AISI 1019 Steel, hot rolled

AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: # **Product Specification: AISI 1019 Low Carbon Steel, Hot-Rolled Round Bar** ## **Product Identification** * **Standard Designation:** AISI 1019 / SAE 1019 * **UNS Number:** G10190 * **Condition:** Hot-Rolled (As-Rolled) * **Product Form:** Round Bar * **Size Range:** 19 mm to 32 mm (0.75 inch to 1.25 inch) diameter * **Surface:** Characteristic mill scale surface * **Key Feature:** Enhanced manganese variant offering improved strength and hardenability over standard grades ## **Overview** AISI 1019 hot-rolled round bar is a strategically engineered low-carbon steel that provides enhanced mechanical properties through optimized manganese content. With carbon levels of 0.15-0.20% and manganese ranging from 0.70-1.00%, this grade delivers approximately **10-15% higher strength** than standard AISI 1018 while maintaining excellent weldability and formability. The hot-rolling process in the 19-32 mm diameter range ensures good material integrity and consistent mechanical properties, making it an economical choice for structural components, forgings, and general fabrication where enhanced performance is required without transitioning to higher-cost alloys. --- ## **1. Chemical Composition (Weight %, AISI/SAE Standard)** | Element | Content (%) | Metallurgical Significance | |---------|-------------|----------------------------| | **Carbon (C)** | 0.15 - 0.20 | Balanced for strength and weldability | | **Manganese (Mn)** | **0.70 - 1.00** | **Key differentiator** - enhances strength and hardenability | | **Phosphorus (P)** | ≤ 0.040 | Impurity control for formability | | **Sulfur (S)** | ≤ 0.050 | Standard impurity level | | **Silicon (Si)** | Typically 0.15-0.35 | Deoxidizer (varies by practice) | | **Iron (Fe)** | Balance | Matrix element | **Grade Positioning Analysis:** - **vs. AISI 1018:** Higher Mn (0.70-1.00% vs. 0.60-0.90%) for improved properties - **vs. AISI 1020:** Similar strength but better weldability and formability - **vs. AISI 1015:** Significantly higher strength and hardenability - **Optimal Application:** Where 1018 is marginally insufficient but alloys are unnecessary --- ## **2. Physical & Mechanical Properties** ### **A. Physical Properties (Hot-Rolled Condition)** - **Density:** 7.87 g/cm³ (0.284 lb/in³) - **Elastic Modulus:** 200 GPa (29,000 ksi) - **Poisson's Ratio:** 0.29 - **Thermal Conductivity:** ~57.5 W/m·K - **Coefficient of Thermal Expansion:** 11.7 × 10⁻⁶ /K (20-100°C) - **Magnetic Properties:** Strongly ferromagnetic - **Specific Heat Capacity:** ~480 J/kg·K ### **B. Mechanical Properties (Typical, As-Hot-Rolled - 25 mm Round)** | Property | Value Range | Comparison Notes | |----------|-------------|------------------| | **Yield Strength (0.2% offset)** | 350 - 460 MPa (51 - 67 ksi) | **~10% higher than AISI 1018** | | **Tensile Strength** | 500 - 620 MPa (73 - 90 ksi) | Enhanced from Mn content | | **Elongation (50 mm)** | 20% - 28% | Maintains good ductility | | **Hardness (Brinell)** | 140 - 180 HB | | | **Reduction of Area** | 40% - 50% | Good formability indicator | | **Impact Toughness (Charpy V)** | 35 - 70 J at 20°C | Improved over lower-Mn grades | | **Machinability Rating** | 70% of 1212 steel | Comparable to 1018/1020 | ### **C. Property Uniformity (19-32 mm Range)** | Diameter | Surface Hardness | Core Hardness | Strength Gradient | |----------|------------------|---------------|-------------------| | **19 mm (0.75 in)** | 150-180 HB | 140-170 HB | Minimal | | **25 mm (1.0 in)** | 145-175 HB | 135-165 HB | Slight | | **32 mm (1.25 in)** | 140-170 HB | 130-160 HB | Moderate | --- ## **3. Product Applications** ### **Structural & Fabrication Components** - **Industrial Equipment:** Machine bases, structural frames, supports requiring enhanced strength - **Construction Applications:** Brackets, hangers, structural members in moderate service - **Agricultural Machinery:** Implement frames, reinforcement components needing durability - **Material Handling:** Conveyor components, storage system structural elements ### **Automotive & Transportation** - **Chassis Components:** Brackets, mounts, reinforcement plates - **Suspension Parts:** Linkage components, bushings, brackets - **Trailer Components:** Structural elements, coupling components - **Off-Road Equipment:** Frames and structural elements ### **General Manufacturing** - **Forging Stock:** Excellent for medium-strength forged components - **Machined Parts:** After descaling, for components requiring moderate strength - **Fastener Stock:** Base material for higher-strength bolts and pins - **Tooling Bases:** For jigs, fixtures requiring better strength than mild steel ### **Special Applications** - **Case Hardening Substrate:** Excellent for carburized parts requiring good core strength - **Shafts & Axles:** Medium-duty