0.001-1.5％的钢板，使Si，Mn和Al的比例满足式（1）〜（3））在具有还原炉的热浸镀锌线中连续进行热浸镀锌处理，其中加热炉或保温炉中的气氛气体中的蒸汽分压与氢分压的对数比满足公式（4 ）：（1）28≤（Si /（Si + Mn + Al））×100≤54; （2）30≤（Mn /（Si + Mn + Al））×100≤70; （3）0≤（Al /（Si + Mn + Al））×100≤30; 和（4）-1.39≤log（P H2O / P H2 ）≤-0.695。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2010069527A Mold flux for continuous casting of high aluminum steel and method of manufacturing cast slab 有权
标题翻译：高铝连续铸造用模具及其制造方法
公开(公告)号：JP2010069527A
公开(公告)日：2010-04-02
申请号：JP2008242898
申请日：2008-09-22
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： TSUKAGUCHI YUICHI , HANAO MASAHITO , KAWAMOTO MASAYUKI , OTA KOZO , MIZUNO YASUHIRO , FUJINAKA SHINGO , OKADA HIKARI
IPC分类号： B22D11/108 , B22D11/00 , C21C7/076
CPC分类号： Y02P10/242
摘要： PROBLEM TO BE SOLVED: To stably carry out casting when continuously casting high aluminum steel with a sol.Al concentration of ≥0.1 mass% and to sufficiently remove scales immediately after hot rough rolling. SOLUTION: Mold flux is used for continuous casting of ordinary steel having the sol.Al concentration of 0.1-1.5 mass%, a Si concentration of 0.3-2.0 mass%, and a C concentration of 0.05-0.18 mass%. The mold flux has a ratio (CaO/SiO 2 ) of 1.0-2.0 obtained by dividing a CaO content by a SiO 2 content, contains one or two kinds of 1.0-8.0 mass% of P 2 O 5 and 0.5-5.0 mass% of B 2 O 3 , has a solidification temperature of 1,050-1,200°C and a viscosity of 0.5-2.5 dPa s at 1,300°C, and has cuspidine as a main crystal phase in a sample at a normal temperature where once-melted flux is cooled at a temperature-falling rate of 10°C per min. When the high aluminum steel with the sol. Al concentration of ≥0.1 mass% is continuously cast, scale removal by high pressure water or the like is accelerated, and hot rolled steel sheet having reduced insular scales is obtained. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：在溶胶浓度≥0.1质量％的高铝钢连续铸造时，为了稳定地进行铸造，在热轧后立即充分除去鳞屑。解决方案：模具焊剂用于连续铸造溶胶.Al浓度为0.1-1.5质量％，Si浓度为0.3-2.0质量％，C浓度为0.05-0.18质量％的普通钢。模具助熔剂通过将CaO含量除以SiO 2 含量而获得的1.0-2.0的比例（CaO / SiO 2 SB 2> / SB）含有一种或两种1.0- 8.0质量％的P 2 5 和0.5-5.0质量％的B 2 3 ，具有固化温度为1,050-1200℃，在1300℃下的粘度为0.5-2.5dPa·s，并且在常温下将样品中的尖晶石作为主晶相，其中一次熔化的熔剂以降温速率冷却每分钟10°C 当高铝钢与溶胶。连续铸造Al浓度≥0.1质量％，通过高压水等进行除垢加工，得到具有减小的鳞片的热轧钢板。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2008156378A Steel material for laser cutting and coating material composition thereof 有权
标题翻译：用于激光切割和涂层材料组合物的钢材
公开(公告)号：JP2008156378A
公开(公告)日：2008-07-10
申请号：JP2006343121
申请日：2006-12-20
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： KAMIMURA TAKAYUKI , FUJIWARA TOMOYA , MAEDA TAKAO , KUBO SATOSHI , OKADA HIKARI
IPC分类号： C09D183/00 , B23K26/38 , B23K103/16 , C09D5/10 , C09D7/12 , C23C22/17
