矩形冷弯空心型钢_结构用冷弯空心型钢(GB/T6728-2017)_型钢_钢材_黑色金属材料_常用机械工程材料

矩形冷弯空心型钢(GB/T 6728—2017)

冷弯型钢弯角外圆弧半径
厚度 t/mm	弯角外圆弧半径r		厚度 t/mm	弯角外圆弧半径r
厚度 t/mm	碳素钢 (σ_s≤320MPa)	低合金钢 (σ_s＞320MPa)	厚度 t/mm	碳素钢 (σ_s≤320MPa)	低合金钢 (σ_s＞320MPa)
t≤3	(1.0~2.5)t	(1.5~2.5)t	6＜t≤10	(2.0~3.0)t	(2.0~3.5)t
3＜t≤6	(1.5~2.5)t	(2.0~3.0)t	t＞10	(2.0~3.5)t	(2.5~4.0)t
注：σ_s值指标准中规定的最低值。

边长/mm

允许偏差

壁厚

理论质量

截面面积

惯性矩/cm⁴

惯性半径/cm

截面系数/cm³

扭转常数

/mm

t/mm

M/kg·m^-¹

A/cm²

I_X

I_Y

R_X

R_Y

W_X

W_Y

I_t/cm⁴

C_t/cm³

±0.50

1.5

1.06

1.35

1.59

0.84

1.08

0.788

1.06

0.84

1.83

1.40

1.75

1.22

1.55

1.77

0.93

1.07

0.777

1.18

0.93

2.07

1.56

2.0

1.36

1.74

1.94

1.02

1.06

0.765

1.29

1.02

2.29

1.71

2.5

1.64

2.09

2.21

1.15

1.03

0.742

1.47

1.15

2.68

1.95

±0.50

1.5

1.30

1.65

3.27

1.10

1.41

0.815

1.63

1.10

2.74

1.91

1.75

1.49

1.90

3.68

1.22

1.39

0.804

1.84

1.23

3.11

2.14

2.0

1.68

2.14

4.05

1.34

1.38

0.793

2.02

1.34

3.45

2.36

2.5

2.03

2.59

4.69

1.54

1.35

0.770

2.35

1.54

4.06

2.72

3.0

2.36

3.01

5.21

1.68

1.32

0.748

2.60

1.68

4.57

3.00

±0.50

1.5

1.41

1.80

3.82

1.84

1.46

1.010

1.91

1.47

4.06

2.46

1.75

1.63

2.07

4.32

2.07

1.44

0.999

2.16

1.66

4.63

2.78

2.0

1.83

2.34

4.77

2.28

1.43

0.988

2.39

1.82

5.17

3.07

2.5

2.23

2.84

5.57

2.64

1.40

0.965

2.79

2.11

6.15

3.59

3.0

2.60

3.31

6.24

2.94

1.37

0.942

3.12

2.35

7.00

4.01

±0.50

1.5

1.53

1.95

4.38

2.81

1.50

1.199

2.19

1.87

5.52

3.02

1.75

1.77

2.25

4.96

3.17

1.48

1.187

2.48

2.11

6.31

3.42

2.0

1.99

2.54

5.49

3.5l

1.47

1.176

2.75

2.34

7.07

3.79

2.5

2.42

3.09

6.45

4.10

1.45

1.153

3.23

2.74

8.47

4.46

3.0

2.83

3.61

7.27

4.60

1.42

1.129

3.63

3.07

9.72

5.03

±0.50

1.5

1.65

2.10

6.65

2.25

1.78

1.040

2.66

1.80

5.52

3.41

1.75

1.90

2.42

7.55

2.54

1.76

1.024

3.02

2.03

6.32

3.54

2.0

2.15

2.74

8.38

2.81

1.75

1.013

3.35

2.25

7.06

3.92

2.5

2.62

2.34

9.89

3.28

1.72

0.991

3.95

2.62

8.43

4.60

3.0

3.07

3.91

11.17

3.67

1.69

0.969

4.47

2.93

9.64

5.18

±0.50

1.5

1.767

2.252

7.535

3.415

1.829

1.231

3.014

2.276

7.587

3.83

1.75

2.039

2.598

8.566

3.868

1.815

1.220

3.426

2.579

8.682

4.35

2.0

2.305

2.936

9.535

4.291

1.801

1.208

3.814

2.861

9.727

4.84

2.5

2.817

3.589

11.296

5.050

1.774

1.186

4.518

3.366

11.666

5.72

3.0

3.303

4.206

12.827

5.696

1.745

1.163

5.130

3.797

13.401

6.49

4.0

4.198

5.347

15.239

6.682

1.688

1.117

6.095

4.455

16.244

7.77

±0.50

1.5

2.003

2.552

9.300

6.602

1.908

1.608

3.720

3.301

12.238

5.24

1.75

2.314

2.948

10.603

7.518

1.896

1.596

4.241

3.759

14.059

5.97

2.0

2.619

3.336

11.840

8.348

1.883

1.585

4.736

