this is why its often called chromoly or cromo. Chromoly has an excellent strength to weight ratio, is easily welded and are considerably stronger and harder than standard 1020 mild seamed and DOM tube steels.
The numbers 4130 defines the chemical composition of the steel.
- 41 means a low alloy steel containing 1 % chromium and 0.2 % molybdenum.
- 30 means a carbon content of 0.30%.
In addition there will be around 0.2-0.5 % silicon, 0.5-1.0 % manganese, and under 0.1 % of each of a dozen or so other elements whose presence is unavoidable.
The remaining 97-98 % is iron.
4130 chromoly tubing began its first use in the aircraft industry. Race chassis builders began using the tubing for its strength to weight ratio.
4130 tubing is used for anything from bicycle frames, AK-47 receivers, tubular chasis, suspension parts, aircraft parts and air frames etc… Ive used cromo for suspension components, cages / tube chassis and machined parts.
The remaining 97-98 % is iron.
4130 chromoly tubing began its first use in the aircraft industry. Race chassis builders began using the tubing for its strength to weight ratio.
4130 tubing is used for anything from bicycle frames, AK-47 receivers, tubular chasis, suspension parts, aircraft parts and air frames etc… Ive used cromo for suspension components, cages / tube chassis and machined parts.
AISI 4130 is a Standard grade Alloy Steel. It is commonly called AISI 4130 Chromium-molybdenum steel. It is composed of (in weight percentage) 0.28-0.33% Carbon (C), 0.40-0.60% Manganese (Mn), 0.035%(max) Phosphorus (P), 0.04%(max) Sulfur (S), 0.15-0.30% Silicon (Si), 0.80-1.10% Chromium (Cr), 0.15-0.25% Molybdenum (Mo), and the base metal Iron (Fe). Other designations of AISI 4130 alloy steel include UNS G41300 and AISI 4130.
Steel is the common name for a large family of iron alloys. Steels can either be cast directly to shape, or into ingots which are reheated and hot worked into a wrought shape by forging, extrusion, rolling, or other processes. Wrought steels are the most common engineering material used, and come in a variety of forms with different finishes and properties. Alloy steels are steels that exceed the element limits for Carbon steels. However, steels containing more than 3.99% chromium are classified differently as stainless and tool steels. Alloy steels also includes steels that contain elements not found in carbon steels such as nickel, chromium (up to 3.99%), cobalt, etc.
The typical elastic modulus of alloy steels at room temperature (25°C) ranges from 190 to 210 GPa. The typical density of alloy steels is about 7.85 g/cm3. The typical tensile strength varies between 758 and 1882 MPa. The wide range of ultimate tensile strength is largely due to different heat treatment conditions.
AISI 4130 steel is a low alloy steel that is used in structural designs that may be found in applications such as aircraft engine mounts or welded tubing. It is well known for its ease of welding and ability to harden in commercial applications. It is commonly referred to as chromium-molybdenum steel.
Composition Specifications
AISI 4130 steel is comprised of seven different elements. The weight of each of these elements is measured as a percentage and must stay within the designated range to meet steel standards. The composition must be between 0.28 and 0.33 percent carbon and 0.4 to 0.6 percent manganese. The amount of phosphorous and sulfur must be less than 0.035 and 0.04 percent respectively. The amount of silicon must range between 0.15 and 0.30 percent. Chromium ranges between 0.8 and 1.10 percent while molybdenum must measure between 0.15 and 0.25 percent.
AISI 4130 steel is comprised of seven different elements. The weight of each of these elements is measured as a percentage and must stay within the designated range to meet steel standards. The composition must be between 0.28 and 0.33 percent carbon and 0.4 to 0.6 percent manganese. The amount of phosphorous and sulfur must be less than 0.035 and 0.04 percent respectively. The amount of silicon must range between 0.15 and 0.30 percent. Chromium ranges between 0.8 and 1.10 percent while molybdenum must measure between 0.15 and 0.25 percent.