摘要： PROBLEM TO BE SOLVED: To improve a cutting speed in cutting a steel material subjected to primary rustproofing by laser cutting with a zinc primer coating by a high power laser cutter and to prevent occurrence of cutting suspension accident so as to enable a night unattended operation. SOLUTION: The surface of a steel material is coated with a coating material composition comprising (a) an alkoxysilane containing two or more alkoxy groups and/or its hydrolysate or condensate (e.g. a tetraalkoxysilane), (b) zinc powder, (c) zinc phosphate powder and optionally an extender pigment such as aluminosilicate, SiO 2 , etc. to form a dried coating film having a film thickness of >9 μm and ≤25 μm. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提高通过高功率激光切割机用锌底漆涂层对通过激光切割进行一级防锈的钢材的切割速度，并且防止发生切割悬挂事故以使得能够进行夜间无人看管的操作。钢材的表面涂覆有涂料组合物，其包含（a）含有两个或更多个烷氧基的烷氧基硅烷和/或其水解产物或缩合物（例如四烷氧基硅烷），（b）锌粉，（ c）磷酸锌粉末和任选的增量颜料如硅铝酸盐，SiO 2 等，以形成膜厚>9μm和≤25μm的干燥涂膜。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2008156377A Steel material for laser cutting and coating material composition thereof 有权
标题翻译：用于激光切割和涂层材料组合物的钢材
公开(公告)号：JP2008156377A
公开(公告)日：2008-07-10
申请号：JP2006343120
申请日：2006-12-20
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： KAMIMURA TAKAYUKI , FUJIWARA TOMOYA , MAEDA TAKAO , KUBO SATOSHI , OKADA HIKARI
IPC分类号： C09D183/00 , B32B15/08 , C09D7/12
摘要： PROBLEM TO BE SOLVED: To improve a cutting speed in cutting a steel material subjected to primary rustproofing by a zinc primer coating by laser cutting with a high power laser cutter and to prevent occurrence of cutting suspension accident so as to enable a night unattended operation.
SOLUTION: The surface of a steel material is coated with a coating material composition comprising (a) an alkoxysilane containing two or more alkoxy groups and/or its hydrolysate or condensate (e.g. a tetraalkoxysilane), (b) zinc powder and (c) aluminum phosphate (preferably aluminum tripolyphosphate) powder or mixed powder of aluminum phosphate and zinc phosphate to form a dried coating film having a film thickness of >9 μm and ≤25 μm.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：通过用大功率激光切割机进行激光切割，提高用锌底漆涂层进行一次防锈的钢材的切割速度，防止发生切割悬浮事故，使夜间无人看管的操作。钢材的表面涂覆有涂料组合物，其包含（a）含有两个或更多个烷氧基的烷氧基硅烷和/或其水解产物或缩合物（例如四烷氧基硅烷），（b）锌粉和（ c）磷酸铝（优选三聚磷酸铝）粉末或磷酸铝和磷酸锌的混合粉末，形成膜厚>9μm和≤25μm的干燥涂膜。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2008106321A Galvannealed steel sheet and its manufacturing method 有权
标题翻译： GALVANNEALE钢板及其制造方法
公开(公告)号：JP2008106321A
公开(公告)日：2008-05-08
申请号：JP2006291389
申请日：2006-10-26
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： NOMURA SHIGEKI , OKADA HIKARI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/14 , C22C38/60 , C23C2/06 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To prevent the deterioration of surface properties caused by a striped pattern notably appearing in a galvannealed steel sheet for automotive panel use in which a Ti-containing extra-low-carbon steel sheet with high formability is used as a basis material. SOLUTION: The steel sheet has a chemical composition containing, by mass, ≤0.0038% C, ≤0.20% Si, 0.03 to 0.2% Mn, ≤0.03% P, ≤0.03% S, 0.010 to 0.23% Al, ≤0.0040% N, ≥0.003% Ti and 0.021 to 0.05% Nb and further containing ≤0.0020% B if necessary. Further, with respect to the Ti content in this chemical composition, Mn/äS-(32/48)×Ti*}≥14 is satisfied and also any of the following conditions (1) to (3) are satisfied: (1) Ti≤0.014% is satisfied; (2) S-(32/48)×Ti*≤0 is satisfied (where Ti* satisfies Ti*=Ti-(48/14)×N and also satisfies Ti*=0 when Ti*≤0); and (3) Ti≤(48/14)×N+(48/32)×S is satisfied. