SA179 Tubes

AISI 4140 Alloy Steel Tube Supplier

Table of Content

AISI 4140 Tubing, a low-alloy steel marvel, combines manganese, molybdenum, and chromium, setting a benchmark for utility and adaptability. Equivalent materials and grades include EN# 1.7223, EN 42CrMo4, DIN 41CrMo4, BS 970 708M40, UNI 41CrMo4, and JIS SCM 440. This steel grade, unparalleled in usefulness, exhibits superb ductility, superior toughness, and outstanding wear resistance in tempered or quenched conditions.

AISI 4140 boasts a density of 0.284 lb/in³ (7.85 g/cm3) and a melting point of 2580 °F (1416 °C), contributing to its robust properties.

Exceptional impact resistance, high fatigue strength, superb torsional strength, excellent toughness, and remarkable abrasion resistance define AISI 4140, making it a standout choice in various applications.

The presence of molybdenum and chromium ensures excellent corrosion resistance, particularly against chlorides. This makes AISI 4140 suitable for environments where corrosion resistance is crucial. Manganese acts as a deoxidizer, enhancing hardenability and improving machinability. It combines with sulfur, making carburizing more effective.

SA179 Tube stocked Alloy Steel 4140 Tube meets or exceeds stringent industry standards, such as ASTM and SAE, ensuring reliability and performance in diverse applications.

Explore the unparalleled strength and versatility of AISI 4140 Tubing with TubeWell. Our commitment to quality and adherence to industry standards makes us your trusted source for Alloy Steel Tubing. Contact our experts at SA179 Tube to learn more about AISI 4140 Tube and our comprehensive range of services and products. Elevate your projects with TubeWell – Where Quality Meets Excellence.

4140 Tubing Specification

DimensionsASTM, ASME and API

Supplier of 4140 Alloy Steel Tube

in Length

Within 13500 millimeter
Speciality inLarge Diameter Size
Size4 to 219 millimeter W. T.: 0.5 to 20 millimeter
LengthIn Single and Double Random & Cut to Length Suppliers
AISI 4140 Tube TypeWelded / Seamless / Fabricated / ERW
FormRound, Square, Rectangular, Hydraulic.
EndPlain End, Threaded, Beveled End

4140 Steel Tubing Chemical Composition

Element Content (%)
Iron, Fe 96.785 – 97.77
Chromium, Cr 0.80 – 1.10
Manganese, Mn 0.75 – 1.0
Carbon, C 0.380 – 0.430
Silicon, Si 0.15 – 0.30
Molybdenum, Mo 0.15 – 0.25
Sulfur, S 0.040
Phosphorous, P 0.035

4140 Chrome Moly Steel Tube Mechanical Properties

Properties Metric Imperial
Hardness, Vickers (converted from Brinell hardness) 207 207
Tensile strength 655 MPa 95000 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Yield strength 415 MPa 60200 psi
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) 13 13
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 25.70% 25.70%
Shear modulus (typical for steel) 80 GPa 11600 ksi
Hardness, Brinell 197 197
Machinability (based on AISI 1212 as 100 machinability) 65 65
Hardness, Rockwell B (converted from Brinell hardness) 92 92
Hardness, Knoop (converted from Brinell hardness) 219 219

AISI 4140 Steel Pipe Grade Heat Treatment

Annealing800 oC – 850 oC
Normalizing870 oC – 900 oC
Tempering550 oC – 700 oC

4140 Alloy Steel Tube Equivalent Grade

Standard/ GradeUNSTemperSpecification
AISI 4140 Alloy SteelUNS G41400A, N, TAMS6381

