AISI / SAE 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. AISI 4340 is also one kind of nickel chromium molybdenum steel. 4340 alloy steel is generally supplied hardened and tempered in the tensile range of 930 – 1080 Mpa.

 

Why Choose Otai for SAE 4340 round bar supplier?

Otai is one of the professional steel suppliers of SAE 4340 round bar with over 24 years of history. We are ISO 9001 certified and welcome SGS inspection before shipment. Otai is one of best 4340 steel round bar suppliers.

Supply Range (Material 4340 Stock Size)

  • SAE 4340 Round Bar Sizes: Φ14-250mm x 6000mm length (available in stock.)
  • 4340 Round Bar Stock: over 2000 tons of 4340 steel round bar in stock.
  • Choose from 4340 alloy steel round bar stock list
  • No need to wait for hot rolled 4340 round bar, immediate shipment. Save time, and make more money. 

 

4340 Steel Round Bar Price (On Sale)

  • Price: 4340 round bar price is very good now. Contact us for the best price of AISI 4340 steel.
  • Buy 4340 steel round bar at low price and sell at high point when 4340 round rod arrive your warehouse. We try to save 4340 cost for you. 

 

SAE 4340 Round Bar Condition

  • Condition: there is hot rolled (HR) condition in stock, while normalizing round bar or pre hardened (Q+T) round bar takes another 20-30 days for heat treatment.
  • Tell us your requirements, we get the right condition SAE 4340 material round bar for you, either 4340 hr round, 4340 normalized round bar or 4340 pre harden / 4340HT round bar. Right condition to right you. 
SAE aisi 4340 steel round bar

SAE 4340 Round Bar Chemical Composition

Standard Grade C Mn P S Si Ni Cr Mo
ASTM A29 4340 0.38-0.43 0.60-0.80 0.035 0.040 0.15-0.35 1.65-2.00 0.70-0.90 0.20-0.30

Steel SAE / AISI 4340 Equivalent

  • DIN Standard, 34CrNiMo6
  • Wnr. 1.6582
  • JIS SNCM439
  • BS Standard, EN24

Certificate & SGS Report

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    More Pictures of AISI 4340 Steel Round Bar Supply

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    AISI SAE 4340 ROUND BAR--QT--3

    FAQ

    Can you provide information on the price of 4340 Steel per kg or per pound?

    The price of 4340 Steel can vary based on the form, quantity, and supplier. It’s advisable to contact our sales team for the most accurate and current pricing on 4340 Steel per kg or per pound.

    What is 4340 Steel and what are its primary characteristics?

    4340 Steel is a high-strength, nickel-chromium-molybdenum alloy steel known for its toughness, wear resistance, and good hardenability. It’s often utilized in the manufacturing of high-stress parts due to its high tensile strength and durability.

    Are there any internationally recognized equivalents to 4340 Steel?

    Yes, there are internationally recognized equivalents to 4340 Steel such as the European EN24, or 36CrNiMo4, and the Japanese SNCM439. These equivalents have similar chemical compositions and mechanical properties to AISI or SAE 4340.

    How does 4340 Alloy Steel Grade compare with 4140 Alloy Steel Grade?

    While both 4340 and 4140 are high-strength alloy steels, 4340 contains additional nickel which enhances its toughness and hardenability, making it a better choice for applications requiring higher strength and toughness.

    Where can I find reputable 4340 Round Bar Suppliers or 4340 Steel Suppliers in general?

    We are one of the reputable suppliers of 4340 Round Bar and other forms of 4340 Steel. You can contact our sales team for availability, pricing, and other inquiries regarding 4340 Steel products.

    What is the difference between 4340 Annealed and 4340 Heat Treat?

    4340 Annealed refers to 4340 steel that has been softening heat treated to improve its machinability, while 4340 Heat Treat refers to a process that enhances the steel’s mechanical properties such as hardness and strength.

    Is there a Stainless Steel variant of 4340 Steel?

    No, 4340 Steel is not categorized as stainless steel, but rather as a high-strength, nickel-chromium-molybdenum alloy steel. It does not have the corrosion resistance properties associated with stainless steel.

    What specifications does 4340 Alloy Steel conform to, such as ASTM or AMS standards?

    4340 Alloy Steel conforms to several standards including ASTM A322 for hot-rolled alloy steel bars, and AMS 6414/AMS 6415 for aircraft quality steel. Adherence to these standards ensures the quality and consistency of the material.

    Can 4340 Steel be supplied in a pre-hardened condition?

    Yes, 4340 Steel can be supplied in a pre-hardened (4340 Prehard) or pre-hardened and tempered (4340 QT) condition, depending on the requirements of your application. This allows for better machinability and dimensional stability.

    Where can I find reliable suppliers of 4340 Steel Bar Stock and other 4340 Steel products?

    We are among the reliable suppliers of 4340 Steel Bar Stock and other 4340 Steel products. You can contact our sales team for detailed information on product availability, pricing, and delivery options to meet your project requirements.