Spherical ASTM A225 Low Alloy Steel Powder, Grade C

ASTM A225 Low Alloy Steel Spherical Powder, Grade C Product Information -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel Spherical Powder, Grade C Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A225 Low Alloy Steel Powder, Grade C characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A225 Low Alloy Steel Powder, Grade C Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical ASTM A225 Low Alloy Steel Powder, Grade C Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical ASTM A225 Low Alloy Steel Powder, Grade C Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel, Grade C Product Information -:- For detailed product information, please contact sales. -: ## **ASTM A225 Grade C Manganese-Vanadium-Nitrogen High-Strength Alloy Steel for Structural Applications** ### **1. Product Overview** **ASTM A225 Grade C** is a **high-strength manganese-vanadium-nitrogen alloy steel plate** designed for **structural applications requiring superior yield strength and toughness**. Falling under the ASTM A225 specification (*Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium*), Grade C represents the highest strength tier in this series, engineered specifically for **heavy structural members, high-pressure components, and critical welded structures** where both high strength and good weldability are essential. This grade utilizes a sophisticated alloying approach combining **manganese for hardenability, vanadium for precipitation strengthening, and controlled nitrogen** for enhanced grain refinement and strength. Primarily supplied in the **normalized or normalized and tempered condition**, it delivers exceptional strength-to-weight ratios, making it ideal for weight-sensitive applications in construction, transportation, and heavy industry. ### **2. Key International Standards & Specifications** | Standard System | Equivalent Designation | Notes | |-----------------|------------------------|-------| | **ASTM/ASME** | **ASTM A225/A225M Grade C** / **SA-225 Grade C** | Primary ASTM specification | | **European (EN)** | **EN 10025-4: S460N** or **S460NL** | Similar high-strength normalized structural steel | | **Japanese (JIS)** | **JIS G3126 SGV 460** | High-strength steel plates for pressure vessels | | **ISO** | **ISO 4950-3: E460** | High yield strength structural steels | | **Canadian** | **CSA G40.21 460W** | Similar weldable structural steel | | **Classification Societies:** Available with supplementary requirements from ABS, DNV, and LR for marine and offshore structures. | ### **3. Chemical Composition (% by Weight)** | Element | ASTM A225 Grade C Requirements | Metallurgical Purpose | |---------|--------------------------------|------------------------| | **Carbon (C)** | 0.15-0.25% | Balanced for strength and weldability | | **Manganese (Mn)** | 1.10-1.50% | Primary alloying element, enhances hardenability and strength through solid solution | | **Phosphorus (P)** | 0.035% maximum | Impurity control for toughness preservation | | **Sulfur (S)** | 0.040% maximum | Controlled for improved through-thickness properties | | **Silicon (Si)** | 0.15-0.40% | Deoxidizer, contributes to strength | | **Vanadium (V)** | **0.10-0.20%** | Key microalloying element, provides precipitation strengthening via V(C,N) | | **Nitrogen (N)** | **0.015-0.025%** | Controlled addition for enhanced grain refinement and precipitation hardening | | **Aluminum (Al)** | ≥ 0.020% (if specified) | Grain refining agent when required | | **Copper (Cu)** | 0.35% maximum (residual) | - | | **Chromium (Cr)** | 0.25% maximum (residual) | - | | **Nickel (Ni)** | 0.25% maximum (residual) | - | | **Molybdenum (Mo)** | 0.08% maximum (residual) | - | **Key Metallurgical Features:** - **Carbon Equivalent (CE):** Typically 0.40-0.50% (IIW formula) - **Vanadium-Nitrogen Synergy:** Forms fine VN precipitates that inhibit grain growth during hot working and heat treatment - **Normalized Microstructure:** Fine-grained ferrite-pearlite with vanadium carbonitride dispersions - **Hardenability:** Excellent due to Mn-V-N combination, suitable for thick sections ### **4. Mechanical & Physical Properties** #### **4.1 Tensile Properties (Normalized Condition)** | Property | Minimum Requirement | Typical Range | Test Standard | |----------|---------------------|---------------|---------------| | **Yield Strength (0.2% offset)** | **60 ksi (415 MPa)** | 62-70 ksi (425-485 MPa) | ASTM A370 | | **Tensile Strength** | **85-105 ksi (585-725 MPa)** | 90-100 ksi (620-690 MPa) | ASTM A370 | | **Elongation (in 8" gauge)** | **18%** minimum | 20-24% | ASTM A370 | | **Reduction of Area** | Not specified | Typically 50-60% | ASTM A370 | | **Yield-to-Tensile Ratio** | ≤ 0.85 typically | 0.70-0.80 | Important for structural design | #### **4.2 Toughness Properties** | Test Temperature | Charpy V-Notch Minimum | Typical Values | Notes | |------------------|------------------------|----------------|-------| | **+68°F (+20°C)** | 40 ft-lb (54 J) average* | 50-70 ft-lb (68-95 J) | *When impact testing specified | | **-20°F (-29°C)** | 25 ft-lb (34 J) average* | 30-50 ft-lb (41-68 J) | Common low-temperature requirement | | **-50°F (-45°C)** | 15 ft-lb (20 J) average* | 20-40 ft-lb (27-54 J) | For arctic applications | #### **4.3 Physical Properties** | Property | Value | Conditions | |----------|-------|------------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | Room temperature | | **Modulus of Elasticity** | 29,000 ksi (200 GPa) | 20°C (68°F) | | **Shear Modulus** | 11,200 ksi (77 GPa) | 20°C (68°F) | | **Poisson's Ratio** | 0.29 | - | | **Thermal Conductivity** | 46 W/m·K | 20°C (68°F) | | **Specific Heat Capacity** | 480 J/kg·K | 20°C (68°F) | | **Coefficient of Thermal Expansion** | 11.8 × 10⁻⁶/°C | 20-100°C (68-212°F) | | **Electrical Resistivity** | 0.21 μΩ·m | 20°C (68°F) | #### **4.4 Hardness Characteristics** - **Typical Brinell Hardness:** 200-240 HB - **Through-Thickness Variation:** ≤ 30 HB points - **Maximum Recommended:** 250 HB for weldability considerations ### **5. Heat Treatment Requirements** **Standard Delivery Conditions:** 1. **Normalized:** Standard for most applications - Temperature: 1600-1700°F (870-925°C) - Cooling: Still air 2. **Normalized and Tempered:** For thick sections or specific property requirements - Normalizing as above + Tempering: 1100-1200°F (595-650°C) **Microstructural Requirements:** - **Grain Size:** ASTM No. 6 or finer (typically 7-9) - **Microstructure:** Fine ferrite-pearlite with vanadium carbonitride precipitates - **Inclusion Control:** ASTM E45 Method A, maximum severity 2.0 ### **6. Product Applications** #### **6.1 Primary Industries & Applications** | Industry | Specific Applications | Typical Thickness | Key Benefits | |----------|----------------------|-------------------|--------------| | **Construction & Infrastructure** | - Bridge girders and arches
- High-rise building columns
- Crane runway beams
- Transmission towers | 0.5-3 inches (12-75 mm) | High strength-to-weight ratio, fatigue resistance | | **Heavy Equipment** | - Mining shovel booms
- Excavator arms
- Crane booms and jibs
- Heavy transport frames | 0.75-4 inches (19-100 mm) | High yield strength, good weldability | | **Pressure Vessels** | - High-pressure storage tanks
- Reactor vessels
- Heat exchanger shells | 0.5-2.5 inches (12-65 mm) | ASME code compliance, high-temperature capability | | **Marine & Offshore** | - Ship hull structural members
- Offshore platform decks
- Floating crane components | 0.5-2 inches (12-50 mm) | Good toughness, fatigue resistance | | **Transportation** | - Railroad car underframes
- Heavy truck chassis
- Specialized trailer beams | 0.25-1.5 inches (6-38 mm) | Weight reduction, durability | #### **6.2 Special Application Advantages** - **Weight-Sensitive Designs:** Enables lighter structures without compromising strength - **Fatigue-Critical Applications:** Good resistance to cyclic loading - **Low-Temperature Service:** Maintains toughness to -50°F with proper specification - **Heavy Fabrication:** Suitable for complex welded assemblies ### **7. Fabrication Characteristics** #### **7.1 Weldability** **Weldability Rating:** **Good** (with proper procedures) | Parameter | Requirements/Recommendations | |-----------|------------------------------| | **Carbon Equivalent (CE)** | 0.42-0.52% (IIW formula) | | **Preheat Temperature** | 200-300°F (95-150°C) for thickness > 0.75 inch | | **Recommended Processes** | SMAW (E11018), SAW, FCAW, GMAW | | **Interpass Temperature** | ≤ 400°F (205°C) | | **Post-Weld Heat Treatment** | Recommended for thickness > 1.5 inches
