- Verified manufacturer
- Pre-shipment inspection
- DDP door-to-door
Sourced by GoodsFromChina
- Free quote, compared across factories
- Samples consolidated & checked
- AQL inspection before balance payment
- Sea, air, express & DDP shipping
Hot Rolled AISI 4140 4130 Low Carbon Alloy Steel Solid Round Rod 6-600mm 42CrMo 30CrMo Steel Bars with Competitive Price Alloy Steel Bar
Steel Round Bar made of A36 and S235 — Type Carbon Steel Bar, Standard AISI, ASTM, GB, JIS, DIN, BS. MOQ 25 tons, US$550.00/ton. Factory-direct from China.
- Material
- A36, S235, S275, DC01, 1045, Gr50, D2, 1066
- Type
- Carbon Steel Bar
- Application
- Structural Steel Bar, Tool Steel Bar, Die Steel Bar
- Certification
- MTC 3.1 (EN 10204), ISO 9001, ultrasonic test report (EN 10160 Class II)
- Warranty
- 1 Year
- Shape
- Round Square Flat Hexagon Irregular Bar
At a glance
- Product
- Hot Rolled AISI 4140 4130 Low Carbon Alloy Steel Solid Round Rod 6-600mm 42CrMo…
- Category
- Steel Round Bar
- Price
- US$550.00 / ton
- Minimum order
- 25 tons
- Origin
- China
- Customization
- On request
- Certification
- MTC 3.1 (EN 10204), ISO 9001, ultrasonic test report (EN 10160 Class II)
- Packaging
- Seaworthy Packing for Exporting
- HS code
- 7301200000
Last updated
Specifications
| Model NO. | AISI 4140 4130 42CrMo 30CrMo |
|---|---|
| Standard | AISI, ASTM, GB, JIS, DIN, BS |
| Technique | Hot Rolled |
| Application | Structural Steel Bar, Tool Steel Bar, Die Steel Bar |
| Surface Treatment | Color Coated |
| Alloy | Alloy |
| Special Use | Mold Steel, Free Cutting Steel, Cold Heading Steel |
| Material | A36, S235, S275, DC01, 1045, Gr50, D2, 1066 |
| Delivery Time | 15-20days |
| Length | 1-12m |
| Shape | Round Square Flat Hexagon Irregular Bar |
| Diameter | 4-800mm |
| Transport Package | Seaworthy Packing for Exporting |
| Specification | As Requirement |
| Origin | China |
| HS Code | 7301200000 |
| Production Capacity | 50000ton/Month |
| After-sales Service | Free Replacement for Defective Products |
| Warranty | 1 Year |
| Type | Carbon Steel Bar |
| requiring strength, toughness, and durability | Automotive Industry |
| Thickness | 5mm - 100mmWidth: 20mm - 300mm |
| Across flats | 10mm - 100mm |
| Standard length | 6000mm/12000mm; custom lengths available |
| Delivery Condition | Quenched & Tempered (QT) |
| Hardness | 28-32 HRC |
| Surface Finish | Shot-blasted and oiled |
| Certification | MTC 3.1 (EN 10204), ISO 9001, ultrasonic test report (EN 10160 Class II) |
| to differentiate your offer | Material Certification |
| Durable and Versatile Material | Our carbon steel round bars are made from high-quality 1.2714, 1.2738, 1.2311, 1.2312, 4340, and 4130 alloy steel, ensuring excellent durability and versatility for various applications. |
| Wide Range of Standards | We cater to global requirements with our products meeting AISI, ASTM, BS, DIN, GB, and JIS standards, ensuring seamless integration into any project. |
| Customizable Options | Available in various shapes, including round, square, flat, hexagon, and irregular, our carbon steel round bars can be tailored to meet specific user requirements, such as for a construction project. |
| Specification | Details |
|---|---|
| Primary Standard | ASTM A29/A29M (USA), SAE J403 |
| Common Names | 4140 alloy steel bar, 4140 quenched and tempered (QT) bar, 4140 chrome-moly bar |
| International Equivalents | - DIN EN 10083-3: 42CrMo4 (1.7225) (Europe)- JIS G4053: SCM440 (Japan)- GB/T 3077: 42CrMo (China)- ISO 683-13: 42CrMo4- BS EN 10083-3: EN19 (UK)- AFNOR: 42CD4 (France) |
| Typical Delivery Forms | Round bar, square bar, flat bar, hexagonal bar, forged bar |
| Delivery Conditions | Hot-rolled, cold-drawn, normalized, quenched & tempered (QT), annealed |
| Element | Content Range (%) | Role |
|---|---|---|
| Carbon (C) | 0.38-0.43 | Primary strength contributor; enables heat treatment |
| Silicon (Si) | 0.15-0.35 | Deoxidizer; improves strength and heat resistance |
| Manganese (Mn) | 0.75-1.00 | Enhances hardenability and tensile strength |
| Chromium (Cr) | 0.80-1.10 | Increases hardness, wear resistance, and corrosion resistance |
| Molybdenum (Mo) | 0.15-0.25 | Boosts hardenability, high-temperature strength, and prevents temper brittleness |
| Phosphorus (P) | ≤0.035 | Controlled impurity (max 0.030% for premium grades) |
| Sulfur (S) | ≤0.040 | Controlled impurity (free-machining grades have 0.08-0.15%) |
| Nickel (Ni) | ≤0.25 | Trace element (some grades may have higher content) |
| Property | Minimum Value | Typical Range | Test Standard |
|---|---|---|---|
| Tensile Strength (σb) | ≥1080 MPa | 1080-1200 MPa | ASTM E8/E8M |
| Yield Strength (σ0.2) | ≥930 MPa | 930-1050 MPa | ASTM E8/E8M |
| Elongation (δ5) | ≥12% | 12-18% | ASTM E8/E8M |