4.192

15.817

6.673

2.5

3.210

4.089

14.121

9.976

1.858

1.562

5.648

4.988

19.222

7.965

3.0

3.775

4.808

16.149

11.382

1.833

1.539

6.460

5.691

22.336

9.123

4.0

4.826

6.148

19.493

13.677

1.781

1.492

7.797

6.839

27.820

11.06

±0.50

1.5

1.767

2.252

8.453

2.460

1.937

1.045

3.074

1.968

6.273

3.458

1.75

2.039

2.598

9.606

2.779

1.922

1.034

3.493

2.223

7.156

3.916

2.0

2.305

2.936

10.689

3.073

1.907

1.023

3.886

2.459

7.992

4.342

±0.50

1.5

2.121

2.702

11.674

7.158

2.078

1.627

4.245

3.579

14.017

5.794

1.75

2.452

3.123

13.329

8.158

2.065

1.616

4.847

4.079

16.175

6.614

2.0

2.776

3.536

14.904

9.107

2.052

1.604

5.419

4.553

18.208

7.394

±0.60

1.75

2.726

3.473

15.811

13.660

2.133

1.983

5.749

5.464

23.173

8.415

2.0

3.090

3.936

17.714

15.298

2.121

1.971

6.441

6.119

26.142

9.433

±0.60

2.0

2.620

3.337

15.046

5.078

2.123

1.234

5.015

3.385

12.570

5.881

2.5

3.209

4.089

17.933

5.998

2.094

1.211

5.977

3.998

15.054

6.981

3.0

3.774

4.808

20.496

6.794

2.064

1.188

6.832

4.529

17.335

7.950

4.0

4.826

6.147

24.691

8.045

2.004

1.143

8.230

5.363

21.141

9.523

±0.60

2.0

2.934

3.737

18.412

9.831

2.220

1.622

6.137

4.915

20.702

8.116

2.5

3.602

4.589

22.069

11.734

2.192

1.595

7.356

5.867

25.045

9.722

3.0

4.245

5.408

25.374

13.436

2.166

1.576

8.458

6.718

29.121

11.175

4.0

5.451

6.947

30.974

16.269

2.111

1.530

10.324

8.134

36.298

13.653

±0.60

2.0

3.562

4.537

31.475

18.758

2.634

2.033

8.993

7.503

37.454

12.196

3.0

5.187

6.608

44.046

26.099

2.581

1.987

12.584

10.439

53.426

17.06

4.0

6.710

8.547

54.663

32.210

2.528

1.941

15.618

12.884

67.613

21.189

5.0

8.129

10.356

63.435

37.179

2.474

1.894

18.121

14.871

79.908

24.642

±0.70

2.0

3.561

4.536

37.355

12.720

2.869

1.674

9.339

6.361

30.881

11.004

2.5

4.387

5.589

45.103

15.255

2.840

1.652

11.275

7.627

37.467

13.283

3.0

5.187

6.608

52.246

17.552

2.811

1.629

13.061

8.776

43.680

15.283

4.0

6.710

8.547

64.780

21.474

2.752

1.585

16.195

10.737

54.787

18.844

5.0

8.129

10.356

75.080

24.567

2.692

1.540

18.770

12.283

64.110

21.744

±0.70

3.0

6.129

7.808

70.042

44.886

2.995

2.397

17.510

14.962

88.111

24.143

4.0

7.966

10.147

87.945

56.105

2.943

2.351

21.976

18.701

112.583

30.332

5.0

9.699

12.356

103.247

65.634

2.890

2.304

25.811

21.878

134.503

35.673

±0.75

3.0

5.658

7.208

70.487

19.610

3.127

1.649

15.663

9.805

51.193

17.339

4.0

7.338

9.347

87.894

24.077

3.066

1.604

19.532

12.038

64.320

21.441

5.0

8.914

11.356

102.487

27.651

3.004

1.560

22.774

13.825

75.426

24.819

±0.75

2.0

4.190

