NTS Product Guide Booklet

DOM

Welded and Drawn Over
Mandrel Carbon Steel Tubing
ASTM A-513/5
< .156 Walls C1020
≥ .156 Walls C1026
ST52.3 ≥ .156” walls

CDS

Cold Drawn Seamless
Carbon Steel Tubing
ASTM A-519
Available grades 1026,
ST52.3, 4130

ALY

Hot-Finish Seamless Alloy
4140/42 Alloy Steel Tubing
Annealed or Heat Treated
ASTM A-519

HFS

Hot-Finish C1026
or A106 B/C Carbon
Mechanical Tubing
ASTM A-519

Seamless Carbon Steel Pipe

Variations in Outside Diameter
A106
NPS Designator
Permissible Variations in Outside Diameter
Over Inches
Permissible Variations in Outside Diameter
Under Inches
1/8 to 1 1/2, incl 1/64 (0.015) 1/64 (0.015)
Over 1 1/2 to 4, incl 1/32 (0.031) 1/32 (0.031)
Over 4 to 8, incl 1/16 (0.062) 1/32 (0.031)
Over 8 to 10, incl 3/32 (0.093) 1/32 (0.031)
Over 10 1% 1%

Decimal Equivalents

B.W.G or Fraction Decimal
36 .004
35 .005
34 .007
33 .008
32 .009
31 .010
30 .012
29 .013
28 .014
1/64 .016
27 .016
26 .018
25 .020
24 .022
23 .025
22 .028
1/32 .031
21 .032
B.W.G or Fraction Decimal
20 .035
19 .042
3/64 .047
18 .049
17 .058
1/16 .063
16 .065
15 .072
5/64 .078
14 .083
3/32 .094
13 .095
7/64 .109
12 .109
11 .120
1/8 .125
10 .134
9/64 .141
B.W.G or Fraction Decimal
9 .148
5/32 .156
8 .165
11/64 .172
7 .180
3/16 .188
13/64 .203
6 .203
7/32 .219
5 .220
4 .238
1/4 .250
3 .259
9/32 .281
2 .284
1 .300
5/16 .313
0 .340
B.W.G or Fraction Decimal
11/32 .344
3/8 .375
00 .380
000 .425
7/16 .438
0000 .454
1/2 .500
17/32 .531
9/16 .563
19/32 .594
5/8 .625
11/16 .688
3/4 .750
13/16 .813
7/8 .875
15/16 .938
1 1.000
2 2.000
Common Metric Conversion Factors
10 millimeters = 1 centimeter
100 centimeters = 1 meter
1000 grams = 1 kilogram
1 centimeter = .3937 inch
1 meter = 3.281 feet
1 kilogram = 2.2046 pounds
1 inch = 2.540 centimeters
1 foot = 30.48 centimeters
1 kg/cm2 = 14.22 psi

All information contained herein is based on technical data that National Tube Supply believes to be reliable. The information is provided without any representation or warranty, expressed or implied, regarding its accuracy or correctness. Such information is intended only for use by persons having skill and know-how and is to be used by such persons only at their own discretion and risk. National Tube Supply does not assume responsibility, and expressly disclaims liability for loss, damage, or expense arising out of, or in any way incurred, from the direct or indirect use of such information. Such information is not to be taken as a license to operate under, or intended to suggest infringement of any patent.

