40CrNiMoA Grade Alloy Steel Round Bar with Polished Surface for Mold Steel Application
Price:
US $954-1,062 / Ton
MOQ:
1 Ton
Delivery Time:
Negotiable
Product Description
China Alloy Steel Grade 40CrNiMoA Steel Round Bar
High-quality alloy steel round bars manufactured to DIN 40CrNiMo22 specifications, offering exceptional strength and durability for demanding industrial applications.
Product Specifications
Product Type: Alloy Steel Round Bar
Diameter Range: 13 - 300mm
Standard Length: 6m or custom cutting available
Material Grade: 4340 Alloy Steel
Available Services: Cutting, polishing, packing, heat treatment
Brand Sources: BAOSTEEL, XINGCHENG, DSS, CHONGQING, XNSS, HLXT
Standards Compliance: GB, ASTM, JIS, EN, DIN
Company Type: Storage company with processing services
Material Overview
AISI 4340 steel (UNS G43400) is an ultra-high strength medium carbon low alloy steel that combines deep hardenability with high ductility, toughness, and strength. This material offers excellent fatigue resistance, creep resistance, and maintains good strength retention at high temperatures without significant softening.
Chemical Composition of 4340 Alloy Steel
| ASTM Standard | Steel Grade | C | Si | Mn | P (≤) | S (≤) | Ni | Cr | Mo | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A29/A29M | 4340 (UNS G43400) | 0.38-0.43 | 0.15-0.35 | 0.60-0.80 | 0.035 | 0.04 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 | Steel Bars, Carbon and Alloy, Hot-Wrought |
Additional applicable standards: ASTM A322, ASTM A519/A519M, ASTM A646/A646M
Mechanical Properties of 4340 Alloy Steel
| Condition | Tensile Strength MPa (ksi), ≥ | Yield Strength MPa (ksi), ≥ | Elongation in 50 mm (2 in.), ≥ | Reduction in Area, %, ≥ | Hardness, HB, ≤ |
|---|---|---|---|---|---|
| Normalized at 870°C (1600°F) | 1282 (186) | 862 (125) | 12.2 | 36.3 | 363 |
| Annealed at 810°C (1490°F) | 745 (108) | 470 (68) | 22.0 | 50.0 | 217 |
| Oil quenched from 800°C (1475°F) and tempered at 540°C (1000°F) | 1207 (175) | 1145 (166) | 14.2 | 45.9 | 352 |
Applications
SAE AISI 4340 steel is ideal for applications requiring high strength under severe conditions and heavy loading. Available in billet, bar, forging, sheet, pipe, and welding wire forms, this material is commonly used for:
- Bolts, screws, and other fasteners
- Gears, pinions, shafts, and mechanical components
- Engine crankshafts and piston rods
- Aircraft landing gear and structural components
International Equivalents
| Region | Standard | Grade |
|---|---|---|
| United States | AISI/SAE/ASTM | 4340 (UNS G43400) |
| European Union | SAE | AMS6414 |
| China | GB/T 3077 | 40CrNi2Mo |
| Japan | JIS G 4053 | SNCM439 |
Company Capabilities
As a leading steel supplier, we maintain extensive inventory and processing capabilities:
- Monthly sales volume: 40,000-60,000 tons of various steel products
- 4+ dedicated warehouses for material storage
- 30+ material grades consistently in stock
- 800+ available sizes ensuring short delivery times
- Specialized processing warehouse for cutting, polishing, and heat treatment services
- Global sales network serving machinery, automotive, forging, and tool industries
Available Steel Grades
We stock a comprehensive range of popular steel grades including EN series, carbon steels, alloy steels, stainless steels, and specialized tool steels from international standards including SAE, AISI, BS, DIN, GOST, and ASTM specifications.
Product Gallery
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben