AISI / SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general-purpose high tensile steel for components, like axles, shafts, bolts, gears, and other applications.
Otai is one of the professional steel suppliers of SAE 4140 round bar with over 24 years of history. We are ISO 9001 certified and welcome SGS inspection before shipment.
Supply Range (4140 Stock Size)
- 4140 Round Bar Sizes: Φ14-300mm x 6000mm length (popular size like 30mm 4140 round bar, 2″ 4140 round bar, 4″ 4140 round bar, 8″ 4140 round bar, 1″ 4140 round bar, all available in stock)
- 4140 Round Bar Stock: over 2000 tons of 4140 steel round bar in stock.
- No need to wait for hot rolled 4140 round bar, immediate shipment. Save time, and make more money.
4140 Steel Round Bar Price
- Price: 4140 round bar price is very good now. Contact us for the 4140 steel rod on-sale price.
- Buy 4140 steel round bar at low price and sell at high point when 4140 round rod arrive your warehouse.
SAE 4140 Round Bar Condition
- Condition: there is hot rolled condition in stock, while normalizing round bar or pre hardened (Q+T) round bar takes another 20-30 days heat treatment.
- Tell us your requirements, we get the right condition 4140 round bar for you, either 4140 ht round, 4140 normalized round bar or 4140 pre harden / 4140T round bar. Right condition to right you.
SAE 4140 Round Bar Chemical Composition
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A29 | 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.04 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
Steel SAE / AISI 4140 Equivalent
- DIN Standard, 42CrMo4
- Wnr. 1.7225
- JIS SCM 440
- BS Standard, EN19
Certificate & SGS Report
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FAQ
What is the price range for 4140 Round Bar?
The price of 4140 Round Bar varies based on size, quantity, and supplier. For an accurate price, it’s advisable to contact our sales team with your specific requirements.
What are the features of AISI 4140 Round Bar?
AISI 4140 Round Bar is known for its excellent hardness, strength, and wear resistance, making it suitable for various mechanical and structural applications including gears, shafts, and fasteners.
How does SAE 4140 Round Bar compare with other grades of steel?
SAE 4140 Round Bar is a high-quality steel with superior strength, hardness, and wear resistance, making it a preferred choice for applications requiring durable materials.
Who are the reputable suppliers of Round Bar AISI 4140?
We are among the reputable suppliers of Round Bar AISI 4140, providing high-quality products to meet your industrial needs. You can contact our sales team for availability and pricing.
What are the available sizes for 4140 Steel Round Bar?
Generally, the diameter from 14mm up to 300mm is available in stock at rolled and black surface condition. If you need larger diameter up to 2000mm, it needs new production with lead time around 30-40 days depending on your order sizes and quantity.
How is the 4140 HT Round Bar different from other 4140 round bars?
The 4140 HT (Heat Treated) Round Bar undergoes a heat treatment process to enhance its mechanical properties, making it even more durable and resistant to wear.
Is there a variety of finishes available for 4140 Round Stock?
Yes, we also keep some stock for 4140 ground round bar and rod. If you need big quantity, we are also equipped to machine to your sizes and tolerance in short delivery time.
What are the key features of the 4140 HTSR (Heat Treated, Stress Relieved) Round Bar?
The 4140 HTSR Round Bar undergoes heat treatment and stress relieving processes to improve its mechanical properties, such as strength and toughness, while also reducing residual stresses within the material.
What is the 4140 TG&P (Turned, Ground, and Polished) Round Bar, and how is it used?
The 4140 TG&P Round Bar is processed through turning, grinding, and polishing to achieve a smooth surface finish and precise dimensional tolerances. It’s used in applications requiring a high degree of surface quality and accurate dimensions, such as in the manufacturing of shafts and other precision components.