Seamless Mechanical Tube Tolerance

Cold Drawn Round Carbon Steel
Diameter Tolerances
OD Size
Range Inches		 Wall: Percent
of OD		 Unannealed or Stress
Relief Annealed
OD Inches
Plus | Minus		 Unannealed or Stress
Relief Annealed
ID Inches
Plus | Minus		 Soft Annealed
or Normalized
OD Inches
Plus | Minus		 Soft Annealed
or Normalized
ID Inches
Plus | Minus		 Oil Quenched & Tempered
OD & ID Inches
Plus | Minus
Up to 0.499 All .004 | .000 .005 | .002 .005
0.500 – 1.699 All .005 | .000 .000 | .005 .007 | .002 .002 | .007 .007
1.700 – 2.099 All .006 | .000 .000 | .006 .006 | .005 .005 | .006 .008
2.100 – 2.499 All .007 | .000 .000 | .007 .008 | .005 .005 | .008 .009
2.500 – 2.899 All .008 | .000 .000 | .008 .009 | .005 .005 | .009 .010
2.900 – 3.299 All .009 | .000 .000 | .009 .011 | .005 .005 | .011 .012
3.300 – 3.699 All .010 | .000 .000 | .010 .013 | .005 .005 | .013 .013
3.700 – 4.099 All .011 | .000 .000 | .011 .013 | .007 .010 | .010 .014
4.100 – 4.499 All .012 | .000 .000 | .012 .014 | .007 .011 | .011 .015
4.500 – 4.899 All .013 | .000 .000 | .013 .016 | .007 .012 | .012 .017
4.900 – 5.299 All .014 | .000 .000 | .014 .018 | .007 .013 | .013 .018
5.300 – 5.549 All .015 | .000 .000 | .015 .020 | .007 .014 | .014 .019
5.550 – 5.999 Under 6
6 to 7 1/2
Over 7 1/2		 .010 | .010
.009 | .009
.018 | .000		 .010 | .010
.009 | .009
.009 | .009		 .018 | .018
.016 | .016
.017 | .015		 .018 | .018
.016 | .016
.016 | .016		 .025
.023
.023
6.000 – 6.499 Under 6
6 to 7 1/2
Over 7 1/2		 .013 | .013
.010 | .010
.020 | .000		 .013 | .013
.010 | .010
.010 | .010		 .023 | .023
.018 | .018
.020 | .015		 .023 | .023
.018 | .018
.018 | .018		 .033
.025
.025
6.500 – 6.999 Under 6
6 to 7 1/2
Over 7 1/2		 .015 | .015
.012 | .012
.012 | .012		 .015 | .015
.012 | .012
.012 | .012		 .027 | .027
.021 | .021
.021 | .021		 .027 | .027
.021 | .021
.021 | .021		 .038
.029
.029
7.000 – 7.499 Under 6
6 to 7 1/2
Over 7 1/2		 .018 | .018
.013 | .013
.026 | .000		 .018 | .018
.013 | .013
.013 | .013		 .032 | .032
.023 | .023
.031 | .015		 .032 | .032
.023 | .023
.023 | .023		 .045
.033
.033
7.500 – 7.999 Under 6
6 to 7 1/2
Over 7 1/2		 .020 | .020
.015 | .015
.029 | .000		 .020 | .020
.015 | .015
.015 | .015		 .035 | .035
.026 | .026
.036 | .015		 .035 | .035
.026 | .026
.026 | .026		 .050
.037
.037
8.000 – 8.499 Under 6
6 to 7 1/2
Over 7 1/2		 .023 | .023
.016 | .016
.031 | .000		 .023 | .023
.016 | .016
.015 | .016		 .041 | .041
.028 | .028
.033 | .022		 .041 | .041
.028 | .028
.028 | .028		 .058
.040
.040
8.500 – 8.999 Under 6
6 to 7 1/2
Over 7 1/2		 .025 | .025
.017 | .017
.034 | .000		 .025 | .025
.017 | .017
.015 | .017		 .044 | .044
.030 | .030
.038 | .022		 .044 | .044
.030 | .030
.030 | .030		 .063
.043
.043
9.000 – 9.499 Under 6
6 to 7 1/2
Over 7 1/2		 .028 | .028
.019 | .019
.037 | .000		 .028 | .028
.019 | .019
.015 | .022		 .045 | .045
.033 | .033
.043 | .022		 .049 | .049
.033 | .033
.033 | .033		 .070
.047
.047
9.500 – 9.999 Under 6
6 to 7 1/2
Over 7 1/2		 .030 | .030
.020 | .020
.040 | .000		 .030 | .030
.020 | .020
.015 | .025		 .045 | .045
.035 | .035
.048 | .022		 .053 | .053
.035 | .035
.035 | .035		 .075
.050
.050
10.000 – 10.999 Under 6
6 to 7 1/2
Over 7 1/2		 .034 | .034
.022 | .022
.044 | .000		 .034 | .034
.022 | .022
.015 | .029		 .045 | .045
.022 | .039
.055 | .022		 .060 | .060
.039 | .039
.039 | .039		 .080
.055
.055
11.000 – 12.000 Under 6
6 to 7 1/2
Over 7 1/2		 .035 | .035
.025 | .025
.045 | .000		 .035 | .035
.025 | .025
.015 | .035		 .050 | .050
.045 | .045
.035 | .060		 .065 | .065
.045 | .045
.045 | .045
Wall Thickness Range as % of Outside Diameter
Wall Thickness Tolerance over and Under Nominal, %
Up to 1.499″ ID | 1.500″ and Over
25 and Under 10.0 | 7.5
Over 25 12.5 | 10.0

