Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of 22si2mncrni2moa (ff710) alloy 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.
22Si2MnCrNi2MoA (FF710) is a multi-alloy ultra-high-strength structural steel engineered for applications requiring extreme load-bearing capacity, high impact resistance, and long-term durability under harsh conditions.
By combining silicon (Si), manganese (Mn), chromium (Cr), nickel (Ni), and molybdenum (Mo), this grade achieves:
Exceptional strength-to-weight ratio
Superior hardenability and toughness
Outstanding fatigue resistance under cyclic loading
FF710 is widely used in defense, heavy engineering, mining equipment, and high-performance structural systems, where conventional alloy steels cannot meet performance requirements.
Chemical Composition (wt%)
| Element | Content (%) |
|---|---|
| C | 0.18 – 0.24 |
| Si | 1.50 – 2.00 |
| Mn | 0.80 – 1.20 |
| Cr | 0.80 – 1.20 |
| Ni | 1.50 – 2.00 |
| Mo | 0.30 – 0.50 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
Specifications & Dimensions
| Product Type | Thickness / Diameter | Width / Length | Standard |
|---|---|---|---|
| Steel Plate | 10 – 200 mm (0.39" – 7.87") | Up to 3500 mm | GB / Custom |
| Forgings | 100 – 1200 mm | As per drawing | GB / ASTM |
| Round Bar | 20 – 500 mm (0.79" – 19.7") | 3 – 12 m | GB |
Tolerance: مطابق ASTM / EN international tolerance standards
Surface Condition: Black / Machined / Polished
Mechanical Properties (Typical)
| Property | Value |
|---|
| Tensile Strength | ≥ 1200 MPa |
| Yield Strength | ≥ 900 MPa |
| Elongation | ≥ 10% |
| Impact Toughness | ≥ 60 J |
| Hardness (Q&T) | 32 – 42 HRC |
Heat Treatment Process
Quenching Temperature: 860 – 900°C
Cooling Medium: Oil / Polymer
Tempering Temperature: 200 – 600°C (depending on required properties)
Heat Treatment Advantages:
Uniform microstructure
High strength with retained ductility
Improved resistance to crack propagation
Key Features & Advantages
1. Ultra-High Strength Performance
Designed for extreme load-bearing environments, outperforming conventional structural steels.
2. Excellent Toughness
Nickel and molybdenum enhance low-temperature impact resistance and structural stability.
3. Superior Fatigue Resistance
Ideal for components under cyclic stress and dynamic loading.
4. High Hardenability
Ensures consistent performance across thick sections and large forgings.
5. Good Weldability (with Preheating)
Suitable for structural fabrication when proper welding procedures are followed.
Applications
22Si2MnCrNi2MoA (FF710) is widely used in:
Military armored structures
Heavy-duty mining equipment
High-strength engineering structures
Offshore and energy equipment
Large load-bearing shafts and components
Construction machinery (cranes, excavators)
Inspection & Quality Assurance
We ensure strict compliance with international quality systems:
Chemical composition analysis (spectrometer)
Mechanical property testing (tensile, impact, hardness)
Ultrasonic Testing (UT) for internal integrity
Magnetic Particle Testing (MT)
Metallographic structure inspection
✅ Third-Party Inspection: SGS / BV / TUV available
✅ Certification: EN 10204 3.1 / 3.2 Mill Test Certificate
Product Delivery Standards
Packaging: Export-standard wooden cases / steel bundles
Delivery Time: 10–30 days depending on customization
MOQ: Flexible based on project requirements
Export Regions: North America, Europe, Middle East, Asia
Why Choose Our FF710 Steel?
Stable production with controlled alloy composition
Rich experience in high-strength alloy steels
Custom forging & machining support
Fast response & technical consultation
Competitive pricing for global projects
FAQ – Frequently Asked Questions
Q1: What is FF710 steel equivalent to?
FF710 is a special ultra-high-strength steel; it does not have a direct international equivalent but is comparable to advanced Ni-Cr-Mo structural steels.
Q2: Is 22Si2MnCrNi2MoA suitable for welding?
Yes, but preheating and post-weld heat treatment (PWHT) are recommended due to high alloy content.
Q3: What industries use FF710 steel?
It is mainly used in defense, mining, heavy engineering, and energy sectors.
Q4: Can you supply large-size forgings?
Yes, we support custom heavy forgings up to large diameters and thicknesses.
Q5: What makes FF710 different from standard alloy steels?
Its high silicon + multi-alloy design provides better strength, fatigue resistance, and toughness than traditional grades.
Contact Us
Looking for a reliable 22Si2MnCrNi2MoA (FF710) steel supplier?
We provide:
Custom sizes & forgings
Technical support
Fast global delivery
+8615769214734
office@dongmjd.com
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