Mechanical Specifications
The mechanical specifications of AISI 4130 steel are standard at 25 degrees Celsius. The density of the material must be between 7700 and 8030 kg per cubic meter while the Poisson ratio must be between 0.27 and 0.30. The elastic modulus ranges between 190 and 210 while the tensile strength and yield strength are 560.5 and 360.6 respectively. Elongation is 28.2 percent and the reduction in area is 55.6 percent. Hardness is rated at 156 and the impact strength is 61.7.
The mechanical specifications of AISI 4130 steel are standard at 25 degrees Celsius. The density of the material must be between 7700 and 8030 kg per cubic meter while the Poisson ratio must be between 0.27 and 0.30. The elastic modulus ranges between 190 and 210 while the tensile strength and yield strength are 560.5 and 360.6 respectively. Elongation is 28.2 percent and the reduction in area is 55.6 percent. Hardness is rated at 156 and the impact strength is 61.7.
Thermal and Electric Specifications
AISI 4130 is a thermal conductor capable of a rating of 42.7 measured at 100 degrees Celsius. The specific heat it can handle is 477 at 50 to 100 degrees Celsius. The electric resistivity has been measured at 223 when tested at 20 degrees Celsius.
AISI 4130 is a thermal conductor capable of a rating of 42.7 measured at 100 degrees Celsius. The specific heat it can handle is 477 at 50 to 100 degrees Celsius. The electric resistivity has been measured at 223 when tested at 20 degrees Celsius.
Heating Specifications
AISI 4130 can be heated as a way to harden the material. When hardening is desired, the material should be heated at a minimum of 1600 degrees F. followed by an oil quench. The best results can be obtained when heating occurs between 1650 and 1700 degrees, followed by an oil quench and soak of 1600 degrees. If the material loses too much ductility during this process, the material can be tempered to restore some of the function. Tempering should be conducted at temperatures between 750 and 1050 degrees, depending on the resultant strength desired. The lower temperatures generally result in greater strengths during the tempering process. Heating can also be used to make the material easier to work with. Manipulation heating can be best conducted in a range of 2000 to 1500 degrees.
AISI 4130 can be heated as a way to harden the material. When hardening is desired, the material should be heated at a minimum of 1600 degrees F. followed by an oil quench. The best results can be obtained when heating occurs between 1650 and 1700 degrees, followed by an oil quench and soak of 1600 degrees. If the material loses too much ductility during this process, the material can be tempered to restore some of the function. Tempering should be conducted at temperatures between 750 and 1050 degrees, depending on the resultant strength desired. The lower temperatures generally result in greater strengths during the tempering process. Heating can also be used to make the material easier to work with. Manipulation heating can be best conducted in a range of 2000 to 1500 degrees.
Chemistry Data :
Carbon
|
0.28 – 0.33
|
Chromium
|
0.8 – 1.1
|
Manganese
|
0.7 – 0.9
|
Molybdenum
|
0.15 – 0.25
|
Phosphorus
|
0.035 max
|
Silicon
|
0.15 – 0.35
|
Sulphur
|
0.04 max
|
TYPICAL ANALYSIS
C.
|
Si.
|
Mn.
|
Cr.
|
Mo.
|
0.32%
|
0.25%
|
0.50%
|
1.00%
|
0.22%
|
Tensile Properties
| Grade Designation | Condition | Ultimate Strength | Yield Strength | Elongation in 2 in.or 50mm,% | Rockwell,Hardness B Scale | ||
| ksi | Mpa | ksi | Mpa | ||||
| 4130 | 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 | |
| Data | Conditions | ||
| T (°C) | Treatment | ||
| Thermal Conductivity (w/m-k) | 42. 7 | 100 | |
| Specific Heat (j/kg-k) | 477 | 50 | |
4130 Electric properties
Electric Properties:
The range of HDPE pipes is manufactured by using high grade HDPE granules. Having excellent anti-corrosive properties, our range of HDPE pipes is used in agricultural and other applications. These pipes are inert to the effects of chemicals and soil.
