Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of 23crni3moa alloy structural steel in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
23CrNi3MoA is a low-alloy carburizing steel widely used in heavy-duty engineering applications requiring high surface hardness combined with strong core toughness. With optimized additions of chromium (Cr), nickel (Ni), and molybdenum (Mo), this grade delivers superior fatigue resistance, wear resistance, and impact strength.
Compared with standard carburizing steels, 23CrNi3MoA provides:
Deeper hardening depth
Better load-bearing performance
Enhanced resistance to dynamic stress
It is a preferred material in industries such as automotive, mining, power transmission, and heavy equipment manufacturing.
Chemical Composition (wt%)
| Element | Content (%) |
|---|---|
| C | 0.20 – 0.27 |
| Si | 0.17 – 0.37 |
| Mn | 0.50 – 0.80 |
| Cr | 0.90 – 1.20 |
| Ni | 2.75 – 3.15 |
| Mo | 0.25 – 0.40 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
Specifications & Dimensions
| Product Type | Diameter / Thickness | Length | Standard |
|---|---|---|---|
| Round Bar | 20 – 500 mm (0.79" – 19.7") | 3 – 12 m | GB/T 3077 |
| Forged Bar | 80 – 1000 mm (3.15" – 39.4") | Custom | GB / ASTM |
| Steel Plate | 10 – 200 mm (0.39" – 7.87") | Custom | GB |
| Forgings | Custom sizes | As per drawing | EN / ASTM |
Dimensional Tolerance: According to international standards (ASTM A29 / EN 10060)
Mechanical Properties
| Property | Value |
|---|
| Tensile Strength | ≥ 980 MPa |
| Yield Strength | ≥ 785 MPa |
| Elongation | ≥ 10% |
| Impact Energy | ≥ 55 J |
| Hardness (after quenching & tempering) | 28 – 34 HRC |
Heat Treatment Process
Carburizing Temperature: 900 – 950°C
Quenching: Oil quenching
Tempering: 150 – 200°C
Surface Hardness After Treatment: 58 – 62 HRC
Advantages of Heat Treatment:
High surface wear resistance
Tough and ductile core
Improved fatigue life
Key Features & Advantages
1. Excellent Hardenability
Deep carburizing layer ensures long service life under heavy load.
2. Superior Fatigue Resistance
Ideal for dynamic and cyclic stress environments such as gear systems.
3. High Core Toughness
Nickel content enhances impact resistance and prevents brittle fracture.
4. Wear Resistance
Suitable for components exposed to friction and abrasion.
5. Reliable Performance in Harsh Environments
Performs well in high-load and high-stress industrial conditions.
Applications
23CrNi3MoA alloy steel is widely used in:
Heavy-duty gears and gear shafts
Transmission systems
Mining machinery components
Automotive drivetrain parts
Wind power equipment
Industrial shafts and couplings
Inspection & Quality Assurance
We implement strict quality control systems to ensure every batch meets international standards:
Raw Material Inspection (chemical composition verification)
Ultrasonic Testing (UT) for internal defects
Mechanical Testing (tensile, impact, hardness)
Metallographic Analysis
Third-Party Inspection Available (SGS, BV, TUV)
All products are supplied with Mill Test Certificates (MTC EN 10204 3.1 / 3.2).
Product Delivery Standards
Surface Condition: Black / Peeled / Polished
Packaging: Seaworthy export packing (wooden cases / bundles)
Delivery Time: 7–25 days depending on size and quantity
Export Markets: USA, Europe, Middle East, Southeast Asia
Why Choose Us as Your Supplier?
Direct factory supply with competitive pricing
Full size range and custom forging capability
Fast delivery and stable supply chain
Rich export experience in alloy steels
Technical support for material selection
FAQ
Q1: What is 23CrNi3MoA steel used for?
It is mainly used for high-load carburized components such as gears, shafts, and transmission parts.
Q2: What is the equivalent grade of 23CrNi3MoA?
It is similar to EN 20NiCrMo2-2 or other Ni-Cr-Mo carburizing steels, but exact equivalence may vary by standard.
Q3: What is the hardness after carburizing?
Surface hardness can reach 58–62 HRC, while maintaining a tough core.
Q4: Can you provide customized sizes?
Yes, we support custom forgings, machining, and cutting services.
Q5: Do you provide inspection certificates?
Yes, we provide EN 10204 3.1 / 3.2 certificates and support third-party inspections.
Contact Us
Looking for a reliable 23CrNi3MoA alloy steel supplier?
Contact us today for:
Latest price
Technical consultation
Custom solutions
+8615769214734
office@dongmjd.com
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