Tabulated tolerances can be applied simultaneously to only two of three cross-sectional dimensions, i.e., OD x Wall, OD x ID, or ID x Wall. ID tolerances apply only to tube specified OD x ID or ID x Wall… and to dimensions. 0.625” and over when ID is at least half the OD. Wall thickness less than 3% of OD require added ovality tolerances of plus and minus ½% of mean OD. If water quench and temper is required or specified – refer to mill for applicable tolerances.

DOM Mechanical Steel Tube Tolerances (Diameter)

Cold Drawn Round Welded & Drawn Over Mandrel
Diameter Tolerances
OD Size Range Inches Wall: Percent of OD OD Inches
Plus | Minus		 In Inches
Plus | Minus
Up to 0.499 All .004 | .000
0.500 – 1.699 All .005 | .000 .000 | .005
1.700 – 2.099 All .006 | .000 .000 | .006
2.100 – 2.499 All .007 | .000 .000 | .007
2.500 – 2.899 All .008 | .000 .000 | .008
2.900 – 3.299 All .009 | .000 .000 | .009
3.300 – 3.699 All .010 | .000 .000 | .010
3.700 – 4.099 All .011 | .000 .000 | .011
4.100 – 4.499 All .012 | .000 .000 | .012
4.500 – 4.899 All .013 | .000 .000 | .013
4.900 – 5.299 All .014 | .000 .000 | .014
5.300 – 5.549 All .015 | .000 .000 | .015
5.550 – 5.999 Under 6
6 to 7 1/2		 .010 | .010
.009 | .009		 .010 | .010
.009 | .009
6.000 – 6.499 Under 6
6 to 7 1/2		 .013 | .013
.010 | .010		 .013 | .013
.010 | .010
6.500 – 6.999 Under 6
6 to 7 1/2		 .015 | .015
.012 | .012		 .015 | .015
.012 | .012
7.000 – 7.499 Under 6
6 to 7 1/2		 .018 | .018
.013 | .013		 .018 | .018
.013 | .013
7.500 – 7.999 Under 6
6 to 7 1/2		 .020 | .020
.015 | .015		 .020 | .020
.015 | .015
8.000 – 8.499 Under 6
6 to 7 1/2		 .023 | .023
.016 | .016		 .023 | .023
.016 | .016
8.500 – 8.999 Under 6
6 to 7 1/2		 .025 | .025
.017 | .017		 .025 | .025
.017 | .017
9.000 – 9.499 Under 6
6 to 7 1/2		 .028 | .028
.019 | .019		 .028 | .028
.019 | .019
9.500 – 9.999 Under 6
6 to 7 1/2		 .030 | .030
.020 | .020		 .030 | .030
.020 | .020
10.000 – 10.999 Under 6
6 to 7 1/2		 .034 | .034
.022 | .022		 .034 | .034
.022 | .022
11.000 – 11.999 Under 6
6 to 7 1/2		 .035 | .035
.025 | .025		 .035 | .035
.025 | .025
12.000 – 12.999 Under 6
6 to 7 1/2		 .036 | .036
.027 | .027		 .036 | .036
.027 | .027
13.000 – 13.999 Under 6
6 to 7 1/2		 .037 | .037
.029 | .029		 .037 | .037
.029 | .029
14.000 – 15.000 Under 6
6 to 7 1/2		 .038 | .038
.030 | .030		 .038 | .038
.030 | .030

