国标《热轧型钢》GB/T 706-2016替代GB/T 706-2008对角钢截面尺寸、截面面积及理论重量参数等数值进行了调整，本表根据最新标准进行了修订，见《等边角钢截面尺寸、截面面积、理论重量表》。表中所对应的参数见下图所示（其中参数如需查询请参阅《热轧型钢》GB/T706-2016）。
热轧等边角钢(摘自GB/T 706-2016)
等边角钢截面尺寸、截面面积及理论重量表
| 型号 | 截面尺寸(mm) | 截面面积(cm²) | 理论重量(kg/m) | 外表面积(m²/m) | ||
|---|---|---|---|---|---|---|
| b | d | r | ||||
| 2 | 20 | 3 | 3.5 | 1.132 | 0.889 | 0.078 |
| 4 | 1.459 | 1.15 | 0.077 | |||
| 2.5 | 25 | 3 | 1.432 | 1.12 | 0.098 | |
| 4 | 1.859 | 1.46 | 0.097 | |||
| 3 | 30 | 3 | 4.5 | 1.749 | 1.37 | 0.117 |
| 4 | 2.276 | 1.79 | 0.117 | |||
| 3.6 | 36 | 3 | 2.109 | 1.66 | 0.141 | |
| 4 | 2.756 | 2.16 | 0.141 | |||
| 5 | 3.382 | 2.65 | 0.141 | |||
| 4 | 40 | 3 | 5 | 2.359 | 1.85 | 0.157 |
| 4 | 3.086 | 2.42 | 0.157 | |||
| 5 | 3.792 | 2.98 | 0.156 | |||
| 4.5 | 45 | 3 | 5 | 2.659 | 2.09 | 0.177 |
| 4 | 3.486 | 2.74 | 0.177 | |||
| 5 | 4.292 | 3.37 | 0.176 | |||
| 6 | 5.077 | 3.99 | 0.176 | |||
| 5 | 50 | 3 | 5.5 | 2.971 | 2.33 | 0.197 |
| 4 | 3.897 | 3.06 | 0.197 | |||
| 5 | 4.803 | 3.77 | 0.196 | |||
| 6 | 5.688 | 4.46 | 0.196 | |||
| 5.6 | 56 | 3 | 6 | 3.343 | 2.624 | 0.221 |
| 4 | 4.390 | 3.446 | 0.220 | |||
| 5 | 5.415 | 4.251 | 0.220 | |||
| 6 | 6.42 | 5.04 | 0.220 | |||
| 7 | 7.404 | 5.81 | 0.219 | |||
| 8 | 8.367 | 6.568 | 0.219 | |||
| 6 | 60 | 5 | 6.5 | 5.829 | 4.58 | 0.236 |
| 6 | 6.914 | 5.43 | 0.235 | |||
| 7 | 7.977 | 6.26 | 0.235 | |||
| 8 | 9.02 | 7.08 | 0.235 | |||
| 6.3 | 63 | 4 | 7 | 4.978 | 3.91 | 0.248 |
| 5 | 6.143 | 4.82 | 0.248 | |||
| 6 | 7.288 | 5.72 | 0.247 | |||
| 7 | 8.412 | 6.60 | 0.247 | |||
| 8 | 9.515 | 7.47 | 0.247 | |||
| 10 | 11.66 | 9.15 | 0.246 | |||
| 7 | 70 | 4 | 8 | 5.570 | 4.37 | 0.275 |
| 5 | 6.876 | 5.40 | 0.275 | |||
| 6 | 8.160 | 6.41 | 0.275 | |||
| 7 | 9.424 | 7.40 | 0.275 | |||
| 8 | 10.67 | 8.37 | 0.274 | |||
| 7.5 | 75 | 5 | 9 | 7.412 | 5.82 | 0.295 |
| 6 | 8.797 | 6.91 | 0.294 | |||
| 7 | 10.160 | 7.98 | 0.294 | |||
| 8 | 11.503 | 9.03 | 0.294 | |||
| 9 | 12.83 | 10.1 | 0.294 | |||
| 10 | 14.13 | 11.1 | 0.293 | |||
| 8 | 80 | 5 | 7.912 | 6.21 | 0.315 | |
| 6 | 9.397 | 7.38 | 0.314 | |||
| 7 | 10.860 | 8.53 | 0.314 | |||
| 8 | 12.30 | 9.66 | 0.314 | |||
| 9 | 13.73 | 10.8 | 0.314 | |||
| 10 | 15.13 | 11.9 | 0.313 | |||
