SA179tubes.com specialises in high-quality products and services for the oil and gas industry. In order to provide excellent customer service and on-time order processing, we strive to be the best 4140 alloy steel tube supplier in the industry.
A wide range of downhole tools are made from low alloy steel 4140. Alloy steel with a carbon content of 0.38%-0.43% and controlled levels of chromium, molybdenum, manganese, silicon, phosphorus, and silicon.
In 4140 alloy tubing was more economical than stainless steel. 4140 Alloy Tubing is primarily composed of carbon, manganese, potassium, sulphur, silicon, chromium, and molybdenum. These tubes are suitable for medium to high corrosion-induced environments.
Alloy 4140 tubing is resistant to crevice corrosion and acid cracking. They can be easily machined and fabricated to form desired elements. The 4140 alloy tubing is highly ductile and can be easily galvanised or annealed. Cold-rolling or hot-rolling can easily be used to produce these tubes.
They can be ordered in lengths up to 13500 mm. 4140 Alloy Tubing has superior mechanical properties and strength. These Tubes have a minimum tensile strength of 655 Mpa and a minimum yield strength of 415 Mpa. All 4140 Alloy Tubing Suppliers follow the same standard processes and tests when producing the best products.
A variety of shapes and sizes are available in this grade of Tube. The 4140 alloy tubing is highly versatile and is commonly used for connecting rods, pump shafts, torsion bars, etc. Steel round Tubes are available in schedules SCH 5 to SCH 160 and SCH XXS. DIN 1.7218 Steel Round Tube exhibits exceptional tolerances and dimensional accuracy. The melting point of these Tubes is 1416 degrees C, and they have a density of 7.85 grams per cubic centimetre. As a 4140 Tube supplier, we offer exceptional prices on all of our products.
Low alloy steels are ideal for those applications that need to be economical while also being efficient. Cheaper than stainless steel, the small additions of different elements in their chemical composition give them significantly higher mechanical properties. Moreover, there is an increase in exceptional tolerances and dimensional accuracy. 4140 is a type of low steel alloy whose chemical composition includes chromium, molybdenum, and manganese.
Manganese in the chemistry of AISI 4140 Tube improves its toughness, while chromium and molybdenum impart ductility. In addition to its hardenability, this alloy grade has a high tensile strength of 655 MPa. Heat treatment is usually used to improve the mechanical properties of steel alloys. This alloy can be annealed using conventional methods.
However, because the alloy is tougher than most carbon steel alloys, it requires greater force to form UNS G41400 q & t Tubes. Grade 4140 is annealed to reduce residual dresses, while also improving their ductility. Suppliers of AISI 4140 Alloy Steel Seamless Tube typically supply these components quenched and tempered.
As tempering increases the alloy’s hardness and tensile strength, quenching increases its hardness. Due to the alloy’s high toughness and hardness, AISI 4140 qt Alloy steel Square Tubing material tends to resist abrasion better. Therefore, external forces would have a hard time damaging the Tubes’ surface. Torsion strength is also high in the alloy. The SAE 4140 qt Steel Round Tube exhibits high fatigue resistance, which is common for materials.
AISI 4140 Tube Standard | AISI 4140, ASTM A519 (with IBR Test Certificate) |
AISI 4140 Tube Size | 1/2” NB to 36” NB |
AISI 4140 tube Thickness | 3-12mm |
AISI 4140 Tube Schedules | SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules |
AISI 4140 Tube Origin | European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material) |
AISI 4140 Tube Tolerance | Cold drawn Tube +/-0.1mm Cold rolled Tube: +/-0.05mm |
Craft | Cold rolled and Cold drawn |
AISI 4140 Tube Type | Seamless / ERW / Welded / Fabricated |
AISI 4140 tube available in Form of | Round, Square, Rectangular, Hydraulic Etc. |
AISI 4140 TubeLength | Standard Double & In Cut length also. |
AISI 4140 Tube End | Plain End, Bevelled End, Treaded |
Specialised in | Large Diameter AISI 4140 Tube |
Additional Testing | NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc. |
Application | Seamless Ferritic Alloy-Steel Tube for High-Temperature Service |
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 |
Sulphur, S | 0.040 |
Phosphorous, P | 0.035 |