Straightness Tolerance

.030” in any 3ft of length up to 7.500” OD
.060” in any 3ft of length up to 7.500” OD

Tabulated tolerances can be applied simultaneously to only two of three cross-sectional dimensions, i.e. OD x Wall, OD x ID, or ID x Wall.

ID Tolerances apply only to tube specified OD x ID or ID x Wall.

DOM Mechanical Steel Tube Tolerances (Wall)

Cold Drawn Round Welded & Drawn Over Mandrel
Wall Tolerances
Wall Thickness,
Inches		 Including .375 to
.875 OD		 Over .875 to
1.875 OD		 Over 1.875 to
3.750 OD		 Over 3.750 to
15.000 OD
.028 & .035 +.002
-.002		 +.002
-.002		 +.002
-.002
.049 +.002
-.002		 +.002
-.003		 +.002
-.003
.065 +.002
-.002		 +.002
-.003		 +.002
-.003		 +.004
-.004
.083 +.002
-.002		 +.002
-.003		 +.003
-.003		 +.004
-.005
.095 +.002
-.002		 +.002
-.003		 +.003
-.003		 +.004
-.005
.109 +.002
-.003		 +.002
-.004		 +.003
-.003		 +.005
-.005
.120 +.003
-.003		 +.002
-.004		 +.003
-.003		 +.005
-.005
.134 +.002
-.004		 +.003
-.003		 +.005
-.005
.148 +.002
-.004		 +.003
-.003		 +.005
-.005
.165 +.003
-.004		 +.003
-.004		 +.005
-.006
.180 +.004
-.004		 +.003
-.005		 +.006
-.006
.203 +.004
-.005		 +.004
-.005		 +.006
-.007
.220 +.004
-.006		 +.004
-.006		 +.007
-.007
.238 +.005
-.006		 +.005
-.006		 +.007
-.007
.259 +.005
-.006		 +.005
-.006		 +.007
-.007
.284 +.005
-.006		 +.005
-.006		 +.007
-.007
.300 +.006
-.006		 +.006
-.006		 +.008
-.008
.320 +.007
-.007		 +.007
-.007		 +.008
-.008
.344 +.008
-.008		 +.008
-.008		 +.009
-.009
.375 +.009
-.009		 +.009
-.009
.400 +.010
-.010		 +.010
-.010
.438 +.011
-.011		 +.011
-.011
.480 +.012
-.012		 +.012
-.012
.531 +.013
-.013		 +.013
-.013
.563 +.013
-.013		 +.013
-.013
.580 +.014
-.014		 +.014
-.014
.600 +.015
-.015		 +.015
-.015
.625 +.016
-.016		 +.016
-.016
.650 +.017
-.017

Outside Diameter Tolerances for Round Hot-Finish Tubing

A519
Outside Diameter
Size Range, in.		 Outside Diameter Tolerance, in.
Over | Under
Up to 2.999 0.020 | 0.020
3.000 – 4.499 0.025 | 0.025
4.500 – 5.999 0.031 | 0.031
6.000 – 7.499 0.037 | 0.037
7.500 – 8.999 0.045 | 0.045
9.000 – 10.750 0.050 | 0.050

A:

Diameter tolerances are not applicable to normalized and tempered or quenched and tempered conditions.

B:

The common range of sizes of hot finish tubes in 1½” to 10¾” outside diameter with wall thickness at least 3% or more of outside diameter, but not less than 0.095”.

C:

Larger sizes are available; consult manufacturer for sizes and tolerances.