Temperature: 1100-1200°F (595-650°C) | #### **7.2 Welding Consumables** - **AWS Classification:** AWS A5.5 E11018 or equivalent - **Strength Matching:** Overmatching consumables (70+ ksi yield) typically used - **Special Considerations:** Low hydrogen practices essential, vanadium matching not required #### **7.3 Forming & Machining** | Operation | Requirements | |-----------|--------------| | **Hot Forming** | 1650-1800°F (900-980°C)
Re-normalization recommended if heated above 1700°F | | **Cold Forming** | Good for moderate bending
Minimum bend radius: 2.5× thickness | | **Machinability** | 60-65% of free-cutting steel
Requires rigid tooling and adequate cooling | | **Cutting** | Plasma, laser, or oxy-fuel all suitable | ### **8. Comparative Analysis** #### **8.1 Within A225 Series Comparison** | Property | Grade A | Grade B | **Grade C** | |----------|---------|---------|-------------| | **Yield Strength (min)** | 50 ksi | 55 ksi | **60 ksi** | | **Tensile Range** | 75-95 ksi | 80-100 ksi | **85-105 ksi** | | **Vanadium Range** | 0.10-0.20% | 0.10-0.20% | **0.10-0.20%** | | **Carbon Range** | 0.15-0.25% | 0.15-0.25% | **0.15-0.25%** | | **Typical Applications** | General structural | Intermediate strength | **High-strength structural** | | **Cost Factor** | Base | +5-8% | **+8-12%** | #### **8.2 Versus Competing High-Strength Grades** | Aspect | A225 Grade C | A572 Grade 65 | A514 Grade H | |--------|-------------|---------------|-------------| | **Alloy System** | Mn-V-N | Columbium-Vanadium | Cr-Mo-B | | **Min Yield Strength** | 60 ksi | 65 ksi | 100 ksi | | **Delivery Condition** | Normalized | As-rolled or normalized | Quenched & tempered | | **Weldability** | **Very Good** | Good | Fair (requires special care) | | **Cost Factor** | 1.0x | 0.9x | 1.5-2.0x | | **Thickness Capacity** | **Up to 4 inches** | Up to 2 inches | Up to 6 inches | ### **9. Technical Advantages** #### **9.1 Key Benefits** 1. **High Strength with Good Toughness:** 60 ksi minimum yield with excellent impact properties 2. **Excellent Weldability:** Low carbon equivalent for its strength level 3. **Thick Section Performance:** Maintains properties through thickness 4. **Cost-Effective Strength:** More economical than Q&T steels of similar strength 5. **Code Recognition:** Accepted by major structural and pressure vessel codes #### **9.2 Special Metallurgical Advantages** - **Precipitation Strengthening:** Vanadium carbonitrides provide stable strengthening - **Grain Refinement:** Controlled nitrogen enhances grain size control - **Heat-Affected Zone Properties:** Good toughness in weld HAZ - **Strain Aging Resistance:** Minimal aging effects due to vanadium stabilization ### **10. Design Considerations** #### **10.1 Optimal Application Areas** - **Heavy structural frameworks** requiring high stiffness - **Crane and lifting equipment** components - **Bridge components** subject to fatigue loading - **High-pressure structural elements** in processing plants #### **10.2 Design Limitations** - **Not recommended** for continuous service above 750°F (400°C) - **Limited corrosion resistance** – requires protection in aggressive environments - **Higher cost** than conventional structural steels (A36, A572 Gr. 50) - **Special fabrication procedures** required for maximum performance ### **11. Quality Assurance** #### **11.1 Standard Testing Requirements** 1. **Chemical Analysis:** Heat and product analysis 2. **Tensile Testing:** One test per plate or 50 tons 3. **Impact Testing:** When specified by purchaser 4. **Ultrasonic Testing:** Optional per ASTM A578 #### **11.2 Special Quality Provisions** - **Through-Thickness Testing:** For plates > 1 inch when specified - **Flatness Requirements:** Special tolerances available - **Surface Quality:** Controlled scale, blasted or pickled finish optional ### **12. Procurement Guidelines** #### **12.1 Specification Requirements** When ordering ASTM A225 Grade C, specify: - Full designation: ASTM A225/A225M Grade C - Delivery condition: Normalized or normalized and tempered - Impact test requirements if needed - Supplementary testing requirements - Dimensional tolerances #### **12.2 Availability & Supply** - **Lead