applications in 19-32 mm range - **Agricultural Tools:** Components requiring better wear resistance and strength - **Welded Structures:** Where enhanced strength over standard mild steel is beneficial --- ## **4. International Standards & Equivalents** ### **Direct Chemical Equivalents** | Standard System | Designation | C (%) | Mn (%) | Standard Reference | |-----------------|-------------|-------|--------|-------------------| | **AISI/SAE (USA)** | **1019** | 0.15-0.20 | 0.70-1.00 | SAE J403 | | **UNS (USA)** | **G10190** | 0.15-0.20 | 0.70-1.00 | ASTM A29 | | **DIN (Germany)** | **1.0460** | 0.16-0.22 | 0.70-1.00 | DIN 17210 | | **EN (Europe)** | **C19E** | 0.16-0.22 | 0.70-1.00 | EN 10083-2 | | **JIS (Japan)** | **S19C** | 0.15-0.20 | 0.60-0.90 | JIS G4051 | | **GB (China)** | **19** | 0.16-0.22 | 0.70-1.00 | GB/T 699 | | **ISO** | **C19E4** | 0.16-0.22 | 0.70-1.00 | ISO 683-1 | ### **Functional Equivalents (Similar Properties)** | Standard | Grade | Strength Class | Application Context | |----------|-------|---------------|-------------------| | **ASTM A36** | Structural | 250 MPa yield | General structural use | | **EN 10025-2** | S275JR | 275 MPa yield | Structural purposes | | **JIS G3101** | SS400 | 400 MPa tensile | General structural | | **ASTM A575** | Merchant Quality | Commercial | General fabrication | --- ## **5. Processing Characteristics** ### **Fabrication Properties** 1. **Weldability:** Excellent - Carbon Equivalent (CE): ~0.32-0.38 - No preheat required for thickness <25 mm - All common welding processes applicable - Filler metals: E70XX series typical 2. **Machinability:** - Rating: 70% of 1212 steel - Good chip formation compared to lower-carbon steels - Recommended cutting speeds: 30-45 m/min for HSS tools - Surface finish: Good with proper tool geometry 3. **Forming Characteristics:** - Cold bending radius: 1.0 × thickness minimum - Hot forming temperature: 870-1150°C (1600-2100°F) - Minimum bend radius: 0.5 × thickness (with grain) - Formability rating: Good to very good ### **Heat Treatment Response** - **Annealing Temperature:** 790-845°C (1450-1550°F) - **Normalizing Temperature:** 870-925°C (1600-1700°F) - **Forging Temperature:** 1150-900°C (2100-1650°F) - **Carburizing Response:** Excellent due to balanced chemistry - **Hardenability (Jominy):** DI ~20-25 mm in water ### **Surface Preparation** - **Mill Scale Removal:** Required for painting/welding - **Methods:** Abrasive blasting, pickling, machining - **Surface Roughness (as-rolled):** 12.5-25 μm Ra - **Decarburization:** Typically <0.25 mm depth --- ## **6. Quality Specifications** ### **Standard Compliance** - **Dimensional Tolerances:** ASTM A29 Table 7 (Hot-Rolled Rounds) - **Straightness:** Standard mill practice (±1.5 mm/m) - **Surface Quality:** Free of harmful defects per ASTM A6/A6M - **Chemistry Verification:** Heat analysis per ASTM A751 ### **Testing Requirements** | Test | Standard | Frequency | Acceptance Criteria | |------|----------|-----------|-------------------| | **Chemical Analysis** | ASTM A751 | Per heat | Within specified ranges | | **Tensile Test** | ASTM A370 | Per heat/lot | Min. 500 MPa tensile | | **Bend Test** | ASTM E190 | Optional | No cracking at 2t radius | | **Hardness** | ASTM E10 | Optional | 140-180 HB typical | --- ## **7. Technical Comparison Matrix** ### **vs. AISI 1018** | Parameter | AISI 1019 Advantage | Magnitude | |-----------|---------------------|-----------| | **Yield Strength** | Higher | 8-12% increase | | **Tensile Strength** | Higher | 5-10% increase | | **Hardenability** | Better | DI increase ~15% | | **Impact Toughness** | Slightly better | Marginal improvement | | **Cost Difference** | Minimal | 2-5% typically | ### **vs. AISI 1020** | Parameter | AISI 1019 Advantage | Notes | |-----------|---------------------|-------| | **Weldability** | Better | Lower carbon equivalent | | **Cold Formability** | Better | More ductile | | **Machinability** | Comparable | Similar ratings | | **Strength** | Similar | Slight trade-off | ### **Performance Summary** 1. **Strength-to-Cost Ratio:** Excellent 2. **Manufacturing Flexibility:** Superior 3. **Heat Treatment Response:** Very Good 4. **Surface Finish Capability:** Good (after processing) 5. **Global Availability:** Good --- ## **8. Design & Engineering Considerations** ### **Advantages** 1. **Enhanced Properties:** Measurable improvement over standard grades 2. **Cost Effective:** Minimal premium for performance gain 3. **Processing Friendly:** Familiar manufacturing characteristics 4. **Availability:** Widely produced and stocked ### **Limitations** 1. **Maximum Strength:** Limited by low carbon content 2. **Hardness:** Lower than medium-carbon steels 3. **Wear Resistance:** Requires surface treatment for severe service 4. **Temperature Limits:** <400°C continuous service ### **Design Guidelines** - **Minimum