| 9 | 90 | 6 | 10 | 10.64 | 8.35 | 0.354 |
| 7 | 12.30 | 9.66 | 0.354 | |||
| 8 | 13.94 | 10.9 | 0.353 | |||
| 9 | 15.57 | 12.2 | 0.353 | |||
| 10 | 17.17 | 13.5 | 0.353 | |||
| 12 | 20.31 | 15.9 | 0.352 | |||
| 10 | 100 | 6 | 12 | 11.93 | 9.37 | 0.393 |
| 7 | 13.80 | 10.8 | 0.393 | |||
| 8 | 15.64 | 12.3 | 0.393 | |||
| 9 | 17.46 | 13.7 | 0.392 | |||
| 10 | 19.26 | 15.1 | 0.392 | |||
| 12 | 22.80 | 17.9 | 0.391 | |||
| 14 | 26.26 | 20.6 | 0.391 | |||
| 16 | 29.63 | 23.3 | 0.390 | |||
| 11 | 110 | 7 | 15.20 | 11.9 | 0.433 | |
| 8 | 17.24 | 13.5 | 0.433 | |||
| 10 | 21.26 | 16.7 | 0.432 | |||
| 12 | 25.20 | 19.8 | 0.431 | |||
| 14 | 29.06 | 22.8 | 0.431 | |||
| 12.5 | 125 | 8 | 14 | 19.75 | 15.5 | 0.492 |
| 10 | 24.37 | 19.1 | 0.491 | |||
| 12 | 28.91 | 22.7 | 0.491 | |||
| 14 | 33.37 | 26.2 | 0.490 | |||
| 16 | 37.74 | 29.6 | 0.489 | |||
| 14 | 140 | 10 | 27.37 | 21.5 | 0.551 | |
| 12 | 32.51 | 25.5 | 0.551 | |||
| 14 | 37.37 | 29.5 | 0.550 | |||
| 16 | 42.54 | 33.4 | 0.549 | |||
| 15 | 150 | 8 | 14 | 23.75 | 18.6 | 0.592 |
| 10 | 29.37 | 23.1 | 0.591 | |||
| 12 | 34.91 | 27.4 | 0.591 | |||
| 14 | 40.37 | 31.7 | 0.590 | |||
| 15 | 43.06 | 33.8 | 0.590 | |||
| 16 | 45.74 | 35.9 | 0.589 | |||
| 16 | 160 | 10 | 16 | 31.50 | 24.7 | 0.630 |
| 12 | 37.44 | 29.4 | 0.630 | |||
| 14 | 43.30 | 34.0 | 0.629 | |||
| 16 | 49.07 | 38.5 | 0.629 | |||
| 18 | 180 | 12 | 42.24 | 33.2 | 0.710 | |
| 14 | 48.90 | 38.4 | 0.709 | |||
| 16 | 55.47 | 43.5 | 0.709 | |||
| 18 | 61.96 | 48.6 | 0.708 | |||
| 20 | 200 | 14 | 18 | 54.64 | 42.9 | 0.788 |
| 16 | 62.01 | 48.7 | 0.788 | |||
| 18 | 69.30 | 54.4 | 0.787 | |||
| 20 | 76.51 | 60.1 | 0.787 | |||
| 24 | 90.66 | 71.2 | 0.785 | |||
| 22 | 220 | 16 | 21 | 68.67 | 53.9 | 0.866 |
| 18 | 76.75 | 60.3 | 0.866 | |||
| 20 | 84.76 | 66.5 | 0.865 | |||
| 22 | 92.68 | 72.8 | 0.865 | |||
| 24 | 100.5 | 78.9 | 0.864 | |||
| 26 | 108.3 | 85.0 | 0.864 | |||
| 25 | 250 | 18 | 24 | 87.84 | 69.0 | 0.985 |
| 20 | 97.05 | 76.2 | 0.984 | |||
| 22 | 106.2 | 83.3 | 0.983 | |||
| 24 | 115.2 | 90.4 | 0.983 | |||
| 26 | 124.2 | 97.5 | 0.982 | |||
| 28 | 133.0 | 104 | 0.982 | |||
| 30 | 141.8 | 111 | 0.981 | |||
