Steel Alloy Tubing

Low-alloy Steels

Steels can be classified in a variety of different ways depending on their composition (carbon, low-alloy or stainless steel), manufacturing methods, finishing method (such as hot rolling or cold rolling), product form (bar,sheet, tube, etc), heat treatment (such as annealing, quenching and tempering), required strength level  as specified in ASTM standards) and others. Because of the wide variety of chemical compositions possible and the fact that some steels are used in more than one heat-treated, condition, some overlap exists among the alloy steel classifications. 

There are different alloy steel grades derived from the different compositions of alloys (i.e the % weight of alloying materials used) but basically alloy steels are divided into two subgroups (high and  low alloy steels) as a result of higher or lower participations of alloying materials in their chemical composition. Low-alloy steels constitute a category of ferrous materials that exhibit mechanical properties superior to plain carbon steels as the result of additions of alloying elements such as nickel, chromium, and molybdenum. Total alloy content can range from 2.07% up to levels just below that of stainless steels, which contain a minimum of 10% Cr. For many low-alloy steels, the primary function of the alloying elements is to increase hardenability in order to optimize mechanical properties and toughness after heat treatment. In some cases, however, alloy additions are used to reduce environmental degradation under certain specified service conditions. 

Different low-alloy steel grades include: SAE AISI(*) 4130 (G41300**), 4140 (G41400**), 4330 (G43300**) and 4340 (G43400**).

As with other steels, low-alloy steels can be classified according to:

- Chemical composition, such as nickel steels, nickel-chromium steels, molybdenum steels, chromium-molybdenum steels

- Heat treatment, such as quenched and tempered, normalized and tempered, annealed.

Alloy steel applications range over a variety of industrial, domestic and commercial uses, from household and kitchen accessories to larger industrial machine parts.

AISI 4130/4140 Low-alloy Steels

SAE AISI 4130 and 4140 low-alloy steels 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 grades do not have anti-rust properties. To make them stronger they need to be subjected to heat treatment such as annealing, cold working, etc. 

AISI 4130, 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). 4130 alloy steel (Chrome Moly) have been for years the standard of the aircraft industry. 

AISI 4140 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.

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

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.

AISI 4130/4140 tubes are offered as part of our own branded (AVIATIONEU NEW ERA) product lines in both seamless and welded types to meet the requirements of project specifications and the conditions for which the tubing will ultimately be used.

For additional information please refer to the individual product presentations.

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

(**)  Unified Numbering System ( UNS) Number. UNS is an alloy designation system for Metals & Alloys providing a means of correlating many internationally used metal and alloy numbering systems administered by their producers, societies, trade associations, and individual users.

AVIATIONEU NEW ERA Carbon Steel Composition-Properties

Steel Alloy Tubing

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 )  or Annealed (A) conditions 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 in millimeters (mm) and pre-cut lengths of one meter or multiples or cut to order (CTO) lengths in centimeters (cm). Depending on the supplier, they comply with different standards/specifications, such as ASTM A 519 or AMS MIL-T6737. 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 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 )  or Annealed (A) conditions 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 or cut to order (CTO) lengths of 12 inches (1 foot)) or multiples. Apperating price of CTO tubes is per foot (12 inches). 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...

AVIATIONEU NEW ERA Chrome Moly 4130 grade steel seamless round tubes are sourced from certified manufacturers, they are competitively priced and can be used in aerospace and industrial applications. They are offered in different wall thicknesses (2-200 mm), outer diameters (25-450 mm) and lengths, 10 mm (0.01 m) - 9000 mm (9 m). Depending on selected prroduct they comply with different AMS, ASTM or MIL specifications. Unit of measurement is 1 US Ton with Minimum Order Quantity (MOQ) 1 US Ton. They can be sea or sea/surface transported to the customer destination. Approximate time for shipping: 2 months from the time of ordering and payment receipt. Appearing price is indicative per unit of sale. Please contact us for 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.

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 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 as part of our own branded (AVIATIONEU NEW ERA) product lines in Normalized (N )  or Annealed (A) conditions indicated by the letters "NRZ" and  "ANL" respectively in the product reference code (SKU). 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 or cut to order (CTO) lengths of 12 inches (1 foot)) or multiples. Apperating price of CTO tubes is per foot (12 inches). 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.