Import 4140 Alloy Steel — Buy in wholesale FOB from Supplier in United States
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4140 Alloy Steel
4140 alloy steel is a chromium-molybdenum low-alloy structural steel supplied by Otai Special Steel Co. Ltd. in hot-rolled plates with thicknesses ranging from 4 to 300 mm. This grade meets ASTM A29/A29M standards and is engineered for demanding applications where tensile strength and toughness are critical, such as oil and gas equipment, machinery components, and automotive parts.
The material composition of 4140 alloy steel typically includes 0.38-0.43% carbon, 0.75-1.00% chromium, and 0.15-0.25% molybdenum, balanced with manganese, silicon, and trace elements to enhance hardenability and wear resistance. Standard industry practice for this grade includes heat treatment processes like annealing, normalising, or quenching and tempering to achieve desired mechanical properties, with typical tensile strength exceeding 655 MPa in the annealed condition.
Industrial buyers source 4140 alloy steel for fabrication projects requiring durable, heat-treatable components such as gears, shafts, and axles. The steel’s versatility makes it suitable for global manufacturing sectors, including heavy machinery, aerospace, and energy. Buyers should confirm thickness availability, heat treatment status, and surface finish requirements with the supplier, as these factors directly impact performance in end-use applications.
| Material Grade | 4140 |
| Type | Chromium-Molybdenum Low-Alloy Structural Steel |
| Standard | ASTM A29/A29M |
| Form | Hot-Rolled Plate |
| Thickness Range | 4 - 300 mm |
| Carbon Content | 0.38 - 0.43% (typical) |
| Chromium Content | 0.75 - 1.00% (typical) |
| Molybdenum Content | 0.15 - 0.25% (typical) |
| Tensile Strength (Annealed) | 655 MPa (typical, minimum) |
| Common Applications | Oil and gas equipment, machinery components, gears, automotive parts |
| Hardenability | High (standard for chromium-molybdenum alloys) |
Otai Special Steel Co. Ltd. is a US-based supplier specialising in alloy steel products, with a focus on chromium-molybdenum grades like 4140. The company’s listing indicates a physical presence in Dongguan, Guangdong, though its primary operations are aligned with US standards and supply chains for industrial buyers.
The supplier’s profile does not disclose response metrics, verification status, or additional operational details beyond the product specifications and material grade. Buyers are advised to request direct confirmation of certifications, mill test reports, and heat treatment documentation, as these are critical for quality assurance in alloy steel sourcing.
4140 alloy steel plate is a chromium-molybdenum low-alloy structural steel with excellent tensile strength and toughness for demanding applications. Supplied in hot-rolled plates ranging 4-300mm thickness, this grade meets ASTM A29/A29M standards and is widely used in oil and gas equipment, machinery components, gears, and automotive parts. Ideal for global buyers sourcing heat-treated alloy steel plate for industrial manufacturing and fabrication projects.
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Sourcing 4140 Alloy Steel from Otai Special Steel Co. Ltd. - United States Import Guide
Before ordering 4140 alloy steel from Otai Special Steel Co. Ltd., verify the mill test reports and heat treatment certificates to confirm the material meets ASTM A29/A29M standards. Check that the thickness, width, and length dimensions align with your fabrication requirements, as tolerances can vary between batches. Request documentation for traceability, including heat numbers and chemical analysis, to ensure consistency.
Confirm logistics details such as port of shipment, Incoterms (e.g., FOB or CIF), and packaging requirements for hot-rolled plates. Lead times for alloy steel can vary based on thickness and heat treatment status, so clarify production and delivery schedules upfront. Buyers should also discuss payment terms, as alloy steel transactions often involve letters of credit or advance payments for custom orders.
Quality checks should include visual inspection for surface defects, dimensional verification against ASTM tolerances, and non-destructive testing (e.g., ultrasonic or magnetic particle inspection) for critical applications. For heat-treated material, request Charpy impact test results or hardness values to validate mechanical properties. Ensure all documentation, including certificates of conformity and material traceability, is provided before shipment.
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9 listingsTop Verified Suppliers for 4140 Alloy Steel
30 suppliersBuy 4140 Alloy Steel in Bulk — Verified Supplier in United States
When sourcing 4140 Alloy Steel for your business, securing the right balance of quality and cost is essential. Otai Special Steel Co. Ltd., a verified supplier based in United States, offers this product with key specifications including AISI 4140 / UNS G41400, Chromium-Molybdenum Alloy Steel Plate, C: 0.38-0.43%, Cr: 0.80-1.10%, Mo: 0.15-0.25%, Mn: 0.75-1.00%, Si: 0.15-0.30%, and Thickness 4-300mm, Width 1000-2500mm, Length 2000-12000mm (custom sizes available). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $933/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7225.40, making it a staple in the Steel sector with strong demand from importing countries worldwide.
4140 Alloy Steel Specifications, Trade Terms & Pricing
Importing 4140 Alloy Steel requires careful attention to shipping logistics, customs compliance, and secure payment terms. Otai Special Steel Co. Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 7225.40 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading online B2B marketplace designed to make cross-border trade secure and efficient.
About Otai Special Steel Co. Ltd. — Supplier in United States
Finding trustworthy partners is the foundation of successful importing. The supplier of this 4140 Alloy Steel has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Steel category and connect with top-tier exporters on our comprehensive B2B marketplace. Start your sourcing journey today.
Import 4140 Alloy Steel — Shipping, Logistics & Customs
Importing 4140 Alloy Steel requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 7225.40 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About 4140 Alloy Steel
What is the wholesale price of 4140 Alloy Steel?
The current listed wholesale price for 4140 Alloy Steel from Otai Special Steel Co. Ltd. is $933/Bags on FOB terms from United States. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Otai Special Steel Co. Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for 4140 Alloy Steel?
The supplier, Otai Special Steel Co. Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for 4140 Alloy Steel. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for 4140 Alloy Steel?
For international shipping and customs clearance, 4140 Alloy Steel is classified under HS Code 7225.40. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import 4140 Alloy Steel from United States?
To import 4140 Alloy Steel from United States, negotiate shipping terms (FOB, CIF, or EXW) directly with Otai Special Steel Co. Ltd.. Ensure you have the necessary import licenses for Steel products in your destination country.
Is Otai Special Steel Co. Ltd. a verified supplier?
Yes, Otai Special Steel Co. Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of 4140 Alloy Steel?
The key specifications for 4140 Alloy Steel supplied by Otai Special Steel Co. Ltd. include AISI 4140 / UNS G41400, Chromium-Molybdenum Alloy Steel Plate, C: 0.38-0.43%, Cr: 0.80-1.10%, Mo: 0.15-0.25%, Mn: 0.75-1.00%, Si: 0.15-0.30%, and Thickness 4-300mm, Width 1000-2500mm, Length 2000-12000mm (custom sizes available). For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of 4140 Alloy Steel?
Otai Special Steel Co. Ltd. offers 4140 Alloy Steel with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import 4140 Alloy Steel the most?
4140 Alloy Steel is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Otai Special Steel Co. Ltd. through our platform.
What certifications does this 4140 Alloy Steel supplier hold?
Otai Special Steel Co. Ltd. maintains international quality certifications. These ensure that the 4140 Alloy Steel meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for 4140 Alloy Steel on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Otai Special Steel Co. Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Otai Special Steel Co. Ltd..
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