4140 Tubing Supplier | 4140 Chrome Moly Steel



4140 Chrome Moly Steel, 4140 seamless tubing, 4140 chromoly tubing, 4140 chrome moly steel tubing, 4140 Steel Tube, 4140 chemical composition, 4140 equivalent material


4140 Alloy Tubing

4140 alloy tubing is a type of steel tubing made from a low-alloy steel that contains chromium, molybdenum, and manganese. It is also referred to as chrome-moly tubing or chromoly tubing.

4140 Chrome Moly Steel is known for its high strength and toughness, making it a popular choice in applications that require high-stress resistance. It is commonly used in the manufacture of drill collars, tool joints, and other components in the oil and gas industry. 4140 tubing is also used in the manufacture of structural components and machinery parts, as well as in the production of high-strength fasteners.


It can be easily welded, machined, and formed into various shapes, making it a versatile material for a wide range of applications. In addition to its strength and toughness, 4140 alloy tubing also offers good wear resistance, making it suitable for use in abrasive environments.

It also has excellent fatigue resistance, making it ideal for use in high-stress applications. Overall, 4140 Chrome Moly Steel tubing is a high-quality, durable material that is widely used in a variety of applications that require high strength and toughness.

This grade of alloy also has the ability to be hardened and a high tensile strength, which is 655 Mpa. Most of the time, heat treatment is used to improve the mechanical properties of steel alloys. This alloy can be annealed in ways that are common. But because the alloy is tougher than most carbon steel alloys, it takes a lot more force to shape the UNS G41400 q&t Tube. Annealing is used on grade 4140 to get rid of any remaining cracks and make the material more flexible. Most of the time, an AISI 4140 Alloy Steel Seamless Tube Supplier will give you these parts after they have been quenched and tempered. Tempering makes the alloy harder and gives it more tensile strength. Quenching makes it harder. Because the alloy is both tough and hard, AISI 4140 qt Alloy steel Square Tubing tends to be more resistant to wear. So, it would be very hard for something outside the pipes to damage the surface. The alloy is also strong when it is turned. Materials often wear out over time, but the SAE 4140 qt Steel Round Tube has a high resistance to wear and tear.

4140 Tubing Specification

Dimensions ASTM, ASME and API
Supplier of 4140 Alloy Steel Tube
in Length
Within 13500 millimeter
Speciality in Large Diameter Size
Size 4 to 219 millimeter W. T.: 0.5 to 20 millimeter
Length In Single and Double Random & Cut to Length Suppliers
AISI 4140 Tube Type Welded / Seamless / Fabricated / ERW
Form Round, Square, Rectangular, Hydraulic.
End Plain End, Threaded, Beveled End

Chemical Composition of 4140 Steel Tubing

Standard Grade C Mn P S Si Ni Cr Mo
ASTM A29 4140 0.38-0.43 0.75-1.00 0.035 0.040 0.15-0.35 0.8-1.10 0.15-0.25
EN 10250 42CrMo4/
1.7224
0.38-0.45 0.6-0.9 0.035 0.035 0.4 0.9-1.2 0.15-0.30
JIS G4105 SCM440 0.38-0.43 0.60-0.85 0.03 0.03 0.15-0.35 0.9-1.2 0.15-0.30

4140 Chrome Moly Steel 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


Types Of Alloy Steel Seamless Tubes

Chrome Moly Steel Equivalent material Grade

Standard/ Grade UNS Temper Specification
AISI 4140 Alloy Steel UNS G41400 A, N, T AMS6381

AISI 4140 Pipe Grade Heat Treatment

Annealing 800 oC – 850 oC
Normalizing 870 oC – 900 oC
Tempering 550 oC – 700 oC

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.

4140 Chrome Moly Steel Mechanical Strength Requirements for in the Heat-Treated Condition for Turned

Mechanical Property Designation R S T U V
Limited Ruling Section 63 63 63 63 63
Tensile Strength Mpa Min 700 770 850 930 1000
Max 850 930 1000 1080 1150
0.20% Proof Stress Mpa Min 525 585 680 755 850
Elongation on 5.65√S0 % Min 12 11 9 9 9
Hardness Brinell HB Min 201 223 248 269 293
Max 255 277 302 331 352
*Material stocked generally in condition T
Check test certificate if critical for end use.

Preheat temperature for 4140 Dom Tubing

Section 25mm 40mm 50mm 75mm 150mm +
oC 370 400 425 455 510

4140 Tubing Applications & Uses

4140 alloy tubing has a wide range of applications due to its high strength and toughness properties. Some of the most common applications of 4140 alloy tubing include:

  • Oil and gas industry: 4140 alloy tubing is widely used in the oil and gas industry for the manufacture of drill collars, tool joints, and other high-stress components.
  • Machinery and equipment: 4140 alloy tubing is used in the manufacture of structural components and machinery parts, such as shafts, gears, and sprockets.
  • High-strength fasteners: 4140 alloy tubing is often used in the production of high-strength fasteners, such as bolts and screws, due to its high strength and toughness properties.
  • Automotive and motorsports: 4140 alloy tubing is commonly used in the automotive and motorsports industries for the manufacture of roll cages, suspension components, and other high-stress components.
  • Aerospace: 4140 alloy tubing is used in the aerospace industry for the manufacture of landing gear components, fuselage components, and other high-stress components.
  • Construction: 4140 alloy tubing is also used in the construction industry for the manufacture of high-strength structural components, such as support beams and columns.