| 32 | 150.5 | 118 | 0.981 | |||
| 35 | 163.4 | 128 | 0.980 | |||
角钢尺寸、外形及允许偏差
| 项目 | 允许偏差 | |
|---|---|---|
| 边宽度(b) | b≤56 | ±0.8 |
| 56<b≤90 | ±1.2 | |
| 90<b≤140 | ±1.8 | |
| 140<b≤200 | ±2.5 | |
| b>200 | ±3.5 | |
| 边厚度(d) | b≤56 | ±0.4 |
| 56<b≤90 | ±0.6 | |
| 90<b≤140 | ±0.7 | |
| 140<b≤200 | ±1.0 | |
| b>200 | ±1.4 | |
重量及允许偏差
型钢重量允许偏差应不超过±5%，理论重量按密度7.85g/cm3计算。重量偏差（%）按下式计算。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1吨但根数大于10根时也适用。
重量偏差=（实际重量-理论重量）÷理论重量×100%
等边角钢的截面面积计算公式：
d(2b-d)+0.215(r2-2r1²)
规格表示方法
等边角钢：“∠”与边宽度值×边宽度值×边厚度值
如：∠200×200×24（简记为∠200×24）。
表面质量
型钢表面不应有裂缝、折叠、结疤、分层和夹杂。
型钢表面允许有局部发纹、凹坑、麻点、划痕和氧化铁皮压入等缺陷存在，但不应超出型钢尺寸深度的五倍，清除后的型钢尺寸不应超出尺寸的允许偏差。
型钢端部不应有大于5mm的毛刺。
热轧不等边角钢(摘自GB/T 706-2016)
不等边角钢截面尺寸、截面面积及理论重量表
| 型号 | 尺寸（mm） | 截面面积 (cm2) | 理论重量 (kg/m) | 外表面积 (m2/m) | |||
|---|---|---|---|---|---|---|---|
| B | b | d | r | ||||
| 2.5/1.6 | 25 | 16 | 3 | 3.5 | 1.162 | 0.91 | 0.080 |
| 4 | 1.499 | 1.18 | 0.079 | ||||
| 3.2/2 | 32 | 20 | 3 | 1.492 | 1.17 | 0.102 | |
| 4 | 1.939 | 1.52 | 0.101 | ||||
| 4/2.5 | 40 | 25 | 3 | 4 | 1.890 | 1.48 | 0.127 |
| 4 | 2.467 | 1.94 | 0.127 | ||||
| 4.5/2.8 | 45 | 28 | 3 | 5 | 2.149 | 1.69 | 0.143 |
| 4 | 2.806 | 2.20 | 0.143 | ||||
| 5/3.2 | 50 | 32 | 3 | 5.5 | 2.431 | 1.91 | 0.161 |
| 4 | 3.177 | 2.49 | 0.160 | ||||
| 5.6/3.6 | 56 | 36 | 3 | 6 | 2.743 | 2.15 | 0.181 |
| 4 | 3.590 | 2.82 | 0.180 | ||||
| 5 | 4.415 | 3.47 | 0.180 | ||||
| 6.3/4 | 63 | 40 | 4 | 7 | 4.058 | 3.19 | 0.202 |
| 5 | 4.993 | 3.92 | 0.202 | ||||
| 6 | 5.908 | 4.64 | 0.201 | ||||
| 7 | 6.802 | 5.34 | 0.201 | ||||
| 7/4.5 | 70 | 45 | 4 | 7.5 | 4.553 | 3.57 | 0.226 |
| 5 | 5.609 | 4.40 | 0.225 | ||||
| 6 | 6.644 | 5.22 | 0.225 | ||||
| 7 | 7.658 | 6.01 | 0.225 | ||||
| 7.5/5 | 75 | 50 | 5 | 8 | 6.126 | 4.81 | 0.245 |
| 6 | 7.260 | 5.70 | 0.245 | ||||
| 8 | 9.467 | 7.43 | 0.244 | ||||
| 10 | 11.59 | 9.10 | 0.244 | ||||
| 8/5 | 80 | 50 | 5 | 6.375 | 5.00 | 0.255 | |
| 6 | 7.560 | 5.93 | 0.255 | ||||
| 7 | 8.724 | 6.85 | 0.255 | ||||
| 8 | 9.867 | 7.75 | 0.254 | ||||
| 9/5.6 | 90 | 56 | 5 | 9 | 7.212 | 5.66 | 0.287 |
| 6 | 8.557 | 6.72 | 0.286 | ||||
| 7 | 9.881 | 7.76 | 0.286 | ||||
| 8 | 11.18 | 8.78 | 0.286 | ||||
