Preferred numbers of nominal diameter of wire

according to DIN ISO 4782

Metal_Wire_0.6_MB_.pdf

 

 

1

2

3

4

5

 Nominal wire diameter

 ISO 4782

R 10 and
R 20

 if needed

R 40

 cross section

correct  
equivalent

 commonly
used

USA wire
diameters

mm

mm

mm²

inch

inch

0.020

0.020

0.00031

.00079

.0008

 

0.021

0.00035

.00083

 

0.022

0.022

0.00038

.00087

.0009

 

0.024

0.00045

.00094

 

0.025

0.025

0.00049

.00098

.0010

 

0.026

0.00053

.00102

 

0.028

0.028

0.00062

.00110

.0011

 

0.030

0.00071

.00118

.0012

0.032

0.032

0.00080

.00126

.0013

 

0.034

0.00091

.00134

 

0.036

0.036

0.00102

.00142

.0014

 

0.038

0.00113

.00150

.0015

0.040

0.040

0.00126

.00157

.0016

 

0.042

0.00139

.00165

 

0.045

0.045

0.00159

.00177

.0018

 

0.048

0.00181

.00189

.0019

0.050

0.050

0.00196

.00197

.0020

 

0.053

0.00221

.00209

.0021

0.056

0.056

0.00246

.00220

.0022

 

0.060

0.00283

.00236

.0024

0.063

0.063

0.00312

.00248

.0025

 

0.067

0.00353

.00264

.0026

0.071

0.071

0.00396

.00280

.0028

 

0.075

0.00442

.00295

.0030

0.080

0.080

0.00503

.00315

.0032

 

0.085

0.00567

.00335

.0034

0.090

0.090

0.00636

.00354

.0035

 

0.095

0.00709

.00374

.0037

0.100

0.100

0.00785

.00394

.0040

 

0.106

0.00882

.00417

 

0.112

0.112

0.00985

.00441

.0045

 

0.118

0.01094

.00465

 

0.125

0.125

0.01227

.00492

.0050

 

0.132

0.01368

.00520

 

0.140

0.140

0.01539

.00551

.0055

 

0.150

0.01767

.00591

.0060

0.160

0.160

0.02011

.00630

.0063

 

0.170

0.02270

.00669

.0065

0.180

0.180

0.02545

.00709

.0071

 

0.190

0.02835

.00748

.0075

0.200

0.200

0.03142

.00787

.0080

 

0.212

0.03530

.00835

.0085

0.224

0.224

0.03941

.00882

.0090

 

0.236

0.04374

.00929

 

0.250

0.250

0.04909

.00984

.0100

 

0.265

0.05515

.01043

 

0.280

0.280

0.06158

.01102

.011

 

0.300

0.07069

.01181

.012

0.315

0.315

0.07793

.01240

.0125

 

0.335

0.08814

.01319

.013

0.355

0.355

0.09898

.01398

.014

 

0.375

0.11045

.01476

.015

0.400

0.400

0.12566

.01575

.016

 

0.425

0.14186

.01673

.017

0.450

0.450

0.15904

.01772

.018

 

0.475

0.17721

.01870

 

0.500

0.500

0.19635

.01969

.020

 

0.530

0.22062

.02087

.021

0.560

0.560

0.24630

.02205

.022

 

0.600

0.28274

.02362

 

0.630

0.630

0.31172

.02480

.025

 

0.670

0.35257

.02638

 

0.710

0.710

0.39592

.02795

.028

 

0.750

0.44179

.02953

 

0.800

0.800

0.50265

.03150

.032

 

0.850

0.56745

.03346

 

0.900

0.900

0.63617

.03543

.035

 

0.950

0.70882

.03740

 

1.000

1.000

0.78540

.03937

.040

 

1.060

0.88247

.04173

 

1.120

1.120

0.98520

.04409

.045

 

1.180

1.09359

.04646

.047

1.250

1.250

1.22718

.04921

.050

 

1.320

1.36848

.05197

 

1.400

1.400

1.53938

.05512

.055

 

1.500

1.76715

.05906

 

1.600

1.600

2.01062

.06299

.063

 

1.700

2.26980

.06693

 

1.800

1.800

2.54469

.07087

.071

 

1.900

2.83529

.07480

 

2.000

2.000

3.14159

.07874

.080

 

2.120

3.52989

.08346

 

2.240

2.240

3.94081

.08819

.090

 

2.360

4.37435

.09291

.093

2.500

2.500

4.90874

.09843

.100

 

2.650

5.51546

.10433

.105

2.800

2.800

6.15752

.11024

.110

 

3.000

7.06858

.11811

.120

3.150

3.150

7.79311

.12402

.125

 

3.350

8.81413

.13189

.135

3.550

3.550

9.89798

.13976

.140

 

3.750

11.04466

.14764

.148

4.000

4.000

12.56637

.15748

.160

 

4.250

14.18625

.16732

 

4.500

4.500

15.90431

.17717

.180

 

4.750

17.72055

.18701

.192

5.000

5.000

19.63495

.19685

.200

 

5.300

22.06183

.20866

.207

5.600

5.600

24.63009

.22047

.220

 

6.000

28.27433

.23622

 

6.300

6.300

31.17245

.24803

.250

 

6.700

35.25652

.26378

 

7.100

7.100

39.59192

.27953

 

 

7.500

44.17865

.29528

 

8.000

8.000

50.26548

.31496

.315

 

8.500

56.74502

.33465

 

9.000

9.000

63.61725

.35433

 

 

9.500

70.88218

.37402

 

10.00

10.000

78.53982

.39370

.400

 

10.600

88.24734

.41732

 

11.20

11.200

98.52035

.44094

 

 

11.800

109.35884

.46457

 

12.50

12.500

122.71846

.49213

.500

 

13.200

136.84778

.51969

 

14.00

14.000

153.93804

.55118

 

 

15.000

176.71459

.59055

 

16.00

16.000

201.06193

.62992

.630

 

17.000

226.98007

.66929

 

18.00

18.000

254.46900

.70866

 

 

19.000

283.52874

.74803

 

20.00

20.000

314.15927

.78740

.800

 

21.200

352.98935

.83465

 

22.40

22.400

394.08138

.88189

 

 

23.600

437.43536

.92913

 

25.00

25.000

490.87385

.98425

1.000

 

 

Preferred numbers ISO 3: 1973  (DIN 323-1: 1974)

These preferred numbers are used for wire diameters as well as for apertures of woven wire cloth.

Preferred numbers are the conventionally rounded off term values of geometrical series, including the integral powers of 10 and having as ratios the following factors:

 

Formula to calculate the wire cross diameter A (mm2):

 

Formula to determine the wire length L (m/kg):

(Reference: ISO 4782, Oktober 1993)

ρ = material density in kg/m3

 

 

Examples for Steel, ρ = 7850 kg/m3 *:

 Wire diameter

d

mm

 Cross section

A

mm²

Running length

L

m/kg 

0.02

0.000314159

405490.30087

0.2

0.031415927

4054.90301

2

3.141592654

40.54903

20

314.1592654

0.40549

* Further material densities see ISO 4782, Table 2

 

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