Physical Strength of AISI 4140 Round tube

PropertiesMetricImperial
Density7.85 g/cm30.284 lb/in³
Melting point1416°C2580°F

Weight Table of ASTM A519 Grade 4140 Tubes

Size NPS Tube O.D. Wall Thickness Tube I.D. Weight per Foot Standard to XXHY Schedule Tube # Section Modulus Gallon Capacity Per Linear Foot
1/2 0.84 0.109 0.622 0.85 STD 40 .0407 .0158
    0.147 0.546 1.09 XHY 80 .0478 .0122
    0.188 0.464 1.31   160 .0528 .0088
    0.294 0.252 1.72 XXHY   .0577 .0026
3/4 1.05 0.113 0.824 1.13 STD 40 .0705 .0277
    0.154 0.742 1.48 XHY 80 .0853 .0225
    0.219 0.612 1.95   160 .1006 .0153
    0.308 0.434 2.44 XXHY   .1103 .0077
1 1.315 0.133 1.049 1.68 STD 40 .1328 .0449
    0.179 0.957 2.17 XHY 80 .1606 .0374
    0.250 0.815 2.85   160 .1904 .0271
    0.358 0.599 3.66 XXHY   .2136 .0146
1 1/4 1.66 0.140 1.380 2.27 STD 40 .2346 .0777
    0.191 1.278 3.00 XHY 80 .2913 .0666
    0.250 1.160 3.77   160 .3421 .0549
    0.382 0.896 5.22     .4110 .0328
1 1/2 1.90 0.145 1.610 2.72 STD 40 .3262 .1058
    0.200 1.500 3.63 XHY 80 .4118 .0918
    0.281 1.338 4.86   160 .5079 .0730
    0.400 1.100 6.41     .5977 .0494
2 2.375 0.109 2.157 2.64   10 .4205 .1898
    0.154 2.067 3.66 STD 40 .5606 .1743
    0.218 1.939 5.03 XHY 80 .7309 .1534
    0.250 1.875 5.68     .8045 .1434
    0.281 1.813 6.29     .8666 .1344
    0.344 1.687 7.47   160 .9806 .1161
    0.436 1.503 9.04 XXHY   1.1043 .0922
2 1/2 2.875 0.120 2.635 3.53   10 .6870 .2833
    0.203 2.469 5.80 STD. 40 1.0640 .2487
    0.216 2.443 6.14     1.1169 .2435
    0.250 2.375 7.02     1.2468 .2301
    0.276 2.323 7.67 XHY 80 1.3386 .2202
    0.375 2.125 10.02   160 1.6371 .1842
    0.552 1.771 13.71 XXXHY   1.9971 .1280
3 3.50 0.120 3.260 4.34     1.0411 .4336
    0.156 3.188 5.58     1.3122 .4147
    0.172 3.156 6.12     1.4265 .4064
    0.188 3.124 6.66     1.5342 .3984
    0.216 3.068 7.58 STD. 40 1.7241 .3840
    0.250 3.000 8.69     1.9372 .3672
    0.281 2.938 9.67     2.1207 .3521
    0.300 2.900 10.26 XHY 80 2.2253 .3431
    0.438 2.624 14.34   160 2.8774 .2811
    0.600 2.300 18.6 XXHY   3.4243 .2158
3 1/2 4.0 0.120 3.760 4.98   10 1.3776 .5768
    0.226 3.548 9.12 STD. 140 2.3939 .5136
    0.250 3.500 10.02     2.6001 .4998
    0.281 3.438 11.17     2.8562 .4821
    0.318 3.364 12.52 XHY 80 3.1400 .4617
    0.636 2..728 22.87 XXHY   4.8795 .3085
4 4.5 0.120 4.260 5.62   10 1.7612 .7404
    0.156 4.188 7.24     2.2354 .7156
    0.188 4.124 8.67     2.6296 .6942
    0.203 4.094 9.32     2.8173 .6838
    0.219 4.062 10.02     3.0184 .6725
    0.237 4.026 10.80 STD. 40 3.2145 .6613
    0.250 4.000 11.36     3.3611 .6528
    0.281 3.938 12.67   60 3.7021 .6326
    0.312 3.876 13.97     4.0273 .6126
    0.337 3.826 15.00 XHY 80 4.2713 .5972
    0.438 3.624 19.02   120 5.1790 .5361
    0.531 3.438 22.53   160 5.8997 .4822
    0.674 3.152 27.57 XXHY   6.7927 .4054
5 5.563 0.188 5.187 10.80     4.1161 1.0979
    0.219 5.125 12.51     4.7279 1.0716
    0.258 5.047 14.63 STD. 40 5.4500 1.0391
    0.281 5.001 15.87     5.8644 1.0204
    0.312 4.939 17.51     6.4074 .99647
    0.344 4.875 19.19     6.9358 .9696
    0.375 4.813 20.80 XHY 80 7.4300 .9449
    0.500 4.563 27.06   120 9.2534 .8495
    0.625 4.313 32.99   160 10.7976 .7590
    0.750 4.063 38.59 XXHY   12.0954 .6734
6 6.625 0.109 6.407 7.59   5 3.5769 1.6748
    0.134 6.357 9.30   10 4.3475 1.6488
    0.156 6.313 10.79     5.0107 1.6260
    0.188 6.249 12.94     5.9351 1.5937
    0.203 6.219 13.94     6.3804 1.5780
    0.219 6.187 15.00     6.8261 1.5620
    0.250 6.125 17.04     7.6905 1.5306
    0.280 6.065 18.99 STD. 40 8.4958 1.5008
    0.312 6.001 21.06     9.3416 1.4688
    0.344 5.937 23.10     10.111 1.4391
    0.375 5.875 25.05     10.893 1.4082
    0.432 5.761 28.60 XHY 80 12.224 1.3541
    0.500 5.625 32.74     13.711 1.2909
    0.562 5.501 36.43   120 14.9806 1.2346
    0.625 5.375 40.09     16.1821 1.1787
    0.719 5.187 45.39   160 17.8243 1.0977
    0.864 4.897 53.21 XXHY   20.025 .9784
    1.000 4.625 60.13     21.7719 .8727
    1.125 4.375 66.14     23.1237 .7809