| 10/6.3 | 100 | 63 | 6 | 10 | 9.618 | 7.55 | 0.320 |
| 7 | 11.11 | 8.72 | 0.320 | ||||
| 8 | 12.58 | 9.88 | 0.319 | ||||
| 10 | 15.47 | 12.10 | 0.319 | ||||
| 10/8 | 100 | 80 | 6 | 10 | 10.64 | 8.35 | 0.354 |
| 7 | 12.30 | 9.66 | 0.354 | ||||
| 8 | 13.94 | 10.9 | 0.353 | ||||
| 10 | 17.17 | 13.5 | 0.353 | ||||
| 11/7 | 110 | 70 | 6 | 10.64 | 8.35 | 0.354 | |
| 7 | 12.30 | 9.66 | 0.354 | ||||
| 8 | 13.94 | 10.9 | 0.353 | ||||
| 10 | 17.17 | 13.5 | 0.353 | ||||
| 12.5/8 | 125 | 80 | 7 | 11 | 14.10 | 11.1 | 0.403 |
| 8 | 15.99 | 12.6 | 0.403 | ||||
| 10 | 19.71 | 15.5 | 0.402 | ||||
| 12 | 2.33 | 18.3 | 0.402 | ||||
| 14/9 | 140 | 90 | 8 | 12 | 18.04 | 14.2 | 0.453 |
| 10 | 22.26 | 17.5 | 0.452 | ||||
| 12 | 26.40 | 20.7 | 0.451 | ||||
| 14 | 30.46 | 23.9 | 0.451 | ||||
| 15/9 | 150 | 90 | 8 | 18.84 | 14.8 | 0.473 | |
| 10 | 22.26 | 18.3 | 0.472 | ||||
| 12 | 27.60 | 21.7 | 0.471 | ||||
| 14 | 31.86 | 25.0 | 0.471 | ||||
| 15 | 33.95 | 25.7 | 0.471 | ||||
| 16 | 36.03 | 28.3 | 0.470 | ||||
| 16/10 | 160 | 100 | 10 | 13 | 25.32 | 19.9 | 0.512 |
| 12 | 30.05 | 23.6 | 0.511 | ||||
| 14 | 34.71 | 27.2 | 0.510 | ||||
| 16 | 39.28 | 30.8 | 0.510 | ||||
| 18/11 | 180 | 110 | 10 | 14 | 28.37 | 22.3 | 0.571 |
| 12 | 33.71 | 26.5 | 0.571 | ||||
| 14 | 38.97 | 30.6 | 0.570 | ||||
| 16 | 44.14 | 34.6 | 0.569 | ||||
| 20/12.5 | 200 | 125 | 12 | 37.91 | 29.8 | 0.641 | |
| 14 | 43.87 | 34.4 | 0.640 | ||||
| 16 | 49.74 | 39.0 | 0.639 | ||||
| 18 | 55.53 | 43.6 | 0.639 | ||||
角钢尺寸、外形及允许偏差
| 项目 | 允许偏差 | |
|---|---|---|
| 边宽度(B，b) | b*≤56 | ±0.8 |
| 56<b*≤90 | ±1.2 | |
| 90<b*≤140 | ±1.8 | |
| 140<b*≤200 | ±2.5 | |
| b*>200 | ±3.5 | |
| 边厚度(d) | b*≤56 | ±0.4 |
| 56<b*≤90 | ±0.6 | |
| 90<b*≤140 | ±0.7 | |
| 140<b*≤200 | ±1.0 | |
| b*>200 | ±1.4 | |
注明*不等边角钢按长边宽度。
重量及允许偏差
型钢重量允许偏差应不超过±5%，理论重量按密度7.85g/cm3计算。重量偏差（%）按下式计算。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1吨但根数大于10根时也适用。
重量偏差=（实际重量-理论重量）÷理论重量×100%
不等边角钢的截面面积计算公式：
d(B+b-d)+0.215(r²-2r1²)
规格表示方法
不等边角钢：“∠”与长边宽度值×短边宽度值×边厚度值
如：∠160×100×16。
表面质量
型钢表面不应有裂缝、折叠、结疤、分层和夹杂。
型钢表面允许有局部发纹、凹坑、麻点、划痕和氧化铁皮压入等缺陷存在，但不应超出型钢尺寸深度的五倍，清除后的型钢尺寸不应超出尺寸的允许偏差。
型钢端部不应有大于5mm的毛刺。
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