| Reduction of Area (ψ) | ≥45% | 45-55% | ASTM E8/E8M |
| Impact Energy (Akv) | ≥63 J (at -20°C, V-notch) | 63-80 J | ASTM E23 |
| Hardness | 28-32 HRC (QT condition) | 28-36 HRC | ASTM E18 |
| Process | Temperature | Cooling Method | Purpose |
|---|---|---|---|
| Quenching | 840-870°C | Oil cooling | Hardening to achieve base strength (55-60 HRC) |
| Tempering | 540-680°C | Air cooling | Reducing brittleness while maintaining strength (28-36 HRC) |
| Normalizing | 850-900°C | Air cooling | Homogenizing structure before final heat treatment |
| Annealing | 680-700°C | Furnace cooling | Softening for improved machinability (HB ≤217) |
| Induction Hardening | 900-950°C | Water spray | Enhancing surface hardness (50-55 HRC) for wear resistance |
| Stress Relieving | 550-600°C | Air cooling | Removing internal stresses after machining/welding |
| Bar Type | Dimension Range | Notes |
|---|---|---|
| Round Bar | - Hot-rolled: Ø5mm - 200mm- Forged: Ø140mm - 900mm (custom up to 3000mm)- Cold-drawn: Ø3mm - 100mm | Most common form; available in precision tolerances |
| Square Bar | 10mm × 10mm - 300mm × 300mm | Used for shafts, keys, and structural components |
| Flat Bar | Thickness: 5mm - 100mmWidth: 20mm - 300mm | Ideal for wear plates, brackets, and custom fabrication |
| Hexagonal Bar | Across flats: 10mm - 100mm | Used for bolts, nuts, and precision components |
| Length | 3000mm - 12000mm | Standard length: 6000mm/12000mm; custom lengths available |
| Surface Finish | Hot-rolled (black), cold-drawn (bright), shot-blasted, or coated | According to customer requirements |
| Quality Grade | I/II/III (ultrasonic testing available for critical applications) | EN 10160 UT Class II standard for high-integrity components |
Product details
Hot Rolled AISI 4140 4130 Low Carbon Alloy Steel Solid Round Rod 6-600mm 42CrMo 30CrMo Steel Bars with Competitive Price Alloy Steel Bar is a steel round bar product (carbon steel bar) manufactured in China and available to buyers worldwide through the GoodsFromChina sourcing service. Typical uses include Structural Steel Bar, Tool Steel Bar, Die Steel Bar.
Key features
- Material: A36, S235, S275, DC01, 1045, Gr50, D2, 1066
- Type: Carbon Steel Bar
- Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
- Certification: MTC 3.1 (EN 10204), ISO 9001, ultrasonic test report (EN 10160 Class II)
- Warranty: 1 Year
- Shape: Round Square Flat Hexagon Irregular Bar
- Standard: AISI, ASTM, GB, JIS, DIN, BS
- Technique: Hot Rolled
Durable and Versatile Material
Our carbon steel round bars are made from high-quality 1.2714, 1.2738, 1.2311, 1.2312, 4340, and 4130 alloy steel, ensuring excellent durability and versatility for various applications.
Wide Range of Standards
We cater to global requirements with our products meeting AISI, ASTM, BS, DIN, GB, and JIS standards, ensuring seamless integration into any project.
Customizable Options
Available in various shapes, including round, square, flat, hexagon, and irregular, our carbon steel round bars can be tailored to meet specific user requirements, such as for a construction project.
Ordering & packaging
Minimum order quantity is 25 tons. Standard export packaging: Seaworthy Packing for Exporting. HS code: 7301200000. Every order can include a pre-shipment quality inspection and consolidated shipping by sea, air or express, including DDP delivery.
How we source this product for you
- 1
Send your inquiry
Choose options, quantity and requirements. No payment needed.
- 2
Get a factory quote
We confirm price, MOQ and lead time — and compare alternatives.
- 3
Production & inspection
We follow up production and inspect goods before shipment.
- 4
Delivered to your door
Sea, air or express with customs clearance and DDP options.
Frequently asked questions
What is the minimum order quantity for Hot Rolled AISI 4140 4130 Low Carbon Alloy Steel Solid?
The MOQ is 25 tons. Smaller trial orders can sometimes be negotiated — tell us your quantity in the inquiry.
How much does Hot Rolled AISI 4140 4130 Low Carbon Alloy Steel Solid cost?
The listed factory price is US$550.00 per ton, depending on quantity. Your final quote includes our service fee and shipping options.
Can it be customized with my logo or specifications?
Customization depends on the factory and order quantity. Describe what you need and we will confirm options with the manufacturer.
How long does production and shipping take?
Typical production time is 15–45 days depending on quantity. Shipping to the US takes about 5–8 days by express, 8–12 days by air and 25–40 days by sea, with DDP door-to-door delivery available.
How do you check product quality?
We verify the manufacturer before ordering and can perform a pre-shipment inspection (AQL sampling) with a photo report before you pay the balance.