Suppliers of UNS G41400 q&t Tube in various Sizes

NB Size OD 40S 5S 10S S10 S20 S40 S60 XS/80S S80 S100 S120 S140 S160 XXS
mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm
1/8″ 10.29 1.2 1.73 2.41
1/4″ 13.72 1.7 2.24 3.02
3/8″ 17.15 1.7 2.31 3.2
15 1/2″ 21.34 2.8 1.7 2.1 2.77 3.73 3.73 4.78 7.47
20 3/4″ 26.67 2.9 1.7 2.1 2.87 3.91 3.91 5.56 7.82
25 1″ 33.4 3.4 1.7 2.8 3.38 4.55 4.55 6.35 9.09
32 1 1/4″ 42.16 3.6 1.7 2.8 3.56 4.85 4.85 6.35 9.7
40 1 1/2″ 48.26 3.7 1.7 2.8 3.68 5.08 5.08 7.14 10.2
50 2″ 60.33 3.9 1.7 2.8 3.91 5.54 5.54 9.74 11.1
65 2 1/2″ 73.03 5.2 2.1 3.1 5.16 7.01 7.01 9.53 14
80 3″ 88.9 5.5 2.1 3.1 5.49 7.62 7.62 11.1 15.2
90 3 1/2″ 101.6 5.7 2.1 3.1 5.74 8.08 8.08
100 4″ 114.3 6 2.1 3.1 6.02 8.56 8.56 11.1 13.5 17.1
125 5″ 141.3 6.6 2.8 3.4 6.55 9.53 9.53 12.7 15.9 19.1
150 6″ 168.3 7.1 2.8 3.4 7.11 10.97 11 14.3 18.3 22
200 8″ 219.1 8.2 2.8 3.8 6.4 8.18 10.3 12.7 12.7 15.1 19.3 20.6 23 22.2
250 10″ 273.1 9.3 3.4 4.2 6.4 9.27 12.7 12.7 15.1 19.3 21.4 25.4 28.6 25.4
300 12″ 323.9 9.5 4 4.6 6.4 10.3 14.3 12.7 17.5 21.4 25.4 28.6 33.3 25.4
350 14″ 355.6 9.5 4 4.8 6.4 7.9 11.1 15.1 12.7 19.1 23.8 27.8 31.8 35.7
400 16″ 406.4 9.5 4.2 4.8 6.4 7.9 12.7 16.7 12.7 21.4 26.2 31 36.5 40.5
450 18″ 457.2 9.5 4.2 4.8 6.4 7.9 14.3 19.1 12.7 23.8 29.4 34.9 39.7 45.2
500 20″ 508 9.5 4.8 5.5 6.4 9.5 15.1 20.6 12.7 26.2 32.5 38.1 44.5 50
550 22″ 558.8 9.5 4.8 5.5 6.4 9.5 22.2 12.7 28.6 34.9 41.3 47.6 54
600 24″ 609.6 9.5 5.5 6.4 6.4 9.5 17.5 24.6 12.7 31 38.9 46 52.4 59.5
650 26″ 660.4 9.5 7.9 13 12.7
700 28″ 711.2 9.5 7.9 13 12.7
750 30″ 762 9.5 6.4 7.9 7.9 13 12.7
800 32″ 812.8 9.5 7.9 13 17.5 12.7
850 34″ 863.6 9.5 7.9 13 17.5 12.7
900 36″ 914.4 9.5 7.9 13 19.1 12.7