Properties | Metric | Imperial |
Density | 7.85 g/cm3 | 0.284 lb/in³ |
Melting point | 1416°C | 2580°F |
Tensile Properties | ||||||||
Grade Designation | Condition | Ultimate Strength | Yield Strength | Elongation in 2 in.or 50mm,% | Rockwell,Hardness B Scale | |||
ksi | Mpa | ksi | Mpa | |||||
4140 | HR | 90 | 621 | 70 | 483 | 20 | 89 | |
SR | 105 | 724 | 85 | 586 | 10 | 95 | ||
A | 75 | 517 | 55 | 379 | 30 | 81 | ||
N | 90 | 621 | 60 | 414 | 20 | 89 |
GB/T 3077 | JIS | AISI/SAE | DIN | BS | ISO |
20Mn2-50Mn2 | SMn420-SMn443 | 1320-1345 | 20Mn5-50Mn7 | 150M19-160M36 | 22Mn6-42Mn6 |
15Cr-50Cr | SCr415-445 | 5115-5150 | – | 527A17 | 20Cr4-41Cr4 |
15CrMo | SCM415 | – | 15CrMo5 | 1653 | – |
35CrMo | SCM435 | 4137 | 34CrMo1 | – | – |
30CrMo | SCM420 | 4140 | 25CrMo4 | 25CrMo4 | |
30CrMoA | SCM430 | 4140 | 34CrMo4 | 34CrMo4 | |
42CrMo | SCM440 | 4140 | 42CrMo4 | 708M40 | |
– | – | F11-91 | – | – | – |
38CrMoAl | SACM645 | – | – | – | 41CrAlMo74 |
50CrV | – | 6150 | 51CrV4 | – | – |
15-20CrMn | SMnC420 | 5115-5120 | 16MnCr5 | 16MnCr5 | |
GCr15 | – | SAE52100 | 100Cr6 | – | – |
GCr15SiMn | – | – | 100CrMnSi6-4 | – | – |
20CrMnMo(H) | SCM421(H) | 4119 | – | – | – |
40CrMnMo | SCM440 | 4142 | 42CrMo4 | 708A42 | 42CrMo4 |
20-50CrNi | SNC436 | 3115-3150 | 40NiCr6 | 640M40 | – |
12CrNi2 | SNC415 | 3415 | 14NiCr10 | – | – |
20CrNiMo | SNCM220 | 8620 | 21NiCrMo2 | 805M20 | 20NiCrMo2 |
34CrNiMo | – | – | 34CrNiMo6 | – | – |
34CrNi1Mo | – | – | 34CrNi1Mo6 | – | – |
40CrNiMo | SNCM439 | 4340 | 36CrNiMo4 | 816M40 | – |
Size | MSL Make | ISMT make | JSL Make |
1/2″ | 4,264.71 | 4,257.35 | 4,272.06 |
3/4″ | 4,044.12 | 4,036.76 | 4,051.47 |
1″ | 3,897.06 | 3,889.71 | 3,904.41 |
1.25″ | 3,852.94 | 3,845.59 | 3,860.29 |
1.5″ | 3,750.00 | 3,742.65 | 3,757.35 |
ASTM A519 grade 4130 mechanical properties is that it has a Tensile Strength of 785. The Yield strength of A519 grade 4130 is 930. A519 grade 4130 has an Elongation of 12. The RB of ASTM A519 grade 4130 is 229. ASTM A519 grade 4130 has a Melting Point of 2610 °F (1432 °C). The Density of A519 grade 4130 is 0.284 lb/in³ (7.85 g/cm3). ASTM A519 Chemical Composition Is Fe 97.03 – 98.22, Chromium, Cr 0.80 – 1.10, Silicon, Si 0.15 – 0.30, Sulfur, S 0.040, Carbon, C 0.280 – 0.330, Molybdenum, Mo 0.15 – 0.25, Phosphorous, P 0.035 and Manganese, Mn 0.40 – 0.60.
OD | Wall Thickness | Length | |
Cold Drawn | 3/4 to 15 Inch | 1/8 to 1 1/2 Inch | 12000 mm max |
Hot Rolled | 2 to 30 Inch | 1/8 to 8 Inch | 12000 mm max |
Properties | Metric | Imperial |
Tensile strength | 490 MPa | 71100 psi |
ASTM A519 Yield strength | 415 MPa | 60200 psi |
Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
Shear modulus (typical for steel) | 80.0 GPa | 11600 ksi |
Hardness, Brinell | 143 | 143 |
Hardness, Knoop (converted from Brinell hardness) | 163 | 163 |
Hardness, Rockwell B (converted from Brinell hardness) | 78 | 78 |
Hardness, Vickers (converted from Brinell hardness) | 149 | 149 |
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) | 15.00% | 15.00% |
Reduction of area | 40.00% | 40.00% |
Machinability (based on AISI 1212 steel as 100 machinability. The machinability of Group I bar, rod, and wire products can be improved by cold drawing.) | 75 | 75 |
AISI 4140 alloy steel has good machinability in the annealed condition.
4140 Alloy Tubing has high ductility. It can be formed using conventional techniques in the annealed condition. It requires more pressure or force for forming because it is tougher than plain carbon steels.
4140 Alloy Tubing can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.
4140 Alloy Tubing is heated at 845°C (1550°F) followed by quenching in oil. Before hardening, it can be normalised by heating at 913°C (1675°F) for a long period of time followed by air cooling.
AISI 4140 alloy steel is forged at 926 to 1205°C (1700 to 2200°F)
AISI 4140 alloy steel can be hot worked at 816 to 1038°C (1500 to 1900°F)
AISI 4140 alloy steel can be cold worked using conventional methods in the annealed condition.
AISI 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.
AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has a lower tempering temperature. For example, tensile strength of 225 ksi can be achieved by tempering at 316°C (600°F), and a tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).
AISI 4140 alloy steel can be hardened by cold working, or heating and quenching.
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