標準編號:	WJX(RZ)159-2005
中文名稱:	焊接高強度結構用鋼 HG 785 供貨技術條件
英文名稱:	Specification for supply of welded high strength structural steel HG785
行業分類:	WJ    兵工民品行業標準
標準狀態:	valid
翻譯語言:	英文
文件格式:	PDF
中文字符數:	1000 字
翻譯價格(元):	150.0
交付時間:	付款后 1 個工作日

Specification for supply of welded high strength structural steel HG785 焊接高強度結構用鋼HG785供貨技術條件 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.

焊接高強度結構用鋼HG785供貨技術條件 WJX (RZ) 159-2005 鋼材名稱：焊接高強度結構鋼 鋼材牌號：HG785 交貨狀態：熱軋態 本技術條件取代WJX (RZ) 159—2003 1.適用范圍 本技術條件適用于厚度為5～16mm的焊接高強度結構鋼。 2.引用標準 GB 222 鋼的化學分析用試樣取樣法及成品化學成分允許偏差 GB 223 鋼鐵及合金化學分析方法 GB 228 金屬拉伸試驗方法 GB 247 鋼板和鋼帶的檢驗、包裝、標志及質量證明書的一般規定 GB 3274 碳素結構鋼和低合金結構鋼熱軋厚鋼板和鋼帶 JB 4159 金屬夏比(V型缺口)低溫沖擊實驗方法 3.化學成分 鋼的化學成分應符合下表的規定： 牌號 檢測項目 結果描述 結果或測定值 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：必要時可添加其它少量合金元素。 4.機械性能 鋼的機械性能應符合下表的規定： 牌號 檢測項目 結果描述 結果或測定值 最小 最大 HG785D HG785E ReL Rm A50 180°冷彎 -20℃沖擊功 -40℃沖擊功 MPa MPa ％ d＝3a J J 685 785 15 完好 40 27 / / / / / / 注：1)取樣方向：拉力、冷彎樣為橫向，沖擊樣為縱向； 2)取樣部位：板寬1/4處，對于厚度≥30mm鋼板，其試樣中心線為板厚的1/4處，其它板厚不作要求； 3)夏比(V型缺口)沖擊試驗的沖擊功和試驗溫度應符合上表規定，沖擊功按一組三個試樣試驗結果的算術平均值計算，允許有一個低值，但不得低于規定值的70％； 4)厚度＜6mm鋼板沖擊功不作要求。厚度≥6～7mm鋼板沖擊試樣規格為5×10×55 (mm)，厚度≥8～10mm鋼板沖擊試樣規格為7.5×10×55 (mm)，厚度≥11mm鋼板沖擊試樣規格為10×10×55(mm)；對小尺寸試樣，沖擊功規定值成正比例遞減。 5.組批：按70噸組批，其他按GB3274-88標準中有關規定執行。 6.尺寸、外形、重量及允許偏差按GB709-88標準執行，表面質量按GB3274-88標準中有關規定執行，鋼材的包裝、標志及質量證明書按GB247標準中有關規定執行。 7.協議所引用的標準應采用最新版本的國家標準，其他未盡事宜應由雙方協商解決。