Radii:** 2× thickness for bends - **Hole Placement:** Minimum 1.5× diameter from edges - **Welding:** Standard low-carbon steel practices - **Machining:** Standard parameters for low-carbon steel --- ## **9. Economic & Supply Considerations** ### **Cost Structure** | Component | Percentage | Notes | |-----------|------------|-------| | **Base Material** | 85-90% | Hot-rolled premium | | **Processing** | 5-10% | Cutting, testing, etc. | | **Certification** | 2-5% | Testing and documentation | | **Profit Margin** | 3-8% | Industry standard | ### **Supply Chain Factors** - **Lead Times:** 4-6 weeks standard - **Minimum Orders:** 500-1000 kg typical - **Stock Availability:** Common in 19-32 mm range - **Global Sources:** Multiple manufacturers worldwide ### **Total Cost of Ownership** 1. **Material Efficiency:** Good utilization in fabrication 2. **Processing Costs:** Standard low-carbon steel rates 3. **Tooling Costs:** No special requirements 4. **Performance Benefits:** Enhanced service life potential --- ## **10. Packaging & Delivery** ### **Standard Specifications** - **Lengths:** 3-6 meters (10-20 feet) standard - **Bundling:** 1-5 tons per bundle, securely strapped - **Identification:** Color-coded ends or tags - **Surface Protection:** Mill dry or lightly oiled - **Marking:** Heat number, grade, size stenciled ### **Custom Options** - **Pre-cut lengths** to specifications - **Special straightness** requirements - **Testing/Inspection** services - **Third-party certification** --- ## **Summary** **AISI 1019 hot-rolled round bar (19-32 mm) represents an intelligent engineering choice that delivers measurable performance improvements over standard low-carbon steels through optimized manganese content.** With its balanced chemistry of 0.15-0.20% carbon and 0.70-1.00% manganese, this grade provides approximately 10% higher strength than AISI 1018 while maintaining the excellent weldability and formability characteristics that define the 10xx series. **Key Performance Advantages:** 1. **Enhanced Mechanical Properties:** Higher yield and tensile strength 2. **Improved Hardenability:** Better response to heat treatment 3. **Good Toughness:** Maintains impact resistance 4. **Familiar Processing:** Standard low-carbon steel fabrication methods **Ideal Application Scenarios:** - Structural components requiring better strength than mild steel - Parts that may undergo subsequent heat treatment - Fabrications where enhanced properties extend service life - Components where 1018 is marginally insufficient **Economic Value Proposition:** - **Minimal Cost Premium:** Typically 2-5% over 1018 - **Processing Efficiency:** No special handling required - **Supply Chain Reliability:** Widely available globally - **Performance ROI:** Enhanced properties justify slight cost increase **Technical Position:** AISI 1019 effectively bridges the gap between standard mild steel and more expensive alternatives. Its enhanced manganese content provides tangible benefits without the manufacturing challenges of higher-carbon grades. For applications in the 19-32 mm range, it offers optimal performance where section size limitations of through-hardening are not a concern. **Global Standardization:** With direct equivalents in **EN C19E (1.0460)** and **JIS S19C**, this grade offers consistent quality and performance expectations across international supply chains. Its standardization ensures reliable material properties regardless of source. **Selection Guidance:** 1. **Choose 1019 over 1018 when:** Enhanced strength or hardenability is needed 2. **Consider 1019 instead of 1020 when:** Better weldability is important 3. **Evaluate 1019 against alloy steels for:** Cost-sensitive moderate-performance applications 4. **Specify 1019 for:** Components where slight property improvements add value **Final Recommendation:** AISI 1019 hot-rolled round bar represents an excellent value proposition for engineers and fabricators seeking enhanced performance without significant cost increases. Its balanced properties, familiar processing characteristics, and global availability make it a practical choice for a wide range of applications in the 19-32 mm diameter range. When project requirements exceed standard mild steel capabilities but don't justify premium materials, 1019 offers an optimal solution that leverages metallurgical optimization rather than expensive alloying. -:- For detailed product information, please contact sales. -: AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4771 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. -: AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1019 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- 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 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 1242 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