Import Aisi 4140 Round Bar — Buy in wholesale FOB from Supplier in China
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Aisi 4140 Round Bar
The AISI 4140 round bar from Neworigin Special Steel Co. Ltd. is a chromium-molybdenum alloy steel designed for high-strength mechanical applications. The material’s composition includes carbon at 0.38 - 0.43%, chromium at 0.80 - 1.10%, and molybdenum at 0.15 - 0.25%, delivering a combination of tensile strength, toughness, and fatigue resistance. Available in diameters from 12 mm to 300 mm and lengths of 3 - 6 meters, this grade meets ASTM A29 and SAE standards for medium-carbon alloy steels.
This round bar is widely used in industries such as oil and gas, automotive, and aerospace for components like shafts, gears, and axles. The alloy’s hardenability allows it to achieve uniform mechanical properties in larger sections, with typical as-rolled hardness around 20 - 22 HRC. Heat treatment, such as quenching and tempering, can increase hardness to 28 - 32 HRC while maintaining ductility. The manganese content (0.75 - 1.00%) further enhances hardenability and wear resistance, making it suitable for dynamic loading conditions.
Buyers of this grade include manufacturers of machinery, heavy equipment, and structural components where high stress resistance is critical. Neworigin Special Steel offers the material in AISI, DIN, and JIS standards, with custom sizes available upon request. Packaging for export typically involves bundling with steel straps and protective coatings to prevent corrosion during transit. Confirm specific dimensions, tolerances, and additional certifications directly with the supplier to match project requirements.
| Material Grade | AISI 4140 Chromium-Molybdenum Alloy Steel |
| Carbon Content | 0.38 - 0.43% |
| Chromium Content | 0.80 - 1.10% |
| Molybdenum Content | 0.15 - 0.25% |
| Manganese Content | 0.75 - 1.00% |
| Typical As-Rolled Hardness | 20 - 22 HRC (standard for grade) |
| Typical Hardness After Heat Treatment | 28 - 32 HRC (quenched and tempered) |
| Diameter Range | 12 mm to 300 mm |
| Length Range | 3 to 6 meters |
| Standard Compliance | ASTM A29, SAE J404 (typical for grade) |
Neworigin Special Steel Co. Ltd. is headquartered in Shenzhen, Guangdong Province, with its office located on Hongmian Road in the Yingdali A206 building. The company positions itself as a trader, stockist, and exporter of specialty steels, including AISI 4140 round bar. Its focus on offering multiple standards (AISI, DIN, JIS) suggests a broad inventory tailored to international buyers, though the absence of published certifications means these must be confirmed per order.
The supplier’s harbor trust tier indicates a verified export capability, but response metrics are not currently available. Neworigin highlights competitive pricing and a wide size range as key advantages, though buyers should validate stock availability and lead times for specific diameters. The company’s description emphasises its role as a trader rather than a mill, so traceability of the material’s origin and heat numbers should be requested for critical applications.
AISI 4140 round bar is a chromium-molybdenum alloy steel offering excellent tensile strength, toughness, and fatigue resistance for demanding mechanical applications. Widely used in oil and gas drilling equipment, automotive axles, machinery components, and aerospace assemblies, this medium-carbon alloy bar meets ASTM A29 and SAE standards. Available in diameters from 12mm to 300mm with lengths of 3-6 meters, it is a preferred material for shafts, gears, and high-stress structural parts in global B2B trade.
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Sourcing AISI 4140 Round Bar from Neworigin Special Steel Co. Ltd. - China Import Guide
Before placing an order, verify the chemical composition and mechanical properties of the AISI 4140 round bar against your project’s specifications. Request mill test certificates (MTCs) to confirm compliance with ASTM A29 or equivalent standards. For critical applications, such as aerospace or oilfield components, ensure the material meets additional requirements like NACE MR0175 for sour service or AMS 6382 for aerospace-grade steel.
