4130/4140 Steel Alloy (ST4130/ST4140) Tubing

AISI/SAE(*) 4140 and 4130 are low steel alloys have the same elemental composition, with common elements being carbon, molybdenum, chromium. They are popular steel materials due to properties such as toughness, high fatigue strength, and strength. Both steel variants do not have anti-rust properties. To make them stronger they need to be subjected to heat treatment such as annealing, cold working, etc. A summary of the mechanical properties can be seen below:

Tensile Strength (psi): ST4130 97000 - ST4140 148000

Yield Strength (psi): ST4130 63000 - ST4140 95000

Elongation (2"): ST4130 25.5% - ST4140 17.7%

Brinell Hardness:  ST4130 197 - ST4140 302

In terms of weldability and machinability, 4130  is a preferred choice because it has a lower carbon content than 4140. 

Steel alloy 4130 (ST4130), also known as Chromoly or Chrome Moly after the 2 key elements of its composition, chromium, and molybdenum, is a general-purpose alloy steel widely used by the aviation and motorsports industries due to its weldability, fabrication, and mild hardenability in all offered forms (tubes, bars, sheets and plates). 

Steel alloy 4140 (ST4140) is harder than normal steel remaining unbroken in heavy loading conditions. It is susceptible to rust although it is highly resistant to corrosion. 4140 steel also has good machinability but it has to be subjected to heat treatment. Often used for gears, crankshafts and other parts.

They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled. The Normalized condition (sometimes referred to as "Condition N") is the harder and stronger condition and is best used when forming is not needed. Normalizing relieves internal stress on steel and improves toughness in steels that may harden after the cold working process. The Annealed condition (sometimes referred to as "Condition A") is the softer and formable condition and is best used when forming is needed. Annealing relieves internal stresses, softens and makes the material more ductile.

4130/4140 steel tubes are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. 4130 alloy steel (Chrome Moly) have been for years the standard of the aircraft industry. These tubes offer good strength and weldability without compromising steel abrasion or impact resistance and can also be made even stronger through heat treatment. They are commonly used in in structural applications, gears, fasteners, and welding applications. Available in a range of outer diameters, wall thicknesses and pre cut lengths in inches or cut to order lengths from 1 foot to 12 feet. Depending on the supplier, they comply with different standards/specifications, such as MIL-T6736 standard or ASTM/A S1906 specifications. 

(*) American Iron & Steel Institute (AISI), Society of Automotive Engineers (SAE)

4130/4140 Steel Alloy (ST4130/ST4140) Tubing

There are 6 products.

Showing 1-6 of 6 item(s)

Active filters

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), also known as Chrome Moly after the 2 key elements of its composition, chromium, and molybdenum, is a general-purpose alloy steel widely used by the aviation and motorsports industries due to its weldability, fabrication, and mild hardenability in all offered forms (tubes, bars, sheets and plates). They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.

The Normalized condition (sometimes referred to as "Condition N") is the harder and stronger condition and is best used when forming is not needed. Normalizing relieves internal stress on steel and improves toughness in steels that may harden after the cold working process. The Annealed condition (sometimes referred to as "Condition A") is the softer and formable condition and is best used when forming is needed. Annealing relieves internal stresses, softens and makes the material more ductile.

4130 alloy steel (Chrome Moly) seamless round tubes are offered in Normalized (N Condition) as part of our own branded (AVIATIONEU NEW ERA) product lines. They have been for years the standard of the aircraft industry. These tubes offer good strength and weldability without compromising steel abrasion or impact resistance and can also be made even stronger through heat treatment. They are commonly used in in structural applications, gears, fasteners, and aircraft exteriors. Tensile Strength: 90,000 PSI. Available in a range of outer diameters, wall thicknesses and pre cut lengths in inches. Also available in cut to order lengths from 1 foot to 12 feet (see separate product presentation). Depending on the supplier, they comply with different standards/specifications, such as MIL-T6736 standard or ASTM/A S1906 specifications. Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation or contact us.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), also known as Chrome Moly after the 2 key elements of its composition, chromium, and molybdenum, is a general-purpose alloy steel widely used by the aviation and motorsports industries due to its tensile strength of 90,000 psi, weldability, fabrication, and mild hardenability in all offered forms (tubes, bars, sheets and plates). They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.

The Normalized condition (sometimes referred to as "Condition N") is the harder and stronger condition and is best used when forming is not needed. Normalizing relieves internal stress on steel and improves toughness in steels that may harden after the cold working process. The Annealed condition (sometimes referred to as "Condition A") is the softer and formable condition and is best used when forming is needed. Annealing relieves internal stresses, softens and makes the material more ductile.

4130 alloy steel (Chromoly) tubes exhibit an excellent strength to weight ratio, they are malleable, very easy to weld, resistant to scaling and oxidation and have a clean, smooth finish on both the inside and the outside of the tubing. Square tubes are offered in Normalized (N) condition as part of our own branded (AVIATIONEU NEW ERA) product lines and conform to SAE AMS-T 6736 & AMS 6360 M(*) specifications. They can be furnished in different wall thicknesses, widths and heights in inches and in different pre cut lengths from 1 foot to 12 feet. Appearing selling prices are per foot of cut length. Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation or contact us.

(*) Aerospace Material Specifications (AMS) established by the Society of Automotive Engineers (SAE).

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), also known as Chrome Moly after the 2 key elements of its composition, chromium, and molybdenum, is a general-purpose alloy steel widely used by the aviation and motorsports industries due to its weldability, fabrication, and mild hardenability in all offered forms (tubes, bars, sheets and plates). They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.