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题为了防止由于使用具有高成形性的含Ti的超低碳钢板而使用的汽车用面板的合金化热浸镀锌钢板中显着出现的条纹图案引起的表面性质的劣化，基础材料。解决方案：钢板具有以质量％计含有不超过0.0038％C，≤0.20％Si，0.03-0.2％Mn，≤0.03％P，≤0.03％S，0.010-0.23％Al，≤ 0.0040％N，≥0.003％Ti，0.021〜0.05％Nb，如果需要还含有≤0.0020％B。此外，关于该化学组成中的Ti含量，满足Mn /äS-（32/48）×Ti *}≥14，并且满足以下条件（1）至（3）中的任一个：（1） Ti≤0.014％满足; （2）S（32/48）×Ti *≤0（Ti *满足Ti * = Ti-（48/14）×N，Ti *≤0时也满足Ti * = 0）和（3）Ti≤（48/14）×N +（48/32）×S。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2007211334A High-tensile hot-rolled steel sheet and its manufacturing method 有权
标题翻译：高强度热轧钢板及其制造方法
公开(公告)号：JP2007211334A
公开(公告)日：2007-08-23
申请号：JP2006035604
申请日：2006-02-13
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： SATO NAOHIRO , KIKUCHI SUKEHISA , OKADA HIKARI
IPC分类号： C22C38/00 , B21B3/00 , B21B45/00 , C21D9/46 , C22C38/16 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-tensile hot-rolled steel sheet having a tensile strength of 590 MPa or higher, and superior in ductility, bending workability, fatigue characteristic, and surface properties.
SOLUTION: The high-tensile hot-rolled steel sheet has a steel composition in mass% of C: more than 0.01% to 0.25%, Si: more than 0.2% to less than 1.0%, Mn: 0.5 to 2.5%, P: 0.005% to less than 0.03%, Cu: 0.005% to less than 0.045%, S: 0.02% or less, Al: 0.005% to 1.0%, N: 0.01% or less, O: 0.0010% to 0.0100% or less, where the content of Cu, P, and O satisfies formula (1): 0.4≤Cu/(P+O)≤3.0, and balanced Fe with inevitable impurities; and the structure of steel comprises 50-95 area% of ferrite and balanced second phase, and the average crystal grain size of the ferrite is 3-20 μm, the average crystal grain size of the second phase is 1.0-8 μm and its average grain distance is 2-10 μm, and the second phase comprises 5-50 area% of martensite based on the whole of structure of steel and insular defects of maximum length of 5 mm or larger is 10% or less in area% on the steel sheet surface.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供拉伸强度为590MPa以上的高拉伸热轧钢板，延展性，弯曲加工性，疲劳特性和表面性能优异。解决方案：高强度热轧钢板具有以下质量％的钢组成：大于0.01％至0.25％，Si：大于0.2％至小于1.0％，Mn：0.5至2.5％，P：0.005〜小于0.03％，Cu：0.005〜小于0.045％，S：0.02％以下，Al：0.005〜1.0％，N：0.01％以下，○：0.0010％〜0.0100％以下，Cu，P，O的含量满足公式（1）：0.4≤Cu/（P + O）≤3.0，平衡Fe与不可避免的杂质; 钢的结构包含50-95面积％的铁素体和平衡的第二相，铁素体的平均晶粒尺寸为3-20μm，第二相的平均晶粒尺寸为1.0-8μm，平均晶粒尺寸为晶粒距离为2-10μm，第二相为基于整体钢结构的5-50面积％的马氏体，最大长度为5mm以上的岛状缺陷为钢板面积％的10％以下片材表面。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2006152341A High strength hot rolled sheet steel and its production method 有权
标题翻译：高强度热轧钢板及其生产方法
公开(公告)号：JP2006152341A
公开(公告)日：2006-06-15
申请号：JP2004342151
申请日：2004-11-26
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： TANAKA YASUAKI , TOMITA TOSHIRO , IMAI NORIO , OKADA HIKARI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive hot rolled steel sheet which has tensile strength of ≥590MPa and excellent ductility, and stretch-flanging properties, is free of island-shaped scale flaws and red scale on a steel sheet surface, and a production method therefor.
