AISI 1075 Carbon Steel Foil/Strip Bar

AISI 1075 Carbon Steel Foil Bar Product Information -:- For detailed product information, please contact sales. -: AISI 1075 Carbon Steel Foil Bar Synonyms -:- For detailed product information, please contact sales. -:

AISI 1075 Carbon Steel Bar Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI 1075 Carbon Steel Bar** **AISI 1075** is a **high-carbon, non-alloy steel bar** renowned for its excellent combination of high strength, good hardenability, and superior wear resistance. As one of the most widely used high-carbon grades in the AISI/SAE 10xx series, it contains a carbon content that positions it at the threshold between high-strength engineering steel and simple tool steel. This makes it a versatile and cost-effective choice for a vast array of demanding applications, particularly those involving springs, cutting edges, and high-stress components that require heat treatment. AISI 1075 is valued for its ability to be readily heat treated (quenched and tempered) to achieve a wide range of hardness and strength levels, from tough, resilient springs to hard, wear-resistant tools. It offers a more balanced hardenability and slightly better toughness than the highest carbon grades (like 1095), while providing significantly greater strength potential than medium-carbon steels like 1045. --- ## **1. Chemical Composition (Per AISI/SAE 1075 Standard)** The composition is precisely controlled to deliver consistent hardenability and performance. | Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | **Key Characteristic** | | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | **0.70 - 0.80** | 0.40 - 0.70 | ≤ 0.040 | ≤ 0.050 | **High-carbon steel optimized for hardening and spring properties.** | | **Role** | **Primary driver of hardness, strength, and wear resistance.** | Enhances hardenability and solid solution strength. | Impurity; kept low. | Impurity; kept low. | A plain carbon steel, not a free-machining grade. | **Critical Features of the Composition:** * **High Carbon Content (0.70-0.80%):** This is the defining feature, providing the capacity to develop high hardness (up to ~66 HRC) and a high elastic limit after proper heat treatment, which is essential for spring applications. * **Moderate Manganese:** The manganese range is sufficient to provide good hardenability for oil quenching of moderate sections, allowing for uniform through-hardening, but is not so high as to excessively increase cracking sensitivity. * **Ideal for Springs:** The carbon and manganese balance is particularly well-suited for achieving the high yield strength and good fatigue resistance required in spring steel. --- ## **2. Physical & Mechanical Properties** Properties vary dramatically based on the **supplied condition** (e.g., hot-rolled, annealed, spheroidized) and the **final heat treatment**. **A. Common Supplied Conditions (for further processing):** * **Hot-Rolled (HR):** Hardness: ~235-302 HB. Poor machinability, used as forging stock or for parts with heavy machining allowance. * **Annealed/Spheroidized (ANN):** Hardness: ≤ 207 HB. Softer, designed for machining prior to hardening. * **Cold Drawn (CD):** Higher strength and better surface finish than HR. May be supplied in various tempers (e.g., hard drawn for springs). **B. After Quenching & Tempering (Example Final States):** * **Spring Temper (e.g., tempered at ~400-500°C / 750-930°F):** * Hardness: **40 - 50 HRC** * Tensile Strength: **1400 - 1800 MPa** * Excellent elastic limit and fatigue strength. * **Tool/Wear Temper (e.g., tempered at ~200-300°C / 390-570°F):** * Hardness: **55 - 62 HRC** * High wear resistance, lower toughness. * **General Characteristics:** Good fatigue strength, high compressive strength, and moderate toughness (for its hardness level) when properly tempered. --- ## **3. Product Applications** AISI 1075 is a fundamental material across multiple industries, prized for its performance after heat treatment. * **Springs (Primary Application):** **Coil springs, leaf springs, torsion bars, and spring clips** for automotive, agricultural, and industrial equipment. * **Cutting Tools & Blades:** **Knives, mower blades, hand tools (chisels, punches), and agricultural cutting edges.** * **High-Stress Fasteners & Shafts:** **Heavy-duty bolts, pins, and axles** that are heat-treated for strength. * **Wear Parts:** **Liners, scraper blades, and wear plates** in abrasive environments. * **Automotive Components:** **Clutch springs, valve springs, and suspension components.** --- ## **4. International & Equivalent Standards** AISI 1075 is a globally recognized grade with direct equivalents. | Standard System | Equivalent Grade | **Notes** | | :--- | :--- | :--- | | **AISI / SAE (USA)** | **1075** | The defining standard. | | **UNS** | G10750 | Unified Numbering System. | | **ASTM A29/A29M** | Grade 1075 (Bars) | Governing standard for hot-wrought or cold-finished bars. | | **ASTM A682** | Grade 1075 (Cold-Rolled Strip) | For spring steel strip. | | **EN 10083-2** | **1.1248 (C75E)** | European equivalent (C: 0.72-0.80%). "C75E" is the engineering steel designation. | | **JIS G4801** | **SUP9** | Japanese spring steel equivalent (0.56-0.64%C, Si-added). For similar application, **SK4/SK5** (JIS G4401) are closer in carbon content. | | **GB/T 699** | **75# Steel** | Chinese equivalent (0.72-0.80%C). | | **Common Synonyms** | Often referred to simply as **"spring steel 1075"**. | | **Key Distinction:** When ordering, it is crucial to specify both the **grade (AISI 1075)** and the **condition or temper** (e.g., "Hot Rolled", "Annealed", "Spring Temper", "Hard Drawn") to ensure receipt of material suitable for the intended manufacturing process. --- ## **5. Key Advantages & Considerations** **Advantages:** * **Excellent Hardenability & Strength:** Can be heat treated to achieve a very wide and useful range of high strength and hardness levels. * **Superior Spring Properties:** The carbon content is ideal for developing a high elastic limit, making it one of the most popular choices for high-performance spring applications. * **Good Wear Resistance:** When hardened, it provides excellent resistance to abrasion and wear. * **Cost-Effective Performance:** Delivers properties approaching those of low-alloy steels at a lower material cost. * **Proven Reliability:** Decades of use have established well-understood processing guidelines and performance data. **Considerations:** * **Requires Heat Treatment:** To achieve its notable properties, quenching and tempering are mandatory, adding cost and process complexity. * **Moderate Machinability:** Machinability is fair only in the fully softened (annealed) condition. In the hardened state, it is difficult to machine. * **Sensitivity to Quench Cracking:** The high carbon content increases the risk of cracking during quenching, requiring proper process control (often oil quenching) and immediate tempering. * **Limited Weldability:** **Poor weldability.** Welding is generally not recommended due to the high carbon content, which leads to a brittle heat-affected zone and high cracking susceptibility. If welding is absolutely necessary, extensive pre-heat and post-heat procedures are required. --- **Disclaimer:** The properties and performance of AISI 1075 are **highly dependent on the final heat treatment.** The values provided are typical ranges. For engineering design, it is essential to: 1. **Collaborate with a qualified heat treater** to define the optimal austenitizing temperature, quench medium, and tempering cycle for the specific component geometry and desired properties. 2. **Always specify the required condition** (annealed, spheroidized, hot-rolled, etc.) when ordering raw material. 3. **Consider the inherent trade-off:** Higher hardness (for wear) comes with lower toughness. The tempering temperature must be selected based on the primary service requirement (e.g., wear vs. impact resistance). -:- For detailed product information, please contact sales. -: AISI 1075 Carbon Steel Bar Specification Dimensions Size： Diameter 20-1000 mm Length <5113 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 1075 Carbon Steel Bar Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1075 Carbon Steel Foil Bar -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1075 Carbon