4130/4140 Steel Alloy (ST4130/ST4140) Bars/Rods

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.

4130/4140 steel bars/rods are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled. Sourced from quality producers, they are offered in different specifications, diameters/thicknesses, pre-cut or cut-to-oder lengths depending on the order quantity and requirements. For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

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

4130/4140 Steel Alloy (ST4130/ST4140) Bars/Rods

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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 steel bars/rods are offered as part of our own branded (AVIATIONEU NEW ERA) product lines, featuring good strength and weldability without compromising steel abrasion or impact resistance. They do not require further heat treatment and are commonly used in structural applications, including gears, fasteners, and some aircraft exterior. Offered in Normalized condition and Cold Finished as indicated by the letters "NRZ" and  "CF" respectively in the product reference code (SKU). These bars/rods comply with ASTM -A108, AMS -6348, AMS -6370 & AMS/MIL -S-6758 specifications. Available in different diameters and lengths in inches. Unless otherwise mentioned, there is additional cost if manufacturing test reports are required.

For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), aka Chrome Moly, after the 2 key composition elements, chromium & 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/rods, sheets and plates). Available in two material states (Normalized and Annealed) depending on the process of how the material is heated and cooled. The Normalized condition (aka "Condition N") is the harder and stronger condition, best used when forming is not needed while the Annealed condition (aka "Condition A") is the softer and formable condition.

4130 steel bars/rods are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. Sourced from quality producers, most of these bars/rods are produced as “Cold Finished Normalized,” (aka “Condition D4”), unless otherwise specified. They are offered in round, rectangullar (flat), square, and hex shapes, in different dimesions in inches and cut to order (CTO) lengths in feet (*) and meet several AMS specifications, most common being AMS-S-6758 and AMS- 6348. Widely used in a variety of applications due to their excellent strength to weight ratio,weldability by all conventional methods and resistance to scaling and oxidation. 

Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

(*) As per vendors' requirements, certain 4130 steel bars/rods are ONLY SOLD in 3 feet increments, i.e. cut lengths can only be set to 3, 6, 9 feet etc. as mentioned in the respectivel product presentations. In this case, appearing prices are per 3 feet length and the Minimum Order Quantity (MOQ) is 3 pieces for each of selected rod/bar. Required cut lengths should be specified at the time of ordering.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130),aka Chrome Moly,after the 2 key composition elements,chromium & 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/rods, sheets and plates). Available in two material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.The Normalized condition (aka "Condition N") is the harder and stronger condition, best used when forming is not needed while the Annealed condition (aka "Condition A") is the softer and formable condition.

4130 steel bars/rods in round, rectangullar (flat), square and hexagonal shapes (cross sections) are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. Sourced from quality producers, most of these bars/rods are produced, unless otherwise specified, as “Cold Finished Normalized” (aka “Condition D4”), indicated by the letters "NRZ" and  "CF" in the product SKUs. They come in different dimesions in inches and cut to order (CTO) lengths in feet (*) and meet several AMS specifications, most common being AMS-S-6758 and AMS- 6348. They are widely used in a variety of applications due to their excellent strength to weight ratio,weldability by all conventional methods and resistance to scaling and oxidation. 

Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

(*) As per vendors' requirements, certain 4130 steel bars/rods are ONLY SOLD in 3 feet increments, i.e. cut lengths can only be set to 3, 6, 9 feet etc. as mentioned in the respectivel product presentations. In this case, appearing prices are per 3 feet length and the Minimum Order Quantity (MOQ) is 3 pieces for each of selected rod/bar. Required cut lengths should be specified at the time of ordering.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130),aka Chrome Moly,after the 2 key composition elements,chromium & 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/rods, sheets and plates). Available in two material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.The Normalized condition (aka "Condition N") is the harder and stronger condition, best used when forming is not needed while the Annealed condition (aka "Condition A") is the softer and formable condition.

4130 steel bars/rods in round, rectangullar (flat), square and hexagonal shapes (cross sections) are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. Sourced from quality producers, most of these bars/rods are produced, unless otherwise specified, as “Cold Finished Normalized” (aka “Condition D4”), indicated by the letters "NRZ" and  "CF" in the product SKUs. They come in different dimesions in inches and cut to order (CTO) lengths in feet (*) and meet several AMS specifications, most common being AMS-S-6758 and AMS- 6348. They are widely used in a variety of applications due to their excellent strength to weight ratio,weldability by all conventional methods and resistance to scaling and oxidation. 

Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

(*) As per vendors' requirements, certain 4130 steel bars/rods are ONLY SOLD in 3 feet increments, i.e. cut lengths can only be set to 3, 6, 9 feet etc. as mentioned in the respectivel product presentations. In this case, appearing prices are per 3 feet length and the Minimum Order Quantity (MOQ) is 3 pieces for each of selected rod/bar. Required cut lengths should be specified at the time of ordering.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130),aka Chrome Moly,after the 2 key composition elements,chromium & 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/rods, sheets and plates). Available in two material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.The Normalized condition (aka "Condition N") is the harder and stronger condition, best used when forming is not needed while the Annealed condition (aka "Condition A") is the softer and formable condition.

4130 steel bars/rods in round, rectangullar (flat), square and hexagonal shapes (cross sections) are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. Sourced from quality producers, most of these bars/rods are produced, unless otherwise specified, as “Cold Finished Normalized” (aka “Condition D4”), indicated by the letters "NRZ" and  "CF" in the product SKUs. They come in different dimesions in inches and cut to order (CTO) lengths in feet (*) and meet several AMS specifications, most common being AMS-S-6758 and AMS- 6348. They are widely used in a variety of applications due to their excellent strength to weight ratio,weldability by all conventional methods and resistance to scaling and oxidation. 

Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

(*) As per vendors' requirements, certain 4130 steel bars/rods are ONLY SOLD in 3 feet increments, i.e. cut lengths can only be set to 3, 6, 9 feet etc. as mentioned in the respectivel product presentations. In this case, appearing prices are per 3 feet length and the Minimum Order Quantity (MOQ) is 3 pieces for each of selected rod/bar. Required cut lengths should be specified at the time of ordering.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130),aka Chrome Moly,after the 2 key composition elements,chromium & 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/rods, sheets and plates). Available in two material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.The Normalized condition (aka "Condition N") is the harder and stronger condition, best used when forming is not needed while the Annealed condition (aka "Condition A") is the softer and formable condition.

4130 steel bars/rods in round, rectangullar (flat), square and hexagonal shapes (cross sections) are offered as part of our own branded (AVIATIONEU NEW ERA) product lines. Sourced from quality producers, most of these bars/rods are produced, unless otherwise specified, as “Cold Finished Normalized” (aka “Condition D4”), indicated by the letters "NRZ" and  "CF" in the product SKUs.They are widely used in a variety of applications due to their excellent strength to weight ratio,weldability by all conventional methods and resistance to scaling and oxidation. 

AVIATIONEU NEW ERA 4130 Steel Alloy Rectangular (Flat) Bars/Rods are AMS S 6758 Condition D4 (Cold Finished Normalized) and Tempered MIL S 6758, unless otherwise specified. They are offered in different widths, thicknesses and pre-cut lengths in inches.  Also available in cut to order lengths (please refer to the respective product presentation).  It's best to keep the lengths under 5 feet for air shipping. Longer bars can only be shipped via standard sea/ground transportation.

Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation, the individual product presentations or contact us.

AVIATIONEU NEW ERA...

AISI/SAE(*) 4130 and 4140 grade steels are low-alloy steels containing chromium and molybdenum as common composition elements. Both are are popular steel materials due to their properties. AISI 4130 grade steel shows good overall combinations of strength, toughness and fatigue strength with good atmospheric corrosion resistance while AISI 4140 grade steel features a high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. Both alloys are weldable with the use of all conventional techniques (AISI 4130 alloy's lower carbon composition compared to AISI 4140 allows easier welding) and machinable in the annealed condition. To make them stronger they need to be subjected to heat treatment, such as annealing, cold working, etc. 4140 and 4130 grade steels are wideky used in aerospace, oil and gas, automotive, agricultural and defense industries.

Round bars from AISI 4130/4140 structural steel alloys are offered as part of AVIATIONEU NEW ERA product lines for a wide range of uses in different applications (gears, connection rods, stem assemblies, pump shafts, tool holders and others. Sourced from quality producers, they are competitively priced and offered in different diameters ( 5.5-500 mm), pre-cut (5.8m, 6m, 11.8m) and cut to order lengths, consisting a cost effective solution when large quantities of such sheets are demanded. Unit of sale is 1 Ton (US or Metric as specified) with Minimum Order Quantity (MOQ) 3 Tons. Sea/sea-surface transport to customer destinationcan 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 comparison table of specifications for different steel alloys or contact us for quotation.

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