标准编号:	WJX(RZ)159-2005
中文名称:	焊接高强度结构用钢 HG 785 供货技术条件
英文名称:	Specification for supply of welded high strength structural steel HG785
行业分类:	WJ    兵工民品行业标准
标准状态:	valid
翻译语言:	英文
文件格式:	PDF
中文字符数:	1000 字
翻译价格(元):	150.0
交付时间:	付款后 1 个工作日

Specification for supply of welded high strength structural steel HG785 焊接高强度结构用钢HG785供货技术条件 WJX (RZ) 159-2005 Name: welded high strength structural steel Designation: HG785 Delivery status: hot rolled This Specification replaces WJX (RZ) 159-2003 1. Scope of application This Specification is applicable to welded high strength structural steel with thickness of 5 ~ 16 mm. 2. Normative references GB 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB 223 Methods for chemical analysis of iron, steel and alloy GB 228 Metallic materials - Tensile testing GB 247 General rule of package, mark and certification for steel plates ( sheets) and strips GB 3274 Hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels JB 4159 Metal Charpy (V-notch) low temperature impact test method 3. Chemical composition The chemical composition of the steel shall meet the requirements of the table below: Designation Test items Expression of results Results or measured values Minimum Minimum HG785 C Si Mn P S Mo Cr Ni Nb B % % % % % % % % % % / 0.15 0.80 / / 0.10 0.10 / 0.02 / 0.15 0.40 2.00 0.030 0.015 0.60 0.60 0.80 0.08 0.005 Note: other minor alloying elements can be added if necessary. 4. Mechanical properties The mechanical properties of the steel shall be in accordance with those specified in the table below: Designation Test items Expression of results Results or measured values Minimum Minimum HG785D HG785E ReL Rm A50 180°cold bending Impact energy at -20℃ Impact energy at -40℃ MPa MPa % d=3a J J 685 785 15 Intact 40 27 / / / / / / Notes: 1) Sampling direction: transverse for tensile and cold bending samples, and longitudinal for impact samples; 2) Sampling position: 1/4 of the plate width. For steel plates with thickness ≥30mm, the center line of the sample is at 1/4 of the plate thickness, and there is no requirement for other plate thicknesses; 3) The impact energy and test temperature for Charpy (V-notch) impact test shall meet the requirements of the table above. The impact energy shall be calculated according to the arithmetic average of 3 specimens; it is acceptable that one of the specimen results is small, but shall not be less than 70% of the specified value; 4) There is no requirement for the impact energy of steel plates with thickness < 6mm. The impact specimen size of steel plate with thickness ≥ 6 ~ 7 mm is 5×10×55 (mm), that of steel plate with thickness ≥ 8 ~ 10 mm is 7.5×10×55 (mm), and that of steel plate with thickness ≥8~10mm is 10× 10× 55 (mm). For small size samples, the specified value of impact energy decreases proportionally.

焊接高强度结构用钢HG785供货技术条件 WJX (RZ) 159-2005 钢材名称：焊接高强度结构钢 钢材牌号：HG785 交货状态：热轧态 本技术条件取代WJX (RZ) 159—2003 1.适用范围 本技术条件适用于厚度为5～16mm的焊接高强度结构钢。 2.引用标准 GB 222 钢的化学分析用试样取样法及成品化学成分允许偏差 GB 223 钢铁及合金化学分析方法 GB 228 金属拉伸试验方法 GB 247 钢板和钢带的检验、包装、标志及质量证明书的一般规定 GB 3274 碳素结构钢和低合金结构钢热轧厚钢板和钢带 JB 4159 金属夏比(V型缺口)低温冲击实验方法 3.化学成分 钢的化学成分应符合下表的规定： 牌号 检测项目 结果描述 结果或测定值 最小 最大 HG785 C Si Mn P S Mo Cr Ni Nb B ％ ％ ％ ％ ％ ％ ％ ％ ％ ％ / 0.15 0.80 / / 0.10 0.10 / 0.02 / 0.15 0.40 2.00 0.030 0.015 0.60 0.60 0.80 0.08 0.005 注：必要时可添加其它少量合金元素。 4.机械性能 钢的机械性能应符合下表的规定： 牌号 检测项目 结果描述 结果或测定值 最小 最大 HG785D HG785E ReL Rm A50 180°冷弯 -20℃冲击功 -40℃冲击功 MPa MPa ％ d＝3a J J 685 785 15 完好 40 27 / / / / / / 注：1)取样方向：拉力、冷弯样为横向，冲击样为纵向； 2)取样部位：板宽1/4处，对于厚度≥30mm钢板，其试样中心线为板厚的1/4处，其它板厚不作要求； 3)夏比(V型缺口)冲击试验的冲击功和试验温度应符合上表规定，冲击功按一组三个试样试验结果的算术平均值计算，允许有一个低值，但不得低于规定值的70％； 4)厚度＜6mm钢板冲击功不作要求。厚度≥6～7mm钢板冲击试样规格为5×10×55 (mm)，厚度≥8～10mm钢板冲击试样规格为7.5×10×55 (mm)，厚度≥11mm钢板冲击试样规格为10×10×55(mm)；对小尺寸试样，冲击功规定值成正比例递减。 5.组批：按70吨组批，其他按GB3274-88标准中有关规定执行。 6.尺寸、外形、重量及允许偏差按GB709-88标准执行，表面质量按GB3274-88标准中有关规定执行，钢材的包装、标志及质量证明书按GB247标准中有关规定执行。 7.协议所引用的标准应采用最新版本的国家标准，其他未尽事宜应由双方协商解决。