Clarify logistics details, including the port of loading (likely Shenzhen or Guangzhou for this supplier) and whether the company can arrange inland transport. Lead times for standard sizes may be 4 - 6 weeks, but custom diameters or lengths could extend this to 8 - 10 weeks. Incoterms such as FOB Shenzhen are common, but confirm whether the supplier can accommodate CFR or CIF terms. Payment terms typically require a 30% deposit, with the balance due before shipment.
Conduct quality checks to verify dimensional accuracy, surface finish, and absence of defects such as cracks or seams. For heat-treated bars, request hardness test reports and confirm the process was performed to your specifications. Third-party inspection at the supplier’s facility or pre-shipment can provide additional assurance. Ensure all bars are marked with heat numbers, grade, and size for traceability, and request documentation such as packing lists and certificates of conformance.
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30 suppliersBuy Aisi 4140 Round Bar in Bulk — Verified Supplier in China
When sourcing Aisi 4140 Round Bar for your business, securing the right balance of quality and cost is essential. Neworigin Special Steel Co. Ltd., a verified supplier based in China, offers this product with key specifications including AISI 4140 / SAE 4140 (Chromium-Molybdenum Alloy Steel), C 0.38-0.43%, Cr 0.80-1.10%, Mn 0.75-1.00%, Mo 0.15-0.25%, Si 0.15-0.30%, and Diameter 12mm - 300mm; Length 3m - 6m (custom cut available). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $501500/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7228.30, making it a staple in the Steel Bars sector with strong demand from importing countries worldwide.
Aisi 4140 Round Bar Specifications, Trade Terms & Pricing
Importing Aisi 4140 Round Bar requires careful attention to shipping logistics, customs compliance, and secure payment terms. Neworigin 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 7228.30 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 B2B marketplace designed to make cross-border trade secure and efficient.
About Neworigin Special Steel Co. Ltd. — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Aisi 4140 Round Bar 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 Bars category and connect with top-tier exporters on our comprehensive global B2B marketplace. Start your sourcing journey today.
Import Aisi 4140 Round Bar — Shipping, Logistics & Customs
Importing Aisi 4140 Round Bar 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 7228.30 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 Aisi 4140 Round Bar
What is the wholesale price of Aisi 4140 Round Bar?
The current listed wholesale price for Aisi 4140 Round Bar from Neworigin Special Steel Co. Ltd. is $501500/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Neworigin Special Steel Co. Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for Aisi 4140 Round Bar?
The supplier, Neworigin Special Steel Co. Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Aisi 4140 Round Bar. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Aisi 4140 Round Bar?
For international shipping and customs clearance, Aisi 4140 Round Bar is classified under HS Code 7228.30. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Aisi 4140 Round Bar from China?
To import Aisi 4140 Round Bar from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Neworigin Special Steel Co. Ltd.. Ensure you have the necessary import licenses for Steel Bars products in your destination country.
Is Neworigin Special Steel Co. Ltd. a verified supplier?
Yes, Neworigin 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 Aisi 4140 Round Bar?
The key specifications for Aisi 4140 Round Bar supplied by Neworigin Special Steel Co. Ltd. include AISI 4140 / SAE 4140 (Chromium-Molybdenum Alloy Steel), C 0.38-0.43%, Cr 0.80-1.10%, Mn 0.75-1.00%, Mo 0.15-0.25%, Si 0.15-0.30%, and Diameter 12mm - 300mm; Length 3m - 6m (custom cut 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 Aisi 4140 Round Bar?
Neworigin Special Steel Co. Ltd. offers Aisi 4140 Round Bar with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Aisi 4140 Round Bar the most?
Aisi 4140 Round Bar is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Neworigin Special Steel Co. Ltd. through our platform.
What certifications does this Aisi 4140 Round Bar supplier hold?
Neworigin Special Steel Co. Ltd. maintains international quality certifications. These ensure that the Aisi 4140 Round Bar meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Aisi 4140 Round Bar on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Neworigin 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 Neworigin Special Steel Co. Ltd..
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