SOLUTION: The hot rolled steel sheet is composed of 0.02 to 0.18% C, 0.01 to 1.5% Si, 0.2 to 2.0% Mn, ≤0.10 P, ≤0.07% S, 0.02 to 2.0% Al, ≤0.01% N, 0.01 to 0.3% Ti, and 0.01 to 0.1% Nb, and if necessary, further 0.0010 to 0.0070% Ca and/or 0.0010 to 0.0070% Mg and the balance Fe and impurities, and the ferrite has an area rate of ≥90%, tensile strength of ≥590 MPa, and the product of the tensile strength (MPa) and a pore expanding rate (%)is ≥650,000 MPax%. At the time of production, the steel is subjected to crude hot rolling after turning to a specified temperature T
SRT . The obtained crude bar is subjected to descaling at the specified temperature T
SRT .
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：待解决的问题：为了提供一种廉价的热轧钢板，其拉伸强度≥590MPa，优异的延展性和拉伸凸缘性，在钢板表面上没有岛状鳞屑和红色鳞片，及其制造方法。解决方案：热轧钢板由0.02〜0.18％C，0.01〜1.5％Si，0.2〜2.0％Mn，≤0.10P，≤0.07％S，0.02〜2.0％Al，≤0.01％N ，0.01〜0.3％的Ti和0.01〜0.1％的Nb，如果需要，还含有0.0010〜0.0070％的Ca和/或0.0010〜0.0070％的Mg，余量为Fe和杂质，铁素体的面积率为≥90％拉伸强度≥590MPa，拉伸强度（MPa）和孔膨胀率（％）的乘积≥6.5万MPax％。在制造时，在转到规定温度T SB SB 之后对钢进行粗热轧。将得到的粗棒在规定温度T SB SB 下进行除鳞。版权所有（C）2006，JPO＆NCIPI

10. 发明专利

JP2009275256A Hot rolled steel sheet and method for producing the same 审中-公开
标题翻译：热轧钢板及其制造方法
公开(公告)号：JP2009275256A
公开(公告)日：2009-11-26
申请号：JP2008127218
申请日：2008-05-14
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： TAKAHASHI HIROYUKI , TANAKA YASUAKI , OKADA HIKARI
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide a high strength hot rolled steel sheet having excellent ductility, stretch flange formability and surface properties while having high tensile strength of ≥590 MPa, and to provide a method for producing the same.
SOLUTION: The hot rolled steel sheet has a chemical composition comprising, by mass, 0.02 to 0.05% C, 0.6 to 1.0% Si, 0.8 to 1.5% Mn, ≤0.05% P, ≤0.005% S, 0.10 to 1.0% Al, ≤0.01% N, 0.01 to 0.10% Ti, 0.01 to 0.10% Nb and 0.001 to 0.005% Ca, and the balance Fe with impurities, has a steel structure comprising ferrite of ≥93% by area ratio, has mechanical properties in which tensile strength is ≥590 MPa, a product (TS×El value) between the tensile strength (MPa) and the total elongation (%):≥17,500 MPa×% and a product (TS×λ value) between the tensile strength (MPa) and hole expansion ratio(%): ≥72,000 MPa×%, and has surface properties in which the area ratio of insular scale flaws with the maximum length of ≥5 mm is ≤5% in the surface of the steel sheet.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供具有优异的延展性，拉伸凸缘成形性和表面性能，同时具有≥590MPa的高拉伸强度的高强度热轧钢板，并提供其制造方法。解决方案：热轧钢板具有质量分数为0.02〜0.05％，Si：0.6〜1.0％，Mn：0.8〜1.5％，≤0.05％P，≤0.005％S，0.10〜1.0 ％Al，≤0.01％N，0.01〜0.10％Ti，0.01〜0.10％Nb和0.001〜0.005％Ca，余量为Fe与杂质，具有包含≥93％面积比的铁素体的钢结构，具有机械性能拉伸强度≥590MPa，拉伸强度（MPa）与总伸长率（％）之间的乘积（TS×El值）：≥17500MPa×％和拉伸强度（TS×λ值）（MPa）和孔膨胀率（％）：≥72,000MPa×％，具有在钢板表面上最大长度≥5mm的岛状瑕疵面积率≤5％的表面特性。版权所有（C）2010，JPO＆INPIT

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