4130/4140 Steel Alloy (ST4130/ST4140) Sheets/Plates

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 sheets/plates undergo a heat treating process that changes microstructure of the material. They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.

Normalized steel sheets/plates are produced to the aerospace specification AMS-6345, sometimes referred to as "Condition N". The normalized condition 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. For normalization to occur, steel is warmed to a temperature just above its upper critical point and then allowed to air cool. Air cooling produces a much quicker cooling rate producing a harder less ductile sheet which is great for making rigid parts.

Annealed steel sheets/plates are produced to the aerospace specification AMS-6350, sometimes referred to as "Condition A". The annealed condition 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. The material is uniformly heated and held at a specific temperature for a period of time and cooled in a furnace or other controlled environment to produce a finer and more uniform grain structure. This creates a softer more formable sheet that allows a tighter bend radius.

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

4130/4140 Steel Alloy (ST4130/ST4140) Sheets/Plates

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AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), also known as Chrome Moly after the 2 key alloying elements, 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 sheets are offered as part of AVIATIONEU NEW ERA product lines for a wide range of uses including structural applications, including gears, fasteners, and and aircraft exteriors. These sheets offer good weldability without compromising steel abrasion and impact resistance and can be made even stronger throough heat treatment.AVIATIONEU NEW ERA 4130 alloy steel sheets undergo a heat treating process and they are available in two different material states, Normalized or Annealed,  depending on the process of how the material is heated and cooled. The letters "NRZ" and "ANL" specify respectively Normalized or Annealed state in our Reference Codes (SKUs) for ordering of materials.  4130 Annealed steel sheets are produced to the aerospace specification AMS-6350 (sometimes referred to as "Condition A") while Normalized ones meet aerospace specification AMS-6345 (also known as "Condition N"). Annealed steel sheets are "softer" than their normalized steel counterparts and offer higher workability. Normalized steel sheets offer a higher strength tolerance.

Sourced from quality producers, these sheets are offered in different thicknesses and specific widths and lengths in inches. For additional information, please refer to our supplied documentation, the individual product presentations or contact us for quotation.

AVIATIONEU NEW ERA 4130...

Steel alloy 4130 (ST4130), also known as Chrome Moly after the 2 key alloying elements, 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 sheets are offered as part of AVIATIONEU NEW ERA product lines for a wide range of uses including structural applications, including gears, fasteners, and and aircraft exteriors. These sheets offer good weldability without compromising steel abrasion and impact resistance and can be made even stronger throough heat treatment.AVIATIONEU NEW ERA 4130 alloy steel sheets undergo a heat treating process and they are available in two different material states, Normalized or Annealed,  depending on the process of how the material is heated and cooled. The letters "NRZ" and "ANL" specify respectively Normalized or Annealed state in our Reference Codes (SKUs) for ordering of materials.  4130 Annealed steel sheets are produced to the aerospace specification AMS-6350 (sometimes referred to as "Condition A") while Normalized ones meet aerospace specification AMS-6345 (also known as "Condition N"). Annealed steel sheets are "softer" than their normalized steel counterparts and offer higher workability. Normalized steel sheets offer a higher strength tolerance.

Sourced from quality producers, these sheets are offered in different thicknesses and specific widths and lengths in inches. For additional information, please refer to our supplied documentation, the individual product presentations or contact us for quotation.

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.

AISI 4130/4140 alloy steel sheets/plates are offered as part of AVIATIONEU NEW ERA product lines for a wide range of uses. Sourced from quality producers, they are cold rolled to increase their strength and produced in accordance with ASTM specificatiions. Competitively priced and offered in different thicknesses (0.2-4 mm or 4-60 mm or 60-115 mm) and cut to order widths (500-1500 mm  or 600-3000 mm) and lengths, they consist 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) 1 Ton. 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)