Chemical Requirements

A106
Chemical Composition, %
Grade B		 Composition, %
Grade C		 Composition, %
Carbon, maxA 0.30 0.35 0.35
Manganese 0.29 – 1.06 0.29 – 1.06 0.29 – 1.06
Phosphorus, max 0.035 0.035 0.035
Sulfur, max 0.035 0.035 0.035
Silicon, min 0.10 0.10 0.10
Chrome, maxB 0.40 0.40 0.40
Copper, maxB 0.40 0.40 0.40
Molybdenum, maxB 0.15 0.15 0.15
Nickel, maxB 0.40 0.40 0.40
Vanadium, maxB 0.08 0.08 0.08

A:

For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.

B:

Unless otherwise specified by the purchaser, for each reduction of 0.01% below the specified carbon maximum, and increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65%.

C:

These five elements combined shall not exceed 1%.

Wall Thickness Tolerances for Round Hot-Finish Tubing

A519
Wall Thickness Range as Percent of Outside Diameter Outside Diameter 2.999″ and Smaller Outside Diameter 3.000″ to 5.999″ Outside Diameter 6.000″ to 10.750″
Under 15 12.5 10.0 10.0
15 and over 10.0 7.5 10.0

A:

Wall Thickness tolerances may not be applicable to walls 0.199” and less; consult manufacturer for wall tolerances on such tube sizes.

Typical Chemistry Percentages by Grade

    Carbon Manganese Phosphorus, Max Sulfur, Max Silicon Aluminum
1020 HF Seamless 0.18 – 0.23 0.30 – 0.60 0.040 0.050    
1020 CD Seamless 0.18 – 0.23 0.30 – 0.60 0.040 0.050    
1020 Welded SRA 0.17 – 0.23 0.30 – 0.60 0.035 0.035    
1026 HF Seamless 0.22 – 0.28 0.60 – 0.90 0.040 0.050    
1026 CD Seamless 0.22 – 0.28 0.60 – 0.90 0.040 0.050    
1026 Welded SRA 0.22 – 0.28 0.60 – 0.90 0.035 0.035    
ST52.3 Welded SRA 0.12 – 0.18 1.20 – 1.60 0.025 0.025 0.15 – 0.35 .02 min
4140/42 HF Seamless 0.38 – 0.45 0.75 – 1.00 0.040 0.040 0.15 – 0.35  

Typical Physical Percentages by Grade

    Yield Tensile Elongation (%) Hardness Rb Charpy Impact
(ft – lb @ -20C)
1020 HF Seamless 28,000 48,000 30 50  
1020 CD Seamless 60,000 70,000 5 75  
1020 Welded SRA 55,000 65,000 10 75  
1026 HF Seamless 35,000 60,000 25 70  
1026 CD Seamless 75,000 90,000 10 90  
1026 Welded SRA 65,000 75,000 10 80  
ST52.3 Welded SRA 75,000 85,000 18 85  
4140/42 HF Seamless 60,000 80,000 25 85 20

