GB/T 3077 40Cr Steel Plate
- Alloy or Not: Alloy
- Thickness: 6 – 250 mm, or as requested
- Width: 900 – 4800 mm, or as requested
- Length: 3000 – 25000 mm, or as requested
- Technique: Hot Rolled, Cold Rolled, Forged
- Condition: +A/+N/+QT/+HR/+CR, or as requested
- Processing Service: Cutting, Turning, Milling, Drilling, Grinding, etc.
- Certification: ISO 9001
- Inspection: SGS, TUV, Factory Inspection
- Origin: Hubei/Henan/Jiangsu, China
- Port: Qingdao, Tianjin, Lianyungang
- MOQ: 5 tons (or as per negotiation)
- Delivery Time: 8-14 Days
- Payment: T/T, L/C
Product Detail
40Cr steel plate is a practical choice in alloy structural steel, known for its chromium content that enhances wear resistance and durability. Compared to lower-carbon grades in its series, 40Cr provides higher strength, making it suitable for gears, shafts, and other medium-strength components. Heat treatment further improves its hardness and impact resistance, meeting the needs of high-strength, wear-resistant parts.
40Cr also offers a good balance of toughness and machinability, making it practical for complex precision parts. Typically treated with quenching and tempering, it achieves a well-rounded performance that withstands considerable pressure and wear, though it is less suited for extreme temperatures or corrosive environments.
If you’re looking for a material that combines strength with economic value, 40Cr is likely a strong fit for your needs.
Contact us if you are not familiar with this product or if you have questions unsolved.
Features
40Cr steel plates could bring the following benefits to your project:
- High Strength & Wear Resistance – Extends equipment life, reduces maintenance.
- Excellent Toughness – Minimizes fracture or deformation risks under heavy load.
- Reliable Hardenability – Ensures uniform hardness, easy heat treatment.
- Efficient Machining – Simplifies processing, cuts costs.
- Versatile Use – Ideal for gears, shafts, and high-strength parts.
Applications
Automotive
Gears, drive shafts, axles, engine components, etc.
Aerospace
Landing gear components, engine parts, structural frames, etc.
Construction
Cranes, hoisting machinery, structural supports, heavy-duty frames, etc.
Oil & Gas
Pipeline components, drill bits, valves, rig structures, etc.
Machinery Manufacturing
Industrial gears, machine tool spindles, wear-resistant parts, etc.
Agriculture
Tractor components, plow parts, mechanical arms, grain elevators, etc.
Product Parameters
| Parameter | Details |
|---|---|
| Standard | GB/T 3077-1999, ASTM A29/A29M, DIN EN 17200, JIS G4053, ISO 683-1, etc. |
| Grade | 40Cr, 5140, 41Cr4, SCr440 |
| Thickness | As requested; 6 – 250 mm; Standard 6/8/10/12/15/20/25/30/40/50 mm |
| Width | As requested; 900 – 4800 mm; Standard 1000/1200/1500/2000 mm |
| Length | As requested; 3000～25000 mm; Standard 2000/2500/3000/4000/6000 mm |
| Thickness Tolerance | ±1%; or as requested |
| Surface Treatment | Chrome-Plated, Nickel-Plated, Nitrided, Carburized, Black Oxide Coated, Phosphated, etc. |
| Condition of Delivery | +A/+N/+QT/+HR/+CR, or as requested |
| Testing Method | CCA, HB/HRC/HV, NDT, TST, ITT, etc. |
| Application | Gears, drive shafts, axles, shafts, industrial gears, machine tool spindles, structural supports, heavy-duty frames, crankshafts, bolts, connecting rods, wear-resistant parts, transmission parts, hydraulic cylinder rods, etc. |
| Certification | Approved by ISO 9001 |
| Packaging | Standard seaworthy packing, or as requested |
*Condition of Delivery: A – Annealed, N – Normalized, QT – Quenched & Tempered, HR – Hot Rolled, CR – Cold Rolled
*Testing Method: CCA – Chemical Composition Analysis, HB/HRC/HV – Hardness Testing (Brinell, Rockwell, Vickers), NDT – Non-Destructive Testing, TST – Tensile Strength Testing, ITT – Impact Toughness Testing
Material Specifications
Chemical Composition
| Component | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
|---|---|---|---|---|---|---|---|---|---|
| Wt% | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | 0.80-1.10 | ≤0.30 | ≤0.30 | ≤0.15 |
*According to GB/T 3077-1999.
