Spherical ASTM A517 Low Alloy Steel Powder, Grade B

ASTM A517 Low Alloy Steel Spherical Powder, Grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel Spherical Powder, Grade B Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A517 Low Alloy Steel Powder, Grade B characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A517 Low Alloy Steel Powder, Grade B 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 A517 Low Alloy Steel Powder, Grade B 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 A517 Low Alloy Steel Powder, Grade B Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel, Grade B Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A517 Grade B Quenched & Tempered High-Strength Alloy Steel Plate** **ASTM A517 Grade B** is a premium **high-strength, quenched and tempered (Q&T) low-alloy steel plate** offering a minimum yield strength of **100 ksi (690 MPa)** with enhanced properties compared to Grade A. As part of the A517 specification (commonly called "T-1" type steels), Grade B represents a refined chemistry variant specifically formulated to provide **improved toughness and hardenability characteristics**. This grade maintains the foundational 100 ksi yield strength while optimizing alloy balance for demanding applications where maximum reliability and performance consistency are required. --- ## **1. Key International Standards & Specifications** * **Primary Standard:** **ASTM A517/A517M** - Standard Specification for Pressure Vessel Plates, Alloy Steel, High-Strength, Quenched and Tempered * **Alternative Designation:** **ASTM A514 Grade B** - Essentially identical specification * **ASME Code Adoption:** **SA-517 Grade B** in ASME Boiler and Pressure Vessel Code, Section II, Part A * **Industry Terminology:** **"T-1 Type B"** or **"Improved T-1"** * **Military Specifications:** Often exceeds **MIL-S-23284** requirements * **International Equivalents:** * **EN 10025-6:** S690QL, S690QL1 (similar strength with enhanced toughness) * **ISO 4950-3:** High yield strength flat steel products - Quenched and tempered steels * **JIS G3124:** SHT690 (Japanese high tensile strength steel) * **GB/T 16270:** Q690D/E (Chinese high strength structural steels) --- ## **2. Chemical Composition (Weight %)** | Element | Composition Range (%) | Metallurgical Function & Grade B Specifics | |---------|----------------------|--------------------------------------------| | Carbon (C) | 0.10-0.20 | Controlled for optimal weldability-toughness balance | | Manganese (Mn) | 0.70-1.00 | Slightly higher than Grade A for improved hardenability | | Phosphorus (P) | 0.035 max | Stringently controlled for maximum toughness | | Sulfur (S) | 0.040 max | Controlled with inclusion shape modification | | Silicon (Si) | 0.15-0.35 | Deoxidizer, solid solution strengthener | | Chromium (Cr) | 0.40-0.80 | Enhanced range for improved hardenability and tempering resistance | | Molybdenum (Mo) | 0.15-0.25 | Provides high-temperature strength, reduces temper embrittlement | | Vanadium (V) | 0.03-0.08 | Grain refinement, precipitation strengthening | | **Boron (B)** | **0.001-0.005** | **Critical:** Maximizes hardenability at minimal addition | | **Nickel (Ni)** | **0.20-0.40** | **Grade B Differentiator:** Improves low-temperature toughness | | Copper (Cu) | ≤0.35 (typical) | May be present; improves atmospheric corrosion resistance | ### **Carbon Equivalent Analysis:** - **IIW Formula:** CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 ≈ **0.48-0.62** - **Pcm Formula:** C + Si/30 + (Mn+Cu+Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B ≈ **0.22-0.32** - **Weldability Classification:** Good with proper procedures (similar to Grade A) ### **Key Composition Features (vs. Grade A):** 1. **Nickel Addition:** Primary differentiator (0.20-0.40% Ni) for improved toughness 2. **Enhanced Manganese:** Higher maximum (1.00% vs 0.85% typical for Grade A) 3. **Optimized Chromium:** Wider range (0.40-0.80%) for processing flexibility 4. **Boron Control:** Similar critical range for hardenability enhancement 5. **Cleaner Steel:** Often produced with enhanced cleanliness requirements ### **Grade B vs. Grade A Composition Comparison:** | Element | Grade B Advantage | Purpose | |---------|-------------------|---------| | **Nickel** | Added (0.20-0.40%) | Improves toughness, reduces ductile-brittle transition temperature | | **Manganese** | Higher maximum (1.00%) | Enhanced hardenability and strength | | **Chromium** | Wider range (0.40-0.80%) | Processing flexibility while maintaining properties | --- ## **3. Mechanical & Physical Properties** ### **Minimum Mechanical Properties (Up to 2.5 in / 63.5 mm thick):** - **Tensile Strength:** **760-895 MPa** (110,000-130,000 psi) - **Yield Strength (0.2% offset):** **690 MPa minimum** (100,000 psi minimum) - **Elongation in 2 in. (50 mm):** **16% minimum** - **Reduction of Area:** Typically 45-60% (improved over Grade A) - **Hardness Range:** 235-293 HB (Brinell) ### **Enhanced Impact Toughness (Grade B Advantage):** - **Charpy V-Notch Testing:** Mandatory with potentially enhanced requirements - **Standard Test Temperature:** **-29°C (-20°F)** or lower (improved over Grade A's -18°C) - **Minimum Absorbed Energy:** **34 J (25 ft-lb)** minimum average, often higher in practice - **Individual Specimens:** Typically no single value < 27 J (20 ft-lb) ### **Thickness-Dependent Properties:** | Thickness Range | Minimum Yield Strength | Impact Performance | Grade B Advantage | |-----------------|------------------------|-------------------|------------------| | ≤ 1.5 in (38 mm) | 690 MPa (100 ksi) | Excellent at -29°C | Maintains toughness better than Grade A | | 1.5-2.5 in (38-63.5 mm) | 690 MPa (100 ksi) | Good at -29°C | Better through-thickness properties | | 2.5-4.0 in (63.5-102 mm) | 620 MPa (90 ksi) | Reduced but adequate | Improved over Grade A in thick sections | | > 4.0 in (>102 mm) | Consult manufacturer | Special requirements | Enhanced processing capability | ### **Physical Properties:** | Property | Value | Notes | |----------|-------|-------| | Density | 7.85 g/cm³ (0.284 lb/in³) | Similar to other steels | | Modulus of Elasticity | 200 GPa (29×10⁶ psi) | Room temperature | | Shear Modulus | 77 GPa (11.2×10⁶ psi) | Room temperature | | Poisson's Ratio | 0.29 | - | | Coefficient of Thermal Expansion | 11.8×10⁻⁶/°C | 20-100°C | | Thermal Conductivity | 41-45 W/m·K | 100°C (slightly lower than Grade A due to Ni) | | Specific Heat | 460-480 J/kg·K | 100°C | | Electrical Resistivity | 0.26-0.31 μΩ·m | Room temperature (slightly higher than Grade A) | --- ## **4. Heat Treatment & Microstructure** ### **Heat Treatment Sequence:** 1. **Austenitizing:** 900-955°C (1650-1750°F) with precise control 2. **Quenching:** Accelerated cooling (water or aggressive polymer quench) 3. **Tempering:** 595-690°C (1100-1275°F) - critical for toughness development 4. **Cooling:** Controlled air cooling after tempering ### **Grade B Specific Processing Advantages:** - **Wider Processing Window:** Nickel addition increases hardenability and allows more flexibility - **Improved Temper Response:** Better toughness development during tempering - **Reduced Sensitivity:** Less sensitive to minor variations in heat treatment ### **Microstructural Characteristics:** - **Primary Phase:** Tempered martensite with possible lower bainite - **Carbide Distribution:** Fine, uniformly dispersed alloy carbides - **Grain Size:** ASTM 7 or finer (≤15 μm prior austenite grain size) - **Prior Austenite Grain:** Controlled through optimal processing - **Microcleanliness:** Typically superior to Grade A due to enhanced production controls ### **Through-Thickness Properties:** - **Superior Hardenability:** Nickel enhances through-thickness hardening - **Property Uniformity:** Excellent in properly processed material - **Reduced Gradient:** Minimal property variation from surface to center in thick sections --- ## **5. Key Characteristics & Advantages** ### **Enhanced Toughness (Primary Advantage over Grade A):** - **Improved Low-Temperature Toughness:** Better Charpy values at reduced temperatures - **Lower Ductile-Brittle Transition:** Transition temperature typically 10-20°C lower than Grade A - **Superior Fracture Resistance:** Enhanced