Electric Properties:
The range of HDPE pipes is manufactured by using high grade HDPE granules. Having excellent anti-corrosive properties, our range of HDPE pipes is used in agricultural and other applications. These pipes are inert to the effects of chemicals and soil.
| Properties | Conditions | ||
| T(°C) | Treatment | ||
| Electric Resistivity(10-9/-m) | 223 | 20 | |
4130 Heat Treatment Properties
We have firmly positioned ourselves as one of the leading traders, wholesalers and suppliers of pipes and pipes fitting. The offered products are manufactured using supreme quality metal with robust construction at the vendor end. This range of bsp threaded fitting refer to a uk standard of pipe fitting, which is known as british standard pipe taper thread and is widely used in various industrial applications to ensure maximum effective output. In addition, the offered product prevents leakage, maintains smooth flow of liquid and withstands with high pressure.
We have firmly positioned ourselves as one of the leading traders, wholesalers and suppliers of pipes and pipes fitting. The offered products are manufactured using supreme quality metal with robust construction at the vendor end. This range of bsp threaded fitting refer to a uk standard of pipe fitting, which is known as british standard pipe taper thread and is widely used in various industrial applications to ensure maximum effective output. In addition, the offered product prevents leakage, maintains smooth flow of liquid and withstands with high pressure.
Aisi 4130 properties
Reliable Pipes & Tubes Limited is one of the leading manufacturer & stockist of ASTM A519 4130 Seamless Pipes & 4130 Fittings. Reliable is one of the largest stockist & distributor of AISI & SAE 4130 fittings. Seamless Pipe is tubing made to the pipe schedule. Alloy pipe in the power industry generally refers to A335 material, but in the oil and gas market, 4130 pipe is used. This product is made to the pipe schedule but uses A519-4130 as the controlling seamless specification. The material is then heat treated to L80, P110 or the customer’s specified properties. This material is easily welded and is generally used for above ground applications and utilizes the fittings, flanges and other piping components with the same 4130 chemistry.
(SAE 4130/4140) (AISI 4130/4140) (ASTM A519 4130/4140) (4130/4140) EQUIVALENT
| GB | JIS | ASTM | 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 | – |
| 20crmo | scm420 | 4120 | |||
| 35crmo | scm435 | 4137 | 34crmo1 | – | – |
| 30crmo | scm420 | 4130 | 25crmo4 | 25crmo4 | |
| 30crmoa | scm430 | 4130 | 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 | – | – |
| Principal Design Features | AISI 4130 is a low alloy steel containing molybdenum and chromium as strengthening agents. The carbon content is nominally 0.30% and with this relatively low carbon content the alloy is excellent from the fusion weldability standpoint. The alloy can be hardened by heat treatment. | |
| Applications | Typical applications for 4130 low alloy steel include. structural use such as aircraft engine mounts and welded tubing applications. | |
| Machinability | This alloy is readily machined by conventional methods. Machinability is best with the alloy in the normalized and tempered condition. Although the alloy may be machined in the fully heat treated condition, machinability becomes more difficult with increasing strength (hardness) of the alloy. | |
| Forming | Formability is best in the Annealed condition for which the ductility is very good, Bend radii of 1t on Annealed sheet material may be made. | |
| Welding | 4130 alloy is noted for its weldability by all of the commercial methods. | |
| Heat Treatment | Heating at 1600 F followed by an oil quench will harden the 4130 alloy. For best results a normalizing pre-hardening heat treatment may be used at 1650 to 1700 F followed by the 1600 F soak and oil quench. | |
| Forging | Forge at 2200 F maximum down to 1750 F. | |
| Hot Working | 4130 in the Annealed condition has excellent ductility. Thus it is usually not necessary to do hot working to form parts. If hot working is needed it can be done in the range of 2000 F to 1500 F. | |
| Cold Working | Cold working by conventional methods is readily accomplished on this alloy. | |
| Annealing | 4130 (and most of the other low alloy steels) may be Annealed at 1550 F for a time long enough to allow thorough heating of the section size. It should then be cooled in the furnace at a rate of less than 50 F per hour down to 900 F, followed by air cooling from 900 F. | |
| Aging | Not applicable to this alloy. | |
| Tempering | Tempering is done to restore some of the ductility that may be lost after the hardening heat treatment and quench. Alloy 4130 is tempered at between 750 F and 1050 F, depending upon the strength level desired. The lower the tempering temperature the greater the strength. | |
| Hardening | Hardening is accomplished by heat treatment or by cold working — see “Heat Treatment”. | |
| Other Comments | The 4130 alloy is a through hardening alloy and should not be case hardened. |
Application Of 4130 & 4140 Pipe & Pipe Fittings
Uses of 4130 Alloy
- This alloy is used for manufacturing ball and roller bearings.
