When engineers or buyers look for a reliable alloy steel, 4140 steel</strong> often comes up as one of the top choices. Its strength, toughness, and machinability make it an all-around performer across industries like automotive, oil & gas, toolmaking, and heavy machinery. But when it comes to sourcing this material, you probably ask: what sizes are available, how much does it cost, and where can I buy it? Let’s break it all down.
🌟 What Makes 4140 Steel Special?
4140 belongs to the chromium-molybdenum alloy steel family. It combines strength, toughness, and wear resistance, making it suitable for demanding parts such as gears, shafts, and drill collars. The ability to heat treat 4140 into various hardness levels also gives it a strong edge over plain carbon steels.
Buyers like it because:
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It’s stronger than mild steel, yet not too difficult to machine.
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It’s available in multiple forms—plates, round bars, flat bars, and precision ground 4140 steel stock</strong>.
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It balances cost and performance better than higher-alloy steels.
📏 Common 4140 Steel Stock Sizes
One of the most common questions is about -start=”1372″ data-end=”1398″>4140 steel stock sizes. Stockists usually keep a wide range to serve different industries.
| Form | Size Range (Typical) | Applications |
|---|---|---|
| Round bar | Ø 6mm – 800mm | Shafts, spindles, axles |
| Flat bar / Plate | 6mm – 300mm thick | Machine bases, dies, wear plates |
| Square bar | 10mm – 300mm | Tooling blocks, heavy components |
| Tubes (seamless / welded) | Ø 20mm – 500mm OD | Hydraulic parts, oil & gas tools |
👉 If you need non-standard sizes, many suppliers offer -=””>end=”2131″>cut to size 4140 steel stock</strong>, which helps reduce waste and machining time.
-s=””>tart=”2186″ data-end=”2230″>💲 How Much Does 4140 Steel Stock Cost?
ata-end=””>=”2293″>The <strong data-=””>start=”2236″ data-end=”2262″>4140 steel stock price depends on multiple factors:
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Size & thickness
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Heat treatment condition (annealed, pre-hardened, quenched & tempered)
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Quantity ordered
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Market demand and alloy surcharge
As of now, 4140 round bar in annealed condition may range from $1.50 – $2.50 per kg for bulk orders, while precision ground stock and special sizes can cost more.
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ta-sta=””>rt=”2626″ data-end=”2663″>🏭 4140 Steel Stock Availability
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>a-end=”2908″>Annealed condition: easier for machining and later heat treatment.
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Pre-hardened condition (28-32 HRC): reduces processing steps, suitable for mold bases and fixtures.
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Quenched & tempered condition: ideal for high-stress applications like drill collars.
For urgent needs, many suppliers also offer <strong data-start=”3206″ data-end=”3230″>buy 4140 steel stock</strong> online, with mill test certificates (MTC) included.
🛠️ Machining and Processing 4140 Steel
When customers purchase machining 4140 steel, they look for good machinability combined with strength. In its annealed condition, 4140 machines relatively easily using carbide tooling. For tougher applications, pre-hardened 4140 requires slower speeds and high cutting fluids to control heat.</p>&lt;p data-start=”3649″ data-end=”3815″>Some suppliers also stock <strong data-start=”3675″ data-end=”3701″>4140 alloy steel stock</strong> with specific surface finishes like turned, ground, and polished (TGP) for applications where precision is key.
📦 Why 4140 Steel Suppliers Matter</h3><p class=”yoast-text-mark” data-start=”3869″ data-end=”>Not all suppliers are the same. The best <strong data-start=”>4140 steel stock suppliers provide:
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Wide stock ranges with fast delivery
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Quality assurance (UT test, chemical analysis, hardness testing)
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Cutting-to-size services
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Heat treatment options
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Competitive global shipping
🌍 Industrial Applications of 4140 Steel
Case studies show how industries rely on 4140 stock:
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Automotive: gears, crankshafts, spindles
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Oil & Gas: drill collars, couplings, valve bodies
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Mold Industry: pre-hardened plates for mold bases
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Heavy Equipment: wear parts, connecting rods
start=”4483″ data-en=””>d=”4629″>The ability to order <strong data-start=”4504″ data-end=”4533″>4140 steel stock for sale in various sizes makes it adaptable for both small workshops and multinational manufacturers.
💡 Company Advantages – Why Choose Otai Special Steel?
start=””>=”4697″ data-end=”4854″>At Otai Special Steel, we maintain over <strong data-start=”4737″ data-end=”4772″>10,000 tons of 4140 steel stock</strong> in different shapes and sizes, ranging from 6mm to 300mm thickness. We provide:
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a-end=”4902″>Cut-to-size service with minimal lead times
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art=”4905″ data-end=”4980″>Heat treatment (annealing, quenching & tempering, nitriding) upon request
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International quality certifications (SGS, mill test reports)
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Strong track record supplying companies like Thyssenkrupp, Borealis, and Schlumberger
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Cost-effective solutions with reliable delivery worldwide
❓ FAQ
Q1: Can I order small quantities of 4140 steel?
Yes, most suppliers accept small orders, especially for machining projects.
Q2: What is the lead time for delivery?
Stock items usually ship within 3–7 days. Special heat-treated or cut-to-size orders may take longer.
<p>-start=”5507″ data-end=”5649″>tar=””>t=”5507″ data-end=”5562″>Q3: Is precision ground 4140 steel stock available?
Yes, many suppliers—including Otai—carry TGP (Turned, Ground, and Polished) stock.
Q4: What hardness is common for pre-hardened 4140?
Typically 28-32 HRC, though it can be adjusted through heat treatment.
Q5: Can 4140 steel be welded?
Yes, but preheating (around 200–400°C) and post-weld heat treatment are recommended to avoid cracking.
