AISI 1030 Steel, hot rolled

AISI 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: # **Product Specification: AISI 1030 Steel Round Bar** ## **Condition: Hot Rolled (As-Rolled)** ## **Size Range: 19-32 mm (0.75-1.25 in) Diameter** --- ### **1. Product Overview** This specification covers **hot rolled round bars** of AISI 1030 medium-carbon steel in the diameter range of **19-32 mm (0.75-1.25 inches)** supplied in the **as-rolled condition**. The material undergoes traditional hot rolling above the recrystallization temperature, typically finishing at 870-925°C (1600-1700°F), followed by natural air cooling. This economical production method yields bars with a characteristic mill scale surface, good dimensional consistency, and mechanical properties suitable for a wide range of general engineering applications. The specified diameter range represents one of the most commonly used sizes for shafting, fasteners, and general machine components. --- ### **2. Chemical Composition (% by Weight)** | Element | Standard Specification | Typical Production Range | |---------|----------------------|--------------------------| | **Carbon (C)** | 0.28 - 0.34 | 0.30 - 0.33 | | **Manganese (Mn)** | 0.60 - 0.90 | 0.70 - 0.85 | | **Phosphorus (P)** | ≤ 0.040 | 0.015 - 0.025 | | **Sulfur (S)** | ≤ 0.050 | 0.020 - 0.035 | | **Silicon (Si)** | 0.15 - 0.30 | 0.20 - 0.25 | | **Iron (Fe)** | Balance | Balance | *Note: Actual ladle analysis provided with Mill Test Certificate (MTC).* --- ### **3. Physical & Mechanical Properties (As-Rolled Condition)** #### **A. Guaranteed Mechanical Properties** *Based on test specimens taken from representative material in this size range.* | Property | Imperial Units | Metric Units | Test Standard | |----------|----------------|--------------|---------------| | **Tensile Strength, min** | 65 ksi | 450 MPa | ASTM E8 / ISO 6892-1 | | **Yield Strength (Rp0.2), min** | 40 ksi | 275 MPa | ASTM E8 / ISO 6892-1 | | **Elongation in 2", min** | 25% | 25% | ASTM E8 / ISO 6892-1 | | **Reduction of Area, min** | 45% | 45% | ASTM E8 / ISO 6892-1 | | **Brinell Hardness Range** | 145 - 180 HBW | 145 - 180 HBW | ASTM E10 | #### **B. Typical Mechanical Properties** *Average values for 19-32 mm hot rolled rounds:* | Property | 19 mm (0.75") | 25 mm (1.0") | 32 mm (1.25") | |----------|---------------|--------------|---------------| | **Tensile Strength** | 68-73 ksi / 470-505 MPa | 66-71 ksi / 455-490 MPa | 65-70 ksi / 450-485 MPa | | **Yield Strength** | 42-48 ksi / 290-330 MPa | 41-46 ksi / 285-315 MPa | 40-45 ksi / 275-310 MPa | | **Elongation** | 26-32% | 25-30% | 24-28% | | **Hardness (HBW)** | 155-175 | 150-170 | 145-165 | #### **C. Physical Properties** | Property | Value | Unit | |----------|-------|------| | **Density** | 7.85 | g/cm³ | | **Thermal Conductivity (100°C)** | 50.5 | W/m·K | | **Modulus of Elasticity** | 29,000 ksi / 200 GPa | - | | **Poisson's Ratio** | 0.29 | - | | **Coefficient of Thermal Expansion** | 11.6 | ×10⁻⁶/°C (20-100°C) | --- ### **4. Processing Characteristics** #### **A. As-Supplied Condition** - **Surface Finish:** Characteristic blue/black mill scale (Fe₃O₄) - **Surface Roughness (Ra):** 12.5 - 25 µm (500 - 1000 µin) - **Decarburization:** ≤ 0.25 mm total depth - **Dimensional Tolerance:** Standard hot rolled tolerance (±0.4 mm for 19-32 mm dia.) - **Straightness:** Standard mill tolerance (approximately 1 mm per 300 mm length) #### **B. Machinability** - **Rating:** 60-65% (relative to AISI 1212 steel as 100%) - **Condition:** Good machinability in as-rolled state - **Recommended Cutting Speed:** 30-45 m/min (100-150 SFM) for turning with HSS tools - **Feed Rate:** 0.15-0.25 mm/rev (0.006-0.010 in/rev) - **Chip Formation:** Continuous chips requiring proper chip breakers #### **C. Weldability** - **Rating:** Fair to Good (with precautions) - **Pre-heat Recommended:** For sections > 12 mm thickness - **Post-Weld:** Stress relief recommended for critical applications - **Filler Metals:** E7018, ER70S-6 or equivalent #### **D. Heat Treatment Response** - **Normalizing:** Recommended for improved uniformity (925°C/1700°F, air cool) - **Annealing:** For maximum softness (845°C/1550°F, furnace cool) - **Hardenability:** Suitable for surface hardening (induction/flame) or through-hardening of smaller diameters - **Case Hardening:** Excellent candidate for carburizing --- ### **5. Microstructural Characteristics** - **Primary Structure:** Ferrite-pearlite banding typical of as-rolled condition - **Grain Size:** ASTM 5-7 (may show elongated grains in rolling direction) - **Decarburization:** Surface ferrite layer < 0.3 mm typical - **Inclusions:** ASTM E45 Method A, Series A & B ≤ 2.0 --- ### **6. Product Applications** #### **General Manufacturing & Machinery** - **Power Transmission:** Intermediate shafts, line shafts, drive shafts - **Fastener