- This alloy is also good for manufacturing gears due to their heat treatment property.
- It is used for rock-crushing machinery and automotive parts.
- It is used for manufacturing structural parts of aircraft.
- The main use of this alloy is in the field of resistance welding.
- It is used for cutter tools such as drills, taps, milling cutters, etc.
Summary
4130 steel alloy is famous for its strength property when it is used for heat treatment. The importance of this steel is in aircraft manufacturing companies and welding purpose. It has features of both chromium and molybdenum steel alloys.
4130 steel alloy is famous for its strength property when it is used for heat treatment. The importance of this steel is in aircraft manufacturing companies and welding purpose. It has features of both chromium and molybdenum steel alloys.
- Perforating guns
- Sand screens
- Downhole drill motors
The steels used for these applications guarantee high resistance to yield strength and tight dimensional tolerances.
| Application | Tubes For Oil & Gas Tools | |
| Manufacturing Process | Hot-rolled or cold-drawn | |
| Steel Grades | 4130 and 4140 | |
| Size Range | Outer Diameter | 51–508 mm |
| Wall Thickness | 5–50 mm | |
| Mechanical Properties | 80, 110 and 125 ksi minimum yield strength (corresponding to l80, p110 and q125 from api 5ct) | |
| Delivery Conditions | as rolled, normalized, Annealed, quenched and tempered | |
| Standards | compliant with astm a519 and some requirements of api 5ct (equivalent to iso 11960:2004) | |
- Ultra-high strength product
- Ductility, fracture toughness, fatigue and impact strength
- Resistance to crack propagation
- Cleanliness and reliability
- Composes structural aircraft parts, i. E. Landing gear components
- Capable of meeting heavy duty requirements
Aircraft quality 4130 steel is a medium carbon, low alloy steel containing 0. 15/0. 25% molybdenum and 0. 80/1. 10% chromium as strengthening agents. With a relatively low carbon content of 0. 28/0. 33%, it offers exceptional weldability. With the proper heat treatment it is also readily machined. Annealing 4130 steel offers excellent ductility. It can also be normalized or otherwise heat treated.
4130 steel alloy is used primarily in the construction of commercial and military aircraft and ground support systems as well as automotive, race cars, off road, hydraulic tools, and machine tool applications. It is an intermediate strength material. Lighter gauges offer lighter weight but still maintain great strength, making it excellent for auto racing and aerospace. Engineers also use 4130 steel for parts such as pins used to secure a critical assembly. These pins are designed to fail at a specific yield in order to avoid a catastrophic failure, and 4130 steel stands up to this test.
4130 steel alloy is used primarily in the construction of commercial and military aircraft and ground support systems as well as automotive, race cars, off road, hydraulic tools, and machine tool applications. It is an intermediate strength material. Lighter gauges offer lighter weight but still maintain great strength, making it excellent for auto racing and aerospace. Engineers also use 4130 steel for parts such as pins used to secure a critical assembly. These pins are designed to fail at a specific yield in order to avoid a catastrophic failure, and 4130 steel stands up to this test.