The Normalized condition (sometimes referred to as "Condition N") is the harder and stronger condition and is best used when forming is not needed. Normalizing relieves internal stress on steel and improves toughness in steels that may harden after the cold working process. The Annealed condition (sometimes referred to as "Condition A") is the softer and formable condition and is best used when forming is needed. Annealing relieves internal stresses, softens and makes the material more ductile.

4130 alloy steel (Chrome Moly) seamless round tubes are offered in Normalized (N Condition) as part of our own branded (AVIATIONEU NEW ERA) product lines. They have been for years the standard of the aircraft industry. These tubes offer good strength and weldability without compromising steel abrasion or impact resistance and can also be made even stronger through heat treatment. They are commonly used in in structural applications, gears, fasteners, and aircraft exteriors. Tensile Strength: 90,000 PSI. 

Available in different outer diameters, wall thicknesses in inches and cut to order lengths from 1 foot to 12 feet in increments of 1 foot with 1/8" cut tolerance. Appearing price is per foot. They meet ASTM/A S1906 specifications. Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation or contact us for price on any unlisted size.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), also known as Chrome Moly is a general-purpose alloy steel widely used by the aviation and motorsports industries due to its tensile strength, weldability, fabrication, and  hardenability. Sourced from quality producers AVIATIONEU NEW ERA 4130 Alloy Steel welded round tubes are cold drawn, offered in Normalized (N) condition and can be used in mechanical engineering, automotive applications and machinery. They conform to ASTM A513 specifications and they are offered in different wall thicknesses (1-12.5 mm), outer diameters (OD  6-350 mm) and cut to order lengths (max12000 mm/12 m), in various heat treatment processes (no final thermal treatment, stress relieved, annealed or normalized). Unit of sale is 1 Ton (US or Metric as specified) with Minimum Order Quantity (MOQ) 3 Tons. Sea/sea-surface transport to customer destination can be provided. Approximate time for shipping: usually 1-2 months from the time of order payment depending on the ordered quantity. Appearing price is indicative per unit of sale. Mechanical properties, depending on the selected heat treatment process, are summarized below. For additional information please refer to the attached chart or contact us.

Yield Strength: 55 ksi/ 379 Mpa - 50 ksi/ 345 Mpa - 85 ksi/ 586 Mpa - 80 ksi/ 552 Mpa

Ultimate Strength: 72 ksi/ 496 Mpa - 70 ksi/ 483 Mpa - 95 ksi/ 655 Mpa - 90 ksi/ 621 Mpa

Enlongation (%): 10% - 20% - 5% - 10%

Rockwell Hardness B Scale: 80 - 100 - 90- 87

AVIATIONEU NEW ERA Carbon...

Steel seamless round tubes and pipes are offered as part of AVIATIONEU NEW ERA product lines and produced from carbon steel and steel alloy grades 4118, 4130,4135,4137 and 4140 with cold-rolled or hot rolled forming methods depending on the producer and the tube diameters. Cold-rolled seamless steel tubes/pipes come often in smaller diameters, higher accurancy in dimensions but also higher price than hot-rolled tubing. Depending on the selected tubing, they can be used in a range of aerospace and industrial applications (petroleum, chemical, etc.). These tubes/pipes can be furnished in different thermal treatment conditions and delivery options including A-Annealed, N-Normalized, QT-Quenched and Tempered, SR-Stress relieved or Finish Anneal. Sourced from quality producers, they conform to ASTM A519 specifications and offered in different wall thicknesses (up to 80 mm), outer diameters (up to 760 mm) and pre cut or cut to order lengths (usually in pre cut 5.8m, 6m, 11.8m, max 12m or other cut to order lengths as required). Unit of sale is 1 Ton (US or Metric as specified) with Minimum Order Quantity (MOQ) 3 Tons. Sea/sea-surface transport to customer destination can be provided. Approximate time for shipping: usually 1-2 months from the time of order payment depending on the ordered quantity. Sold per unit of sale and copetitively priced, they consist a cost effective solution when large quantities are demanded. Appearing price per unit of sale is for reference only as it depends on the selected tubing. For additional information please refer to the attached documentation or contact us for a quotation.

AVIATIONEU NEW ERA...

Seamless 4130/4140 alloy steel tubes/pipes are offered as part of AVIATIONEU NEW ERA product lines in rectangular or square shapes. Produced as cold drawn & cold rolling the tubes are intended for use in structural applications. These tubes can be delivered in different options (A.W.H.R. "as welded" from hot-rolled steel, A.W.C.R. "as welded" from cold-rolled steel, S.D.C.R.  "sink-drawn", cold-rolled steel, M.D. mandrel drawn or S.S.I.D. special smooth inside diameter). Sourced from quality producers, they conform to ASTM A519 specifications and can be furnished in the following ranges of wall thicknesses, outer dimensions and cut to order lengths:

Square Tubes  

Outer Dimesion (O.D.): 20-20 to 500-500 mm,

Wall Thickness  (W.T.): 1-24 mm,

Cut Length (L): Cut To Order - max12000 mm (12 m).

Rectangle Tubes 

Outer Dimesion (O.D.): 20-30 to 400-600 mm,

Wall Thickness  (W.T.): 1-24 mm,

Cut Length (L): Cut To Order - max12000 mm (12 m).

Unit of sale is 1 Ton (US or Metric as specified) with Minimum Order Quantity (MOQ) 3 Tons. Sea/sea-surface transport to customer destination can be provided. Approximate time for shipping: usually 1-2 months from the time of order payment depending on the ordered quantity. Appearing price is indicative per unit of sale. For additional information please refer to the attached chart or contact us.