Pipe Dimensions and Weights

Carbon and Alloy
Pipe Size OD in Inches 5 10 20 30 STD 40 60 E.H. 80 100 120 140 160 Double E.H.
1/8 .405 .035
.1383		 .049
.1863		 .068
.2447		 .068
.2447		 .095
.3145		 .095
.3145
1/4 .540 .049
.2570		 .065
.3297		 .088
.4248		 .088
.4248		 .119
.5351		 .119
.5351
3/8 .675 .049
.3276		 .065
.4234		 .091
.5676		 .091
.5676		 .126
.7388		 .126
.7388
1/2 .840 .065
.5380		 .083
.6710		 .109
.8510		 .109
.8510		 .147
1.088		 .147
1.088		 .187
1.304		 .294
1.714
3/4 1.050 .065
.6838		 .083
.8572		 .113
1.131		 .113
1.131		 .154
1.474		 .154
1.474		 .218
1.937		 .308
2.441
1 1.315 .065
.8678		 .109
1.404		 .133
1.679		 .133
1.679		 .179
2.172		 .179
2.172		 .250
2.844		 .358
3.659
1 1/4 1.660 .065
1.107		 .109
1.806		 .140
2.273		 .140
2.273		 .191
2.997		 .191
2.997		 .250
3.765		 .382
5.214
1 1/2 1.900 .065
1.274		 .109
2.085		 .145
2.718		 .145
2.718		 .200
3.631		 .200
3.631		 .281
4.859		 .400
6.408
2 2.375 .065
1.604		 .109
2.638		 .154
3.653		 .154
3.653		 .218
5.022		 .218
5.022		 .344
7.462		 .436
9.029
2 1/2 2.875 .083
2.475		 .120
3.531		 .203
5.793		 .203
5.793		 .276
7.661		 .276
7.661		 .375
10.01		 .552
13.69
3 3.500 .083
3.029		 .120
4.332		 .216
7.576		 .216
7.576		 .300
10.25		 .300
10.25		 .438
14.30		 .600
18.58
3 1/2 4.000 .083
3.472		 .120
4.973		 .226
9.109		 .226
9.109		 .318
12.50		 .318
12.50		 .636
22.85
4 4.500 .083
3.915		 .120
5.613		 .237
10.79		 .237
10.79		 .337
14.98		 .337
14.98		 .438
19.00		 .531
22.51		 .674
27.54
4 1/2 5.000 .247
12.54		 .355
17.61
5 5.563 .109
6.349		 .134
7.770		 .258
14.62		 .258
14.62		 .375
20.78		 .375
20.78		 .500
27.04		 .625
32.96		 .750
38.55
6 6.625 .109
7.585		 .134
9.289		 .280
18.97		 .280
18.97		 .432
28.57		 .432
28.57		 .562
36.39		 .719
45.35		 .864
53.16
7 7.625 .301
23.54		 .500
38.04		 .875
63.08
8 8.625 .109
9.914		 .148
1340		 .250
22.36		 .277
24.70		 .322
28.55		 .322
28.55		 .406
35.64		 .500
43.39		 .500
43.39		 .594
50.95		 .719
60.71		 .812
67.76		 .906
74.69		 .875
72.42
9 9.625 .342
33.91		 .500
48.73
10 10.75 .134
15.19		 .165
18.70		 .250
28.04		 .307
34.24		 .365
40.48		 .365
40.48		 .500
54.74		 .500
54.74		 .594
64.43		 .719
77.03		 .844
89.29		 1.000
104.1		 1.125
115.6		 1.000
104.1
11 11.75 .375
45.56		 500
60.08
12 12.75 .165
22.18		 .180
24.16		 .250
33.38		 .330
43.77		 .375
49.56		 .406
53.52		 .562
73.15		 .500
65.42		 .688
88.63		 .844
107.3		 1.000
125.5		 1.125
139.67		 1.312
160.3		 1.000
125.5
14 14.00 .250
36.71		 .312
45.61		 .375
54.57		 .375
54.57		 .438
63.44		 .594
85.05		 .500
72.09		 .750
106.1		 .938
130.9		 1.094
150.8		 1.250
170.2		 1.406
189.1
16 16.00 .250
42.05		 .312
52.27		 .375
62.58		 .375
62.58		 .500 82.77 .656
107.5		 .500
82.77		 .844
136.6		 1.031
164.8		 1.219
192.4		 1.438
233.6		 1.594
245.3
18 18.00 .250
47.39		 .312
58.94		 .438
82.15		 .375
70.59		 .562
104.7		 .750
138.2		 .500
93.45		 .938
170.9		 1.156
208.0		 1.375
244.1		 1.562
274.2		 1.781
308.5
20 20.00 .250
52.73		 .375
78.60		 .500
104.1		 .375
78.60		 .594
123.1		 .812
166.4		 .500
104.1		 1.031
208.9		 1.281
256.1		 1.500
296.4		 1.750
341.1		 1.969
379.2
24 24.00 .250
63.41		 .375
94.62		 .562
140.7		 .375
94.62		 .688
171.3		 .969
238.4		 .500
125.5		 1.219
296.6		 1.531
367.4		 1.812
429.47		 2.062
483.1		 2.344
542.1