Mechanical Analysis Requirements for 4140 Square Tube Heat-Treated

Mechanical Property Designation R S S *T U V W
Limited Ruling Section mm 250 250 150 100 63 30 20
Tensile Strength Mpa Min 700 770 770 850 930 1000 1080
Max 850 930 930 1000 1080 1150 1230
0.2% Proof Stress Mpa Min 480 540 570 655 740 835 925
Elongation on 5.65√S0 % Min 15 13 15 13 12 12 12
Izod Impact J Min 34 27 54 54 47 47 40
Charpy Impact J Min 28 22 50 50 42 42 35
Hardness Brinell HB Min 201 233 233 248 269 293 311
Max 255 277 277 302 331 352 375
*Material stocked generally in condition T Check test certificate if critical for end use.

Pre-heat temperature for 4140 Dom Tubing

Section25mm40mm50mm75mm150mm +
oC370400425455510

Applications of 4140 Tubing

Oil and Gas Exploration: 4140 Tubing plays a pivotal role in the oil and gas sector, finding application in drill collars, tool joints, and critical components that navigate the challenging environments of exploration and extraction. Its high-stress resistance ensures reliability in demanding conditions.

Structural Fabrication: In the realm of structural components and machinery parts, 4140 Tubing emerges as a versatile choice. Its adaptability allows for seamless integration into diverse structural frameworks, contributing to the strength and resilience of industrial equipment.

High-Strength Fasteners: Machinability is a standout feature of 4140 Tubing, making it a preferred material for the production of high-strength fasteners. This application showcases its precision and reliability, meeting the stringent requirements of various industrial assemblies.

Aerospace Engineering: The aerospace industry benefits from the robust qualities of 4140 Tubing, utilizing it in the fabrication of components that demand high strength, toughness, and resistance to fatigue. Its ability to withstand stress makes it a valuable asset in aerospace applications.

Automotive Manufacturing: In the automotive sector, 4140 Tubing finds application in critical components that require strength, durability, and the ability to withstand varying stresses. Its use contributes to the reliability and performance of automotive systems.

Machinery and Equipment: Across diverse industries, 4140 Tubing serves in the fabrication of machinery and equipment. Its resilience under high stress, coupled with its machinability, makes it a go-to material for creating components that endure rigorous operational conditions.

Supply and Exporter of Alloys Steel A335 P5 Pipes in Cities like

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Supply and Exporter of Alloys Steel A335 P5 Pipes in Countries like

Taiwan, Mexico, Iran, Namibia, Afghanistan, Netherlands, Nepal, Ireland, Libya, Morocco, Iran, Switzerland, Finland, Slovakia, Pakistan, Australia, Serbia, Angola, China, Philippines, Czech Republic, Belgium, Estonia, Costa Rica, Croatia, Sweden, Venezuela, Colombia, India, Belarus, Jordan, Azerbaijan, Mongolia, Vietnam, Ghana, Iraq, Algeria, Puerto Rico, New Zealand, Singapore, Indonesia, Ukraine, Israel, Mexico, Hong Kong, Bhutan, Germany, Brazil, Plan, Yemen, Malasiya, USA, Cambodia, Laos, Uganda, Tanzania, Sudan, Democratic Republic of Congo, zambia, Ethiopia, Brunei, Madagascar, Niger, Mali, Bangladesh, Bolivia, United States, Ecuador, Lebanon, Italy, South Korea, Denmark, Norway, Sri Lanka, Zimbabwe, Japan, Yemen, Oman, Portugal, Lithuania, Canada, Macau, Bahrain, Austria, Bulgaria, Spain, Kenya, United Kingdom, United Arab Emirates, Kazakhstan, Egypt, Saudi Arabia, Gambia, Argentina, Romania, Tibet, France, Chile, Gabon, South Africa, Trinidad & Tobago,Tunisia, Turkey, Nigeria, Peru, Russia, Chile, Nigeria, Hungary, Qatar, Greece, Malaysia, Kuwait, Poland, Thailand, Poland.
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