5.337

57.878

23.368

3.293

2.093

12.862

9.347

53.366

15.882

2.5

5.172

6.589

70.263

28.236

3.266

2.070

15.614

11.294

65.299

19.235

3.0

6.129

7.808

81.845

32.735

3.237

2.047

18.187

13.094

76.433

22.316

4.0

7.966

10.147

102.696

40.695

3.181

2.002

22.821

16.278

97.162

27.961

5.0

9.699

12.356

120.570

47.345

3.123

1.957

26.793

18.938

115.436

36.774

±0.75

2.0

4.346

5.536

61.75

28.957

3.340

2.287

13.733

10.53

62.724

17.601

2.5

5.368

6.839

75.049

33.065

3.313

2.264

16.678

12.751

76.877

21.357

±0.75

3.0

6.600

8.408

93.203

49.764

3.329

2.432

20.711

16.588

104.552

27.391

4.0

8.594

10.947

117.499

62.387

3.276

2.387

26.111

20.795

133.852

34.501

5.0

10.484

13.356

138.653

73.218

3.222

2.311

30.811

24.406

160.273

40.712

±0.75

2.0

4.347

5.537

66.084

24.521

3.455

2.104

13.912

9.808

57.458

16.804

2.5

5.369

6.839

80.306

29.647

3.247

2.082

16.906

11.895

70.324

20.364

100

±0.80

3.0

6.690

8.408

106.451

36.053

3.558

2.070

21.290

14.421

88.311

25.012

4.0

8.594

10.947

134.124

44.938

3.500

2.026

26.824

17.975

112.409

31.35

5.0

10.484

13.356

158.155

52.429

3.441

1.981

31.631

20.971

133.758

36.804

120

±0.90

2.5

6.350

8.089

143.97

36.704

4.219

2.130

23.995

14.682

96.026

26.006

3.0

7.543

9.608

168.58

42.693

4.189

2.108

28.097

17.077

112.870

30.317

120

±0.90

3.0

8.013

10.208

189.113

64.398

4.304

2.511

31.581

24.666

156.029

37.138

4.0

10.478

13.347

240.724

81.235

4.246

2.466

40.120

27.078

200.407

47.048

5.0

12.839

16.356

286.941

95.968

4.188

2.422

47.823

31.989

240.869

55.846

6.0

15.097

19.232

327.950

108.716

4.129

2.377

54.658

36.238

277.361

63.597

120

±0.90

3.0

8.955

11.408

230.189

123.430

4.491

3.289

38.364

30.857

255.128

50.799

4.0

11.734

14.947

294.569

157.281

4.439

3.243

49.094

39.320

330.438

64.927

5.0

14.409

18.356

353.108

187.747

4.385

3.198

58.850

46.936

400.735

77.772

6.0

16.981

21.632

105.998

214.977

4.332

3.152

67.666

53.744

165.940

83.399

140

±1.00

4.0

12.990

16.547

429.582

180.407

5.095

3.301

61.368

45.101

410.713

76.478

5.0

15.979

20.356

517.023

215.914

5.039

3.256

73.860

53.978

498.815

91.834

6.0

18.865

24.032

569.935

247.905

4.983

3.211

85.276

61.976

580.919

105.83

150

100

±1.20

4.0

14.874

18.947

594.585

318.551

5.601

4.110

79.278

63.710

660.613

104.94

5.0

18.334

23.356

719.164

383.988

5.549

4.054

95.888

79.797

806.733

126.81

6.0

21.691

27.632

834.615

444.135

5.495

4.009

111.282

88.827

915.022

147.07

8.0

28.096

35.791

1039.101

519.308

5.388

3.917

138.546

109.861

1147.710

181.85

160

±1.20

3.0

9.898

12.608

389.860

83.915

5.561

2.580

48.732

27.972

228.15

50.140

4.5

14.498

18.469

552.080

116.66

5.468

2.513

69.010

38.886

324.96

70.085

160

±1.20

4.0

14.216

18.117

597.691

203.532

5.738

3.348

71.711

50.883

493.129

88.031

5.0

17.519

22.356

721.650

214.089

5.681

3.304

90.206

61.020

599.175

105.90

6.0

20.749

26.433

835.936

286.832

5.623

3.259

104.192

76.208

698.881

122.27

8.0

26.810

33.644

1036.485

343.599

5.505

3.170

129.560

85.899

876.599

149.54

180

±1.20

3.0

11.075

14.108

550.35

111.78

6.246

2.815

61.150

34.393

306.750

61.849

4.5

16.264

20.719

784.13

156.47

6.152

2.748

87.125

48.144

438.910

86.993

180

100

±1.30

4.0

16.758

21.317

926.020

373.879

6.586

4.184

102.891

74.755

852.708

127.06

5.0

20.689

26.356

1124.156

451.738

6.530

4.140

124.906

90.347

1012.589

153.88

6.0

24.517

31.232

1309.527

523.767

6.475

4.095

145.503

104.753

1222.933

178.88

8.0

31.861

40.391

1643.149

651.132

6.362

4.002

182.572

130.226

1554.606

222.49

200

100

±1.30

4.0

18.014

22.941

1199.680

410.261

7.230

4.230

119.968

82.152

984.151

141.81

5.0

22.259

28.356

1459.270

496.905

7.173

4.186

145.920

99.381

1203.878

171.94

6.0

26.101

33.632

1703.224

576.855

7.116

4.141

170.332

115.371

1412.986

200.10

8.0

34.376

43.791

2145.993

719.014

7.000

4.052

214.599

143.802

1798.551

249.60

200

120

±1.40

4.0

19.3

24.5

1353

618

7.43

5.02

135

103

1345

172

5.0

23.8

30.4

1649

750

7.37

4.97

165

125

1652

210

6.0

28.3

36.0

1929

874

7.32

4.93

193

146

1947

245

8.0

36.5

46.4

2386

1079

7.17

4.82

239

180

2507

308

200

150

±1.50

4.0

21.2

26.9

1584

1021

7.67

6.16

158

136

1942

219

5.0

26.2

33.4

1935

1245

7.62

6.11

193

166

2391

267

6.0

31.1

39.6

2268

1457

7.56

6.06

227

194

2826

312

8.0

40.2

51.2

2892

1815

7.43

5.95

283

242

3664

396

220

140

±1.50

4.0

21.8

27.7

1892

948

8.26

5.84

172

135

1987

224

5.0

27.0

34.4

2313

1155

8.21

5.80

210

165

2447

274

6.0

32.1

40.8

2714

1352

8.15

5.75

247

193

2891

321

8.0

41.5

52.8

3389

1685

8.01

5.65

308

241

3746

407

250

150

±1.60

4.0

24.3

30.9

2697

1234

9.34

6.32

216

165

2665

275

5.0

30.1

38.4

3304

1508

9.28

6.27

264

201

3285

337

6.0

35.8

45.6

3886

1768

9.23

6.23

311

236

3886

396

8.0

46.5

59.2

4886

2219

9.08

6.12

391

296

5050

504

260

180

±1.80

5.0

33.2

42.4

4121

2350

9.86

7.45

317

261

4695

426

6.0

39.6

50.4

4856

2763

9.81

7.40

374

307

5566

501

8.0

51.5

65.6

6145

3493

9.68

7.29

473

388

7267

642

10.0

63.2

80.6

7363

4174

9.56

7.20

566

646

8850

772

300

200

±2.00

5.0

38.0

48.4

6241

3361

11.4

8.34

416

336

6836

552

6.0

45.0

57.6

7370

3962

11.3

8.29

491

396

8115

651

8.0

59.1

75.2

9389

5042

11.2

8.19

626

504

10627

838

10.0

72.7

92.6

11313

6058

11.1

8.09

754

606

12987

1012

350

250

±2.20

5.0

45.8

58.4

10520

6306

13.4

10.4

601

504

12234

817

6.0

54.7

69.6

12457

7458

13.4

10.3

712

594

14554

967

8.0

71.6

91.2

16001

9573

13.2

10.2

914

766

19136

1253

10.0

88.4

113.0

19407

11588

13.1

10.1

1109

927

23500

1522

400

200

±2.40

5.0

45.8

58.4

12490

4311

14.6

8.60

624

431

10519

742

6.0

54.7

69.6

14789

5092

14.5

8.55

739

509

12069

877

8.0

71.6

91.2

18974

6517

14.4

8.45

949

652

15820

1133

10.0

88.4

113.0

23003

7864

14.3

8.36

1150

786

19368

1373

12.0

104.0

132.0

26248

8977

14.1

8.24

1312

898

22782

1591

400

250

±2.60

5.0

49.7

63.4

14440

7056

15.1

10.6

722

565

14773

937

6.0

59.4

75.6

17118

8352

15.0

10.5

856

668

17580

1110

8.0

77.9

99.2

22048

10744

14.9

10.4

1102

860

23127

1440

10.0

96.2

122.0

26806

13029

14.8

10.3

1340

1042

28423

1753

12.0

113.0

144.0

30766

14926

14.6

10.2

1538

1197

33597

2042

450

250

±2.80

6.0

64.1

81.6

22724

9245

16.7

10.6

1010

740

20687

1253

8.0

84.2

107.0

29336

11916

16.5

10.5

1304

953

27222

1628

10.0

104.0

133.0

35737

14470

16.4

10.4

1588

1158

33473

1983

12.0

123.0

156.0

41137

16663

16.2

10.3

1828

1333

39591

2314

500

300

±3.20

6.0

73.5

93.6

33012

15151

18.8

12.7

1321

1010

32420

1688

8.0

96.7

123.0

42805

19624

18.6

12.6

1712

1308

42767

2202

10.0

120.0

153.0

52328

23933

18.5

12.5

2093

1596

52736

2693

12.0

141.0

180.0

60604

27726

18.3

12.4

2424

1848

62581

3156

550

350

±3.60

8.0

109

139

59783

30040

20.7

14.7

2174

1717

63051

2856

10.0

135

173

73276

36752

20.6

14.6

2665

2100

77901

3503

12.0

160

204

85249

42769

20.4

14.5

3100

2444

92646

4118

14.0

185

236

97269

48731

20.3

14.4

3537

2784

106760

4710

600

400

±4.00

8.0

122

155

80670

43564

22.8

16.8

2689

2178

88672

3591

10.0

151

193

99081

53429

22.7

16.7

3303

2672

109720

4413

12.0

179

228

115670

62391

22.5

16.5

3856

3120

130680

5201

14.0

207

264

132310

71282

22.4

16.4

4410

3564

150850

5962

16.0

235

299

148210

79760

22.3

16.3

4940

3988

170510

6694

注：1.按GB/T 6725—2002冷弯型钢用钢材的牌号和化学成分(熔炼分析)应符合GB/T 699、GB/T 700、GB/T 1591、GB/T 4171、GB/T 4239等标准的规定。根据需方要求也可提供钢材成品化学成分。

2.冷弯型钢一般不进行力学性能和工艺性能试验，按需方要求并在合同中注明，可在原料钢带上进行力学性能及工艺性能试验，并应符合相应标准的规定。

3.冷弯空心型钢用钢带冷弯后焊接而成的。焊缝处不得有开焊、搭焊、烧穿及错位等缺陷。

4.冷弯空心型钢以冷加工状态交货，通常长度为4~12m。

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