resistance to crack initiation and propagation - **Consistent Impact Properties:** More reliable toughness across production heats ### **Maintained High Strength:** - **100 ksi Yield Strength:** Same minimum as Grade A - **Good Strength Uniformity:** Consistent properties through thickness - **High Strength-to-Weight Ratio:** Enables significant weight reduction ### **Fabrication Advantages:** - **Good Weldability:** Similar to Grade A with proper procedures - **Improved HAZ Toughness:** Heat-affected zone maintains better properties - **Reduced Sensitivity:** Less prone to processing variations affecting properties - **Established Procedures:** Well-documented fabrication guidelines ### **Performance Reliability:** - **Consistent Properties:** Batch-to-batch consistency - **Proven Service History:** Extensive use in critical applications - **Code Acceptance:** Fully approved for demanding applications - **Quality Assurance:** Enhanced production controls ### **Economic Considerations:** - **Slight Cost Premium:** 5-15% over Grade A typically - **Value Justification:** Enhanced reliability often justifies cost difference - **Lifecycle Benefits:** Reduced risk of failure in critical applications - **Insurance Advantages:** Often preferred for high-liability applications --- ## **6. Product Applications** ### **Critical Construction & Mining Equipment:** - **Crane Boom Components:** Especially for heavy-lift cranes - **Excavator Structural Members:** Arms, booms, linkages - **Mining Shovel Components:** Critical structural elements - **Drilling Rig Structures:** For demanding applications ### **Transportation & Heavy Equipment:** - **Specialized Truck Frames:** For extreme heavy haul applications - **Railroad Components:** Couplers, yokes for heavy service - **Trailer Structural Members:** High-stress components ### **Energy & Industrial Applications:** - **Wind Turbine Components:** Particularly in demanding environments - **Hydroelectric Equipment:** Critical gate structures - **Heavy Machinery:** Press frames, roller components ### **Defense & Aerospace:** - **Military Vehicle Components:** Structural elements requiring high reliability - **Weapon System Mounts:** Where failure is not an option - **Specialized Handling Equipment:** For critical loads ### **Pressure Vessels & Special Structures:** - **High-Pressure Containment:** Where enhanced reliability is required - **Critical Process Equipment:** In chemical and petrochemical industries - **Specialized Storage:** For hazardous materials ### **Applications Justifying Grade B over Grade A:** 1. **Lower Temperature Service:** Where improved toughness at reduced temperatures is needed 2. **Critical Structural Elements:** Where failure would have severe consequences 3. **Thick Sections:** Where through-thickness properties are paramount 4. **High-Cycle Fatigue Applications:** Where improved toughness enhances fatigue life 5. **Offshore/Marine Environments:** Where corrosion fatigue is a concern --- ## **7. Fabrication Guidelines** ### **Welding Procedures:** #### **Preheat Requirements:** | Thickness Range | Minimum Preheat | Recommended Range | Grade B Considerations | |-----------------|-----------------|-------------------|------------------------| | ≤ ¾ in (19 mm) | 150°C (300°F) | 150-200°C (300-400°F) | Similar to Grade A | | ¾ to 1½ in (19-38 mm) | 175°C (350°F) | 175-225°C (350-440°F) | May allow slightly lower preheat | | 1½ to 2½ in (38-63.5 mm) | 200°C (400°F) | 200-250°C (400-480°F) | Improved HAZ toughness | | > 2½ in (>63.5 mm) | 225°C (440°F) | 225-275°C (440-530°F) | Better tolerance to variations | #### **Interpass Temperature Control:** - **Maximum Interpass:** 250°C (480°F) - **Optimal Range:** 150-230°C (300-450°F) - **Grade B Advantage:** Slightly more forgiving than Grade A #### **Filler Metal Selection:** - **SMAW:** E11018, E12018, or E11018M for maximum toughness - **FCAW:** E111T1-K3, E121T1-K3 with appropriate shielding - **SAW:** F12A8-EL12, F13A2-EM12K with neutral to basic fluxes - **GMAW:** ER110S, ER120S with Ar-CO₂ mixtures - **For Maximum Toughness:** E8018-C3 or similar