出口X46M管线钢热轧卷板技术条件.doc

RMTL-ONGC-MEHSANA出口X46M管线钢热轧卷板技术条件X46M Technical agreement between JINGTANG and RATNAMANI1 范围SCOPE本技术条件规定了*出口X46M的热轧板卷的技术要求。热轧适合制造螺旋埋弧输气钢管，所制钢管将用于石油天然气公司的天然气管道工程。具体规格和卷重范围见下表。ThicknessWidthWeightQtyTolerance on Quantity溢短装要求MinMax7.1103518.6320.7275- 0 / + 8%7.9103518.6320.71530- 2.5% / + 2.5%8.4103518.6320.7660- 2.5% / + 2.5% 8.7113520.4322.71720- 2.5% / + 2.5%9.5113520.4322.750- 0 / + 30%7.1139025.0227.8920- 2.5% / + 2.5%7.9139025.0227.825- 0 / + 20%2 规范性引用文件STANDARD REF.API 5L 45th Edition PSL2 管线钢规范第45版PSL2ASTM A751 钢产品化学分析的试验方法、步骤和定义ASTM A370 钢产品机械性能试验的方法与定义ASTM E23 金属材料缺口冲击试验方法ASTM E92 金属材料维氏硬度标准试验方法ASTM E112 平均晶粒度的标准测定法3 制造要求Manufacture Requirement1）需采用氧气转炉或电炉炼钢。1) The steel shall be made from basic oxygen or electric arc furnace steel making process.2）需为镇静钢，并能得到良好的晶粒。2) The steel shall be fully killed & fine grained .3）只可采用连铸方式生产板坯。3) The steel shall be made by continuous casting only.4）轧钢采用热机械轧制。4) The steel shall be Thermo mechanically control rolled.5）成品钢卷的生产应采用调制或者控制轧制或控制轧制和加速冷却的结合来得到良好的晶粒组织。5) The steel shall be quenched and tempered or controlled rolled or combined controlled rolled and accelerated cooled to impart uniformly fine grain structure to the finished steel.6）板坯两边应采用火焰清扫的方式检查来保证没有分层、内部气泡、结疤、裂纹、凹坑等缺陷。6)Both sides of slabs shall be hot scarfed & visually inspected to produce defect free surface such as lamination, internal blisters, scores, cracks, pits etc.7）每炉次最少卷数要求：6卷/炉（允许3%的量不符合此要求）7) Minimum quantity of HR Coil per heat：Minimum 4 HRC/Heat（Allow 5% of the order is out of range）4 材料质量及探伤 Material quality & NDT1）中心偏析评级按“YBT 4003-1997 连铸钢板坯低倍组织缺陷评级图”进行，保证C类1.5级。1) The grade of centerline segregation is according to “YB/T 4003-1997 Standard diagrams for macrostructure and defect in continuous casting slab”. YB/T 4003-1997 TYPE C Grade 1.5 (max.) SHALL BE GUARANTEED for slab.2）凹坑、划伤、麻点、氧化铁皮压入、辊印等表面缺陷，导致钢板小于最小壁厚，不论大小和尺寸将被视为缺陷（不包含头尾各500mm）。2) Surface defects (Dents, scratches, pitting, rolled in scale, etc ) below minimum wall thickness shall be considered as a defect irrespective of size and dimension (excluding Max. 500mm from each coil end).3）钢卷供应商将保证除双边部共25mm外，钢卷其余部分无损探伤的结果。尺寸公差 DimentionalThickness Tolerance 厚度公差+ 0.3 MM / -0.1 MM ANY WHERE ON THE HRCWidth Tolerance 宽度公差+20 mm/ -0mmTelescopocity 塔形50 mm max.Fish tail and tongue 舌头、鱼尾Total 1000 mm Max Coil ID 内径710 mm -780 mmCoil OD 外径Max 2100 mmCamber 镰刀弯Max. 15 mm in 5 meter length5 化学成分要求 Chemical CompositionelementCoil SpecCMax 0.20MnMax 1.25SiMax. 0.40PMax 0.020SMax 0.010VMax 0.05NbMax 0.05TiMax 0.04Cr0.30.35MoMax 0.13NiMax 0.25CuMax 0.30AltMax. 0.06NMax 0.010BMax 0.0005CaMax 0.005V + Nb + TiMax 0.14Al/NMIn. 2:1CE(IIW) = C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15；CE(Pcm)= C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B; 当C0.12%时，只做CE(IIW) 。When C0.12%, only CE(IIW)；当C0.12%时，只做CE(pcm) 。When C0.12%, only CE(pcm).检验频次：每炉1个样；Ladle analysis: 1 samples per heat.只做熔炼分析，同时保证产品分析结果。Only ladle analysis；and guarantee product analysis.6 力学性能 Mechanical Properties1）试验方向：横向；1) Sample Direction: Transverse to Rolling2）试验频次：至少每炉1个；2) Mechanical Test : 1 samples per heat PROPERTIESRequirementTensile Test拉伸YS (Mpa)350-500 (aim:350450MPa)UTS (Mpa)450 650YS/TSMAX.0.90, AIM FOR 0.88EL (%)A50%, different thickness, Min. value according on API+2%Charpy Impact Test冲击Teat Temperature (C)0CAbsorb Energy (Joule)Individual40JAverage of 3 specimen60JShear Area (%) at-20CIndividualMin. 75%Average of 3 specimenMin. 80%Bend Test弯曲Mandrell Diameter2TBending180Vickers Hardness 硬度250HV10Grain Size Number 晶粒度8 OR finer7 标签和包装 Marking & Packing每卷附上两个标签，上面显示级别，尺寸，重量，炉号，卷号。2 tags per coil showing grade, size, weight, heat no, coil no.8 试验及试验要求 TEST AND TEST REQUIREMENT检验项目ITEM ISPECTIONED试验频率TEST FREQUENCY试样数量NOS. OF SAMPLING试验方法TEST METHOD熔炼分析LADLE ANLYSIS1次/炉 1/HEAT-ASTM A751拉伸TENSILE1次/炉 1/HEAT1件ASTM A370冲击V Charpy Impact1次/炉 1/HEAT3件ASTM E23弯曲 Bending1次/炉 1/HEAT1件ASTM A370硬度 Hardness1次/炉 1/HEAT1件ASTM