Mechanical Properties
| Thickness Range (mm) | Heat Treatment Condition | Tensile Strength (σb, MPa) | Yield Strength (σs, MPa) | Elongation After Fracture (δ, %) | Area Reduction (ψ, %) | Hardness (HBW) | Impact Absorption Energy (KV2, J) |
|---|---|---|---|---|---|---|---|
| ≤80 | Quenched + Tempered | ≥980 | ≥785 | ≥9 | ≥45 | ≤207 | ≥47 |
| 80-100 | Quenched + Tempered | ≥980 | ≥785 | ≥8 | ≥40 | ≤207 | ≥44.65 (5% reduction) |
| 100-150 | Quenched + Tempered | ≥980 | ≥785 | ≥7 | ≥35 | ≤207 | ≥42.30 (10% reduction) |
| 150-250 | Quenched + Tempered | ≥980 | ≥785 | ≥6 | ≥30 | ≤207 | ≥39.95 (15% reduction) |
*According to GB/T 3077-1999.
*Heat Treatment Temperature: Quenching ±15°C, low-temperature tempering ±20°C, high-temperature tempering ±50°C.
*Tensile Test: If no yield point is observed in the tensile test specimen, and the yield strength (σs) cannot be determined, measure specified residual elongation stress (στ0.2).
*Hardness: Values in the table refer to Brinell hardness (HB10/3000) in the annealed or high-temperature tempered state.
*Recommended Heat Treatment: Quenching at 850°C (oil cooling); tempering at 520°C (water or oil cooling).
Why Choose Us
Consistent Quality
Common issues you may concern, such as surface defects, uneven hardness, and internal stress, can affect performance. We employ methods such as improved heat treatment, sandblasting, and acid pickling to ensure a flawless surface; optimized uniform heat treatment and annealing for consistent hardness; and controlled slow cooling, segmented cooling, and low-temperature tempering to release internal stress.
Precise Dimensions
We guarantee the dimensional accuracy of our 40Cr plates in accordance with international standards. We can maintain tight tolerances up to ±0.01 mm through precision equipment and ISO 9001-certified processes. Every batch undergoes 100% inspection, with zero deviation complaints in the past 5 years. We ensure smooth project execution without installation delays.
Stable Supply
We have 3 self-operating factories with a combined annual capacity of over 500,000 tons. In the event of any unforeseen circumstances, we can coordinate across factories to ensure stable production and on-time delivery.
Stable & Competitive Pricing
We maintain upstream raw material suppliers with price-lock agreements in place to effectively manage material cost fluctuations. Also, considering that our clients may face pressure from market changes, we will try our best to offer reasonable discounts to both new and existing clients.
Secure Packaging & Shipping
Packaging can be customized according to your requirements. We provide transparent, real-time photos of the packaging and loading process for your verification. You can also choose your trusted freight forwarder for transportation to ensure the entire logistics process is secure and reliable.
About Us
Founded in 1999, SteelPRO Group operates three factories with a combined annual production capacity of over 500,000 tons. We specialize in manufacturing a wide range of steel products, including round steel, profiles, plates, and pipes. Our portfolio encompasses low-alloy structural steel, tool steel, special steel, and more.
With strict adherence to global standards such as GB, ASTM, DIN, EN, and JIS, we ensure high-quality products, including heat-treated, machined, and prestressed steel. Our solutions are trusted by customers in diverse industries, and we proudly export to different countries across Europe, North America, and Asia.
At SteelPRO, we are dedicated to delivering tailored steel solutions and growing alongside our dear clients.
Certification
FAQ
What are your prices?
Our prices are subject to change depending on supply and market conditions. For an accurate and up-to-date quote, please contact our sales team directly.
Can you provide relevant documentation?
Yes, we can provide a wide range of documentation, including Certificates of Analysis/Conformance, Insurance, Certificates of Origin, and any other required export documents.
What is the average lead time?
As per mass production, the lead time is 5-20 days after:
1) we have received your deposit; 2) we have received your final confirmation on your orders.
If our lead time doesn’t meet your deadlines, please contact our sales directly in advance in case of any potential issues. We will try to accommodate your needs in all cases, and we are able to do so in most cases.
Can you provide free samples?
Yes, we can provide free samples for quality evaluation. However, shipping costs are generally covered by your company.
Can I visit your factory?
Of course! You are welcome to visit our factory. Please contact us in advance to arrange a convenient time for your visit, and we will gladly organize a tour and provide any necessary information to ensure a productive visit.
Our Service
SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!
Our Quality Control
- Roundness
- Tolerance
- Microstructure
- Non-Destructive Testing
- Destructive Testing
- Process Control
Service Integration Processing
- Welding
- Metal Fabrication
- CNC Machining
- Lathe
- Forming