Ni-bearing electrodes #### **Post-Weld Heat Treatment (PWHT):** - **Generally Not Required:** For most applications with proper procedures - **Optional Stress Relief:** 595-650°C (1100-1200°F) for highly restrained joints - **Critical:** PWHT temperature must not exceed original tempering temperature ### **Cutting & Machining:** - **Plasma Cutting:** Preferred method - **Oxy-Fuel Cutting:** Requires controlled procedures - **Machining:** Carbide tools recommended; similar to Grade A ### **Forming Operations:** - **Cold Forming:** Limited; similar to Grade A - **Hot Forming:** 870-925°C (1600-1700°F) recommended - **Springback:** Significant due to high strength --- ## **8. Design Considerations** ### **Structural Design:** - **Allowable Stresses:** Typically 0.60 × yield strength (414 MPa / 60 ksi) - **Fatigue Design:** Improved over Grade A due to better toughness - **Fracture Mechanics:** Enhanced fracture toughness allows more aggressive designs - **Connection Design:** Similar to Grade A ### **Temperature Considerations:** - **Minimum Service Temperature:** Can be as low as **-50°C (-58°F)** with proper specification - **Maximum Service Temperature:** ~400°C (750°F) for intermittent service - **Creep Considerations:** Not suitable for sustained loading above 370°C (700°F) ### **Fracture Mechanics Advantages:** - **Higher KIC Values:** Improved fracture toughness - **Lower NDT Temperature:** Reduced nil-ductility transition temperature - **Better Crack Arrest:** Enhanced resistance to crack propagation - **Improved Fatigue Crack Growth:** Slower crack growth rates ### **Economic Justification for Grade B Selection:** 1. **Reduced Inspection Requirements:** Better inherent reliability may reduce NDT 2. **Extended Service Life:** Improved toughness may extend fatigue life 3. **Reduced Risk Premium:** Lower probability of failure in critical applications 4. **Insurance Benefits:** Often results in lower insurance premiums --- ## **9. Comparison with Other Grades** ### **Grade B vs. Grade A (A517/A514):** | Parameter | Grade B | Grade A | Grade B Advantages | |-----------|---------|---------|-------------------| | **Nickel Content** | 0.20-0.40% | Not specified | Primary toughness enhancer | | **Low-Temp Toughness** | Superior | Good | Better for cold climate applications | | **Typical Impact Test Temp** | -29°C (-20°F) or lower | -18°C (0°F) typical | Better low-temperature performance | | **Cost Premium** | 5-15% higher | Baseline | Justified by enhanced properties | | **Applications** | Critical, low-temperature | General high-strength | Grade B for demanding conditions | ### **Grade B vs. European S690QL1:** | Aspect | A517 Grade B | S690QL1 (EN 10025-6) | Comparison | |--------|--------------|----------------------|------------| | **Yield Strength** | 690 MPa | 690 MPa | Same | | **Toughness Temperature** | -29°C typical | -60°C standard | S690QL1 better for extreme cold | | **Chemistry Approach** | B-added with Ni | Higher Mn, Ni, Mo, V, Ti, Nb | Different metallurgical philosophy | | **Thickness Capability** | Up to 63.5 mm full | Up to 100 mm full | S690QL1 better for thick sections | | **Regional Preference** | North America | Europe | Market dictates choice | ### **Grade B vs. A517 Grade F:** | Consideration | Grade B | Grade F (Typical) | Selection Guide | |---------------|---------|-------------------|-----------------| | **Yield Strength** | 690 MPa | 690 MPa | Same | | **Toughness** | Very good | Excellent | Grade F for most critical | | **Chemistry** | B + Ni | Often higher Ni, special processing | Grade F more specialized | | **Availability** | Good | Limited | Grade B more readily available | | **Cost** | Moderate premium | Higher premium | Grade B more economical | ### **Grade B vs. HSLA Steels (A572 Grade 50):** | Factor | A517 Grade B | A572 Grade 50 | Application Differences | |--------|--------------|---------------|------------------------| | **Yield Strength** | 690 MPa | 345 MPa | Grade B 100% stronger | | **Weight Savings** | Up to 50% possible | Baseline | Grade B enables lighter designs | | **Fabrication** | More complex | Straightforward | A572 easier to work with | | **Cost per kg** | 3-4× higher | Baseline | A572 more economical | | **Best For** | Critical weight-sensitive | General structural | Different performance needs | --- ## **10. Quality Control & Certification** ### **Enhanced Testing Requirements:** | Test | Method | Grade B Requirements | Frequency | |------|--------|----------------------|-----------| | **Chemical Analysis** | ASTM E415 | Full including Ni content | Per heat | | **Tensile Testing** | ASTM A370 | Longitudinal and transverse | Per heat treatment charge | | **Charpy V-Notch** | ASTM A370 | At specified low temperature | Per heat treatment charge | | **Hardness Survey** | ASTM E10/E18 | Across width and through thickness | Per plate or lot | | **Ultrasonic Testing** | ASTM A578 | Often required | Per plate for critical applications | ### **Special Requirements for Grade B:** 1. **Nickel Verification:** Must confirm 0.20-0.40% Ni content 2. **Enhanced Impact Testing:** Often at lower temperatures than Grade A 3. **Microcleanliness:** Stringent inclusion control often specified 4. **Grain Size Verification:** ASTM 7 or finer typically required ### **Certification & Documentation:** - **Comprehensive MTC:** Including all mechanical tests at specified temperatures - **Heat Treatment Records:** Complete time-temperature documentation - **Impact Test Reports:** Full Charpy data including temperature and energy values - **Traceability:** Complete from melt to finished product - **Third-Party Verification:** Common for critical applications ### **Industry Acceptance:** - **ASME Code:** Fully approved for Section VIII construction - **API Standards:** Accepted with proper documentation - **Major Engineering Firms:** Typically approved for critical applications - **International Projects:** May require additional testing to local standards --- **Technical Summary:** ASTM A517 Grade B represents an enhanced version of the 100 ksi yield strength quenched and tempered alloy steel, offering improved toughness and reliability compared to Grade A through controlled nickel addition (0.20-0.40%). This grade provides designers with a material option that maintains the significant weight-saving advantages of 100 ksi yield strength while offering better performance in demanding conditions, particularly at reduced temperatures or in critical applications where enhanced fracture resistance is required. The nickel addition improves both the base metal toughness and the heat-affected zone properties after welding, making Grade B particularly suitable for applications where welding is extensive or where service conditions are severe. While commanding a modest price premium over Grade A, Grade B offers excellent value for applications where its enhanced properties can be fully utilized or where the consequences of material failure would be particularly severe. The material finds optimal application in critical structural components for construction equipment, heavy transportation, energy infrastructure, and specialized pressure vessels where the combination of high strength, good toughness, and proven reliability is essential. Proper specification should include appropriate impact testing requirements to ensure the material meets specific application needs, particularly for low-temperature service. -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel, Grade B Specification Dimensions Size： Diameter 20-1000 mm Length <6025 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 A517 Low Alloy Steel, Grade B Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A517 Low Alloy Steel Powder, Grade B Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A517 Low Alloy Steel Powder, Grade B -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A517 Low Alloy Steel Spherical Powder, Grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A517 Low Alloy Steel Spherical Powder, Grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A517 Low Alloy Steel Spherical Powder, Grade B -:- 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 2496 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