We Supply 4140 Chrome Moly Steel Tubing in listed cities in India

Mumbai, Lucknow, Coimbatore, Imphal, Mysore, Ratlam, Delhi, Kanpur, Darjeeling, Jalandhar, Nagpur, Solapur, Kolkata, Allahabad, Dehradun, Jammu, Nashik, Srinagar, Chennai, Ahmedabad, Faridabad, Jamshedpur, Bhadravati, Chattisgarh, Durgapur, Asansol, Hospet, Bellary, Visakhapatnam, Nellore, Surat, Bangalore, Chandigarh, Ghaziabad, Jhansi, Patna, Siliguri, Hyderabad, Stainless Steel Pipe dealers in Salem, Amritsar, Noida, Kochi (Cochin), Mangalore, Indore, Vadodra, Bhubaneswar, Bikaner, Bhavnagar, Tirupur, Ankleshwar, Warangal, Agartala, Thoothukudi, Stainless Steel Pipe suppliers in Pune, Thiruvanthapuram, Jaipur, Aizawl, Guwahati, Kozhikode, Raipur, Vishakhapatnam, Jabalpur, Bhopal, Gwalior, Ludhiana, Rajahmundry, Thane, Agra, Bhubaneshwar, Gurgaon, Madurai, Rajkot, Varanasi, Bhilai, Haridwar, Meerut, Ranchi, Ahmednagar, Akola, Amravati, Aurangabad, Baramati, Beed, Bhandara, Bhiwandi, Buldhana, Chandrapur, Chimur, Dahanu, Dhule, Dindori, Erandol, Gadchiroli, Hatkanangle, Hingoli, Ichalkaranji, Jalgaon, Jalna, Karad, Khed, Yavatmal, Kolaba, Kolhapur, Kopargaon, Latur, Malegaon, Mumbai, Nagpur, Nanded, Nandurbar, Nashik, Osmanabad, Pandharpur, Parbhani, Rajapur, Ramtek, Ratnagiri, Raver, Sangli, Satara, Shirdi, Shirur, Solapur, Thane, Wardha, Washim, Andhra Pradesh, Jammu and Kashmir, Nagaland, Uttarakhand, Haryana, Lakshadweep, Arunachal Pradesh, Jharkhand, Odisha, West Bengal, Himachal Pradesh, Assam, Karnataka, Punjab, Andaman and Nicobar Islands, Puducherry, Bihar, Kerala, Rajasthan, Chandigarh, Meghalaya, Chhattisgarh, Madhya Pradesh, Sikkim, Dadar and Nagar Haveli, Mizoram, Goa, Maharashtra, Tamil Nadu, Daman and Diu, Tripura, Gujarat, Manipur, Telangana, Delhi, Uttar Pradesh in India.

We Export 4140 Chrome Moly Steel Tubing in listed Country

United States of America, Malaysia, UAE, Indonesia, Saudi Arabia, Iran, Qatar, India, China, United Kingdom, Singapore, Canada, Thailand, South Korea, Turkey, Philippines, Egypt, Germany, Italy, Japan, Russia, Vietnam, Australia, South Africa, Portugal, Morocco, Costa Rica, Kazakhstan, Netherlands, Mexico, Brazil, France, Spain, Taiwan, Nigeria, Bangladesh, Kuwait, Iraq, Ukraine, Poland, Jordan, Romania, Oman, Hong Kong, Venezuela, Colombia, Norway, Chile, Trinidad & Tobago, Greece, Czechia, Belgium, Sri Lanka, Cyprus, Angola, Myanmar (Burma), United Kingdom, Canada, South Korea, Thailand, Netherlands, Spain, Turkey, Australia, Mexico, Pakistan, Vietnam, Brazil, Philippines, France, Taiwan, Poland, South Africa, Russia, Nigeria, Kuwait, Czechia, Norway, Romania, Egypt, Oman, Sweden, Belgium, Hong Kong, Israel, Colombia, Switzerland, Denmark, Finland, Argentina, Venezuela, Peru, Ukraine, Chile, Bangladesh, Portugal, Ireland, Austria, Algeria, Greece, Iraq, New Zealand, Slovakia, Hungary, Kazakhstan, Slovenia, Lithuania, Serbia, Sri Lanka, Bahrain, Bulgaria, Morocco, Tunisia, Croatia, Jordan, Ecuador, Trinidad & Tobago, Estonia, Azerbaijan, Ghana, Lebanon, Cyprus, Dominican Republic, Latvia, Libya, Costa Rica, Cambodia, Macedonia (FYROM), Belarus, Jamaica, Palestine, Turkmenistan