Time:** 6-10 weeks typical - **Standard Thickness:** 0.25 to 4 inches (6 to 100 mm) - **Width/Length:** Standard mill sizes available - **Quantity:** Suitable for both project-specific and stock orders ### **13. Case Studies** #### **13.1 Long-Span Bridge Construction** **Project:** River crossing bridge, 800-ft main span **Application:** Main girders and cross beams **Grade C Advantages:** - Reduced girder depth for given load capacity - Excellent fatigue performance in welded details - Good field weldability for site connections - Met all AASHTO requirements for fracture-critical members #### **13.2 Mining Shovel Boom** **Equipment:** 50-cubic yard electric mining shovel **Application:** Main boom structure **Results:** - Withstood dynamic loading cycles - Good resistance to crack initiation - Successful fabrication with complex welds - Extended service life compared to previous materials ### **14. Industry Trends** #### **14.1 Growing Applications** - **Renewable Energy:** Wind turbine towers and foundations - **Infrastructure Renewal:** Bridge rehabilitation and strengthening - **Logistics:** Heavy material handling equipment - **Construction:** High-performance building structures #### **14.2 Technical Developments** - **Improved Processing:** Enhanced normalizing practices - **Welding Technology:** Advanced procedures for high-strength steels - **Design Methods:** Performance-based design approaches - **Sustainability:** Lifecycle optimization and recyclability ### **15. Conclusion** **ASTM A225 Grade C** represents a **high-performance structural steel** that successfully balances **exceptional strength with good fabricability**. Its manganese-vanadium-nitrogen alloy system provides: **Core Technical Advantages:** 1. **High Strength:** 60 ksi minimum yield strength for efficient designs 2. **Excellent Toughness:** Good impact properties at low temperatures 3. **Superior Weldability:** Favorable carbon equivalent for its strength level 4. **Thick-Section Capability:** Consistent properties through thickness 5. **Code Acceptance:** Recognized by major construction and pressure vessel codes **Ideal Application Scenarios:** - Heavy structural frameworks requiring high strength-to-weight ratios - Dynamically loaded equipment components - Bridge and infrastructure elements - High-pressure structural applications **Critical Success Factors:** - Proper specification of delivery condition and testing requirements - Use of qualified welding procedures - Attention to fabrication details for high-strength materials - Compliance with relevant design codes and standards ASTM A225 Grade C fills an **important niche** between conventional high-strength low-alloy steels and premium quenched and tempered grades. It offers **significant performance advantages** over standard structural steels while remaining more **economical and fabricable** than ultra-high-strength alternatives. For structural engineers and designers seeking a **proven, cost-effective material** for demanding applications requiring **60 ksi yield strength with good toughness and weldability**, Grade C provides a **technically sound solution** backed by decades of successful application experience across multiple industries. Its continued relevance in modern construction and heavy equipment demonstrates its enduring value as a **high-performance structural steel option**. -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel, Grade C Specification Dimensions Size： Diameter 20-1000 mm Length <5979 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel, Grade C Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A225 Low Alloy Steel Powder, Grade C Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A225 Low Alloy Steel Powder, Grade C -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A225 Low Alloy Steel Spherical Powder, Grade C -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A225 Low Alloy Steel Spherical Powder, Grade C -:- For detailed product information, please contact sales. -:

Packing of ASTM A225 Low Alloy Steel Spherical Powder, Grade C -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Spherical Powder drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2450 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition