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GBT706-2016热轧型钢 ——（工字钢、槽钢、角钢）4.4.1型钢应按理论重量交货，理论重量按密度为7.85g/cm计算。经供需双方协商并在合同中注 明，亦可按实际重量交货。 4.4.2型钢重量允许偏差应不超过土5%。重量偏差（%）按式（1）计算。重量允许偏差适用于同一尺 寸且质量超过1吨的一批，当一批同一尺寸的质量不大于1t但根数大于10根时也适用。
4.4.3型钢的截面面积计算公式按表4所示
表4截裁面面积的计算方法
NY/T 3784-2020 农药热安全性检测方法 绝热最热法工学钢：“工"与高度值文腿宽度值文腰厚度值； 如：1450×150×11.5（简记为[45a）。 槽钢：“["与高度值×腿宽度值×腰厚度值； 如：[200×75×9（简记为［[20b）。 等边角钢："之"与边宽度值×边宽度值×边厚度值； 如：200×200×24（简记为Z200×24）。 不等边角钢：“之"与长边宽度值×短边宽度值×边厚度值 如：/160X100×16
钢的牌号和化学成分（熔炼分析)应符合GB/T700或GB/T1591的有关规定。根据需方要求 双方协议，也出可按其他牌号和化学成分供货。
表A.3等边角钢截面尺寸、截面面积、理论重量及截面特性
GB/T 7062016表A.4(续)型号面尺寸/mm戴面面织/理论重意外表配积/惯性矩/cm*慎性半径/em截闻概数/em重心距需/cmBdcm*(kg/m)(m*/m)I,I,I,w,W,W.tane1yXsY,610.548,350.35413326642.969.125.43.542.011.5417,97,906.530,4031,573,53712,309.660.35415331049.080.829.03.532,001,5320.69.097.500.4021,613,5711/71107981013.9410.90.35317235454.992.732,53,511.981.5323.310,38.450.4011.653.621017,1713.50.35320844365,911739.23,481,9$1.5128.512.510.30.3971.723.70714.1011.1 0,40322845574,412043.84,022,301,7626.512,09.92c,4081.804.0115.9912.60.40325752083.513849.24.012.281,7530.413.611,2C.4071.844,0612,5/812580111019,7115.50,40231265010117359.53.582.261,7437,315.513.60,4041,924.141223.3518.30.40236478011721069.43.952,241,7244.019.415.00.4002,004.22818,0414.20.4.5336673112119670.84,502.591.9838.517.314.30,4112.044,501022,2617.50.45244691314024685.84,472.551,9547,321,217,50,4092.124.5814/9140901226.4020.70.4515221 1001702971004,442.541.9555.925.020,50,4062,194.661430.4623,S0.4515941 2801923491144,422.511.9464.228.523.50,4032.274.74818.8414,80.47344289812319674.14,842.551,9843,917.514,50,3641.974.92101223,2618.30,47253§112014924689.94.812,531.9754.021.417,70.3622.055.011227,5021.70,4716321 3501732971054.792.501.9563.825.120.80.3592,125,0915/9150901431,8625.00.4717211 5701963501204,762,481,9473.328.823.80.3562.205,171533.9526,70.4717646302073761274.742,471.9378,030.525.30.3542,245.211636.0328,30.4708061 8002174031344,732.451.9382,632,326.80,3522,275.251025.3219.90,5126691 3602053371225.142,852,1962.126,621.90.3902.285.241230.0523.60,5117851 6402394061425.112.822.1773,531.325.80,3882,365,3216/10150100141334,7127,20.5108961 9102714761625,082,802.1584.635.329.60.3852.435.401539.2830,80,$101 00021803025481835.052,772.1695.340,233.40.3822,515.48
GB/T 7062016