Stock:** High-strength bolts, studs, pins (M12-M30) - **Agricultural Equipment:** PTO shafts, implement pins, linkage components - **Material Handling:** Conveyor rollers, axle shafts, lifting eye bolts #### **Automotive & Transportation** - **Chassis Components:** Suspension pins, steering linkage parts - **Engine Components:** Non-critical brackets, mounts, accessory shafts - **Brake Systems:** Caliper pins, adjuster mechanisms #### **Construction & Industrial** - **Heavy Equipment:** Bucket pins, hinge bolts, wear component bases - **Tooling:** Drill bushings, jig components, fixture bases - **Structural:** High-strength tie rods, anchor bolts, connection pins #### **Consumer & Commercial Products** - **Hand Tools:** Wrench blanks, pry bar stock, hammer heads - **Fitness Equipment:** Weight bar stock, machine components - **Commercial Hardware:** Heavy-duty hinges, brackets, supports --- ### **7. International Standards Compliance** | Standard System | Standard Number | Grade Designation | Condition | |-----------------|----------------|-------------------|-----------| | **AISI/SAE** | - | 1030 | Hot Rolled | | **ASTM** | A29/A29M | Grade 1030 | As-Rolled | | **ASTM** | A576 | Grade 1030 | Hot Rolled | | **UNS** | - | G10300 | - | | **ISO** | 683-18 | 1.0528 | As-rolled | | **EN** | 10083-2 | C30 (1.0528) | +U (Untreated) | | **DIN** | 17200 | C30 | Warmgewalzt | | **JIS** | G4051 | S30C | As-rolled | | **BS** | 970-1 | 060A30 | Condition A (As-rolled) | | **GB** | GB/T 699 | 30 | Hot Rolled | | **AS/NZS** | 3678 | 250 | As-rolled | --- ### **8. Quality Assurance & Product Data** #### **Standard Testing** 1. Chemical analysis (spectrographic method) 2. Tensile test at room temperature 3. Hardness test (Brinell method) 4. Macroscopic examination (if specified) 5. Dimensional verification #### **Available Certifications** - EN 10204 2.1 Declaration of Compliance - EN 10204 3.1 Mill Test Certificate - EN 10204 3.2 Certified Material Test Report - Country-specific certifications available #### **Dimensional Specifications** - **Diameter Range:** 19, 20, 22, 24, 25, 28, 30, 32 mm (standard sizes) - **Tolerance:** Standard hot rolled tolerance per ASTM A29 - **Out-of-Roundness:** ≤ 75% of diameter tolerance - **Length:** 3-6 meters standard; cut-to-length available - **Weight:** Approximately 2.3-6.3 kg/meter (1.55-4.25 lb/ft) #### **Surface & Packaging** - **Surface Condition:** Natural mill scale (descaled available upon request) - **End Condition:** Saw cut (rough) or machine cut (clean) - **Bundling:** Standard mill bundles (1-3 tons) - **Marking:** Heat number, grade, size stamped at ends - **Protection:** Minimal oiling for rust prevention --- ### **9. Technical Considerations** #### **Design & Engineering** - **Fatigue Strength:** Approximately 230-260 MPa (polished specimen) - **Stress Concentration:** Kt = 1.8-2.2 for typical notch geometries - **Recommended Safety Factor:** 3.0-4.0 for dynamic loading - **Temperature Limit:** 400°C maximum for sustained service #### **Secondary Processing Recommendations** 1. **Descaling:** Required before painting or plating (shot blasting preferred) 2. **Straightening:** Cold straightening acceptable within limits 3. **Heat Treatment:** Normalizing recommended for critical applications 4. **Finishing:** Good surface for plating, painting, or other coatings #### **Comparison with Other Conditions** - **vs. Cold Drawn:** Lower strength but better formability, no residual stresses - **vs. Normalized:** Less uniform properties but more economical - **vs. Annealed:** Higher strength, better wear resistance --- ### **10. Storage & Handling Guidelines** #### **Storage Conditions** - Store in dry, well-ventilated area - Keep off ground using proper dunnage - Protect from excessive moisture - Separate by grade and size #### **Handling Precautions** - Use appropriate lifting equipment - Protect threads and precision surfaces - Avoid dropping or impact damage - Follow standard safety procedures --- **Disclaimer:** The information provided is typical for standard production. Actual properties may vary within specified ranges. For critical applications, prototype testing under actual service conditions is recommended. Consult with technical service for application-specific recommendations. This manufacturer reserves the right to modify specifications without notice. **Revision:** 3.1 **Effective Date:** November 2024 **Document Code:** HR-1030-19-32 -:- For detailed product information, please contact sales. -: AISI 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <6039 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 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1030 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1030 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 2510 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