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Technical Specifications
Product Overview
Metallurgical Characteristics
SAE 1112 is a low-carbon, resulfurized steel with a predominantly ferritic microstructure containing uniformly distributed manganese sulfide inclusions. These sulfide inclusions act as chip breakers during machining operations, providing exceptional machinability while maintaining adequate structural properties for light to medium-duty applications.
Heat Treatment Process
MetalZenith employs controlled hot rolling at temperatures between 1150-1200°C followed by controlled cooling to achieve optimal microstructure. For enhanced properties, normalizing at 870-920°C can be applied. Stress relief annealing at 550-650°C is recommended for machined components to minimize residual stresses.
Manufacturing Process Excellence
Our advanced steelmaking process includes precise sulfur addition control and calcium treatment to optimize sulfide morphology. The controlled rolling process ensures uniform grain structure and consistent mechanical properties throughout the cross-section, while maintaining the free-machining characteristics essential for high-speed production.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including machinability evaluation using standardized cutting tests, weldability assessment through bend testing and macro examination, cold forming capability testing, fatigue strength evaluation under cyclic loading conditions, and atmospheric corrosion resistance testing in controlled environments to ensure long-term structural performance.
Structural Application Considerations
For building structures, SAE 1112 provides excellent fabrication characteristics with good weldability using appropriate techniques. In bridge engineering applications, the material offers reliable performance for secondary structural elements. For mechanical manufacturing, the superior machinability enables high-precision component production. In vehicle manufacturing, it serves well for brackets and non-critical structural parts. For general engineering applications, the balance of strength, ductility, and machinability makes it ideal for high-volume production of structural components.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.13 max |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | 0.07 - 0.12 |
| Sulfur (S) | 0.16 - 0.23 |
| Silicon (Si) | 0.10 max |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 275 |
| Tensile Strength (MPa) | 415 - 550 |
| Elongation (%) | ≥ 22 |
| Impact Energy at 20°C (J) | ≥ 27 |
| Hardness (HB) | 121 - 163 |
| Fatigue Strength (MPa) | 180 - 220 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.87 |
| Melting Point (°C) | 1510 - 1540 |
| Thermal Conductivity (W/m·K) | 51.9 |
| Thermal Expansion (×10??/K) | 11.7 |
| Elastic Modulus (GPa) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Bars, Rods, Plates, Sheets, Wire |
| Diameter Range (Bars) | 6 - 300mm |
| Thickness Range (Plates) | 3 - 50mm |
| Width Range | 500 - 2000mm |
| Length Range | 3000 - 12000mm |
| Standards Compliance | ASTM A108, SAE J403, AISI 1112 |
| Surface Condition | Hot Rolled, Cold Drawn, Turned & Polished |
| Machinability Rating | 100% (Reference Standard) |
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Our Advantages in Processing SAE 1112 Steel
Advanced Hot Rolling Technology
MetalZenith employs controlled hot rolling processes with precise temperature control and optimized sulfur distribution to achieve superior machinability while maintaining structural integrity. Our advanced rolling techniques ensure consistent grain structure and enhanced surface quality throughout the material cross-section.
Comprehensive Structural Testing
Our quality assurance program includes specialized testing for structural applications: welding performance evaluation, cold forming capability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing to ensure long-term durability in structural environments.
Custom Processing & Technical Support
MetalZenith offers tailored processing solutions including custom heat treatment, precision cutting, and surface finishing services. Our technical team provides comprehensive support for structural design optimization, machining parameter recommendations, and application-specific material modifications.
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