AISI 1015 Steel, normalized

AISI 1015 Steel, normalized at 925°C (1700°F) Product Information -:- For detailed product information, please contact sales. -: AISI 1015 Steel, normalized at 925°C (1700°F) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1015 Steel, normalized at 925°C (1700°F) Product Information -:- For detailed product information, please contact sales. -: ## **Product Specification: AISI 1015 Low Carbon Steel, Normalized Condition** ### **Product Designation** * **Standard Name:** AISI 1015 / SAE 1015 * **UNS Number:** G10150 * **Condition:** **Normalized** * **Normalizing Temperature:** **925°C (1700°F)** * **Key Feature:** A refined, homogeneous microstructure providing optimal and consistent mechanical properties, improved machinability, and a perfect starting condition for further heat treatment or critical manufacturing. ### **Overview** AISI 1015 in the **normalized condition** represents a significant upgrade over the as-rolled state. Normalizing is a heat treatment process where the steel is heated to approximately 925°C (1700°F)—well above its upper critical temperature—held to achieve a uniform austenitic structure, and then air-cooled. This process **refines the grain structure, eliminates the coarse and non-uniform microstructure from rolling, relieves internal stresses, and produces a more homogeneous and predictable distribution of ferrite and pearlite**. The result is a material with enhanced ductility, improved toughness, more uniform machining characteristics, and a consistent response to subsequent operations like case hardening. --- ### **1. Chemical Composition (Typical % by Weight, AISI/SAE Standard)** The composition remains that of standard AISI 1015; the properties are altered by the thermal cycle, not the chemistry. | Element | Content (%) | Role & Effect after Normalizing | | :--- | :--- | :--- | | **Carbon (C)** | 0.13 - 0.18 | Forms fine lamellar pearlite within a ferrite matrix upon air cooling. The uniformity of this structure dictates the final mechanical properties. | | **Manganese (Mn)** | 0.30 - 0.60 | Slows the transformation from austenite during cooling, allowing for the formation of a finer pearlitic structure, which increases strength and toughness. | | **Phosphorus (P)** | 0.040 max | Impurity; controlled. | | **Sulfur (S)** | 0.050 max | Impurity; controlled. | | **Iron (Fe)** | Balance | Forms the fine-grained ferrite matrix. | **Microstructure:** Fine, equiaxed ferrite grains with uniformly dispersed, fine pearlite colonies. This is a **refined and uniform** version of the as-rolled structure. --- ### **2. Physical & Mechanical Properties (Normalized at 925°C / 1700°F)** **A. Physical Properties** * **Density:** 7.87 g/cm³ * **Elastic Modulus (E):** 200 GPa (29,000 ksi) * **Poisson's Ratio:** 0.29 * **Thermal Conductivity:** ~59.5 W/m·K **B. Mechanical Properties (Typical, After Normalizing)** *Properties are more consistent and isotropic than in the as-rolled state.* * **Yield Strength (0.2% Offset):** **330 - 415 MPa (48 - 60 ksi)** * **Tensile Strength:** **480 - 585 MPa (70 - 85 ksi)** * **Elongation in 50 mm:** **25% - 35%** (Improved ductility over as-rolled) * **Reduction of Area:** **45% - 60%** * **Hardness (Brinell):** **130 - 170 HB** * **Impact Toughness (Charpy V-Notch):** **Significantly improved** due to grain refinement. Typically 50-100% higher than as-rolled. * **Machinability:** **Very Good to Excellent.** The uniform, fine-grained structure provides consistent tool wear, better surface finish, and more predictable chip formation compared to the variable as-rolled condition. * **Dimensional Stability:** Excellent. Internal stresses from rolling are relieved, minimizing distortion during subsequent machining. --- ### **3. Product Applications** Normalized AISI 1015 is specified for applications requiring reliable, consistent properties and where the material will undergo critical processing. * **Precision Machined Components:** Parts requiring tight tolerances and stable dimensions, such as gears blanks, shafts, and complex fittings, where uniform machinability is critical. * **Precursor to Case Hardening:** The **ideal starting condition for carburizing.** The fine, uniform grain structure allows for **predictable and uniform carbon diffusion**, resulting in a consistent case depth and hardness profile. It prevents abnormal grain growth during the high-temperature carburizing cycle. * **Forgings (Post-Forging Heat Treatment):** Forgings are often normalized to refine the coarse, deformed grain structure resulting from the forging process, restoring ductility and toughness. * **Critical Fabricated Parts:** Components that will be welded and must maintain good toughness in the heat-affected zone. * **Tooling & Fixtures:** For jigs and fixtures requiring dimensional stability and good wear resistance in the normalized state. --- ### **4. International Standards & Designations** | Standard System | Designation | Notes / Key Comparison | | :--- | :--- | :--- | | **SAE / AISI (USA)** | **SAE 1015, Normalized** | The base grade with a specified heat treatment condition. | | **UNS (USA)** | **G10150** | Unified Numbering System. | | **ASTM (USA)** | **ASTM A29** (with supplementary requirement S1 for annealed or normalized), or customer drawing specification. | Often called out as a special requirement on material certifications. | | **DIN / EN (Germany/EU)** | **C15N (1.1141)** | The "N" suffix in DIN/EN standards (e.g., C15N, C15+N) explicitly denotes a normalized delivery condition. | | **JIS (Japan)** | **S15C-N** | The "-N" suffix indicates normalized condition in JIS standards. | | **GB (China)** | **15 (Normalized)** | The condition is specified separately in the ordering requirements. | | **ISO** | **ISO 683-1: C15E (condition +N)** | The "+N" denotes normalized. | --- ### **Technical Rationale & Benefits of 925°C Normalizing** 1. **Grain Refinement:** Heating to 925°C fully austenitizes the steel, dissolving all carbides. Upon controlled air cooling, new, fine ferrite and pearlite grains nucleate and grow, replacing the often elongated and varied grains from rolling. 2. **Stress Relief:** Eliminates residual stresses locked in from uneven cooling after rolling, preventing warping during machining. 3. **Homogenization:** Creates a uniform chemical and microstructural composition throughout the cross-section, ensuring consistent properties in all directions. 4. **Improved Hardenability (for case hardening):** A fine prior austenite grain size (from normalizing) provides more grain boundary area for carbon diffusion during carburizing, leading to a more efficient and uniform case. ### **Summary** **AISI 1015 steel normalized at 925°C (1700°F) is a premium, process-optimized version of this common grade.** It transcends the role of a simple commodity material by offering **enhanced and predictable mechanical properties, superior machinability, and an ideal microstructure for further transformation.** This condition is not an end-state but a **critical preparatory step** for high-integrity manufacturing. It is the specified choice for engineers who require consistency, reliability, and optimal performance in components that will be precision machined and/or case hardened. The normalized condition, codified in standards like **DIN C15N** and **JIS S15C-N**, represents the application of controlled metallurgy to elevate a basic steel into a reliable engineering material. -:- For detailed product information, please contact sales. -: AISI 1015 Steel, normalized at 925°C (1700°F) Specification Dimensions Size： Diameter 20-1000 mm Length <4755 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 1015 Steel, normalized at 925°C (1700°F) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1015 Steel, normalized at 925°C (1700°F) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1015 Steel, normalized at 925°C (1700°F) -:- For detailed product information, please contact sales. -:

Packing of AISI 1015 Steel, normalized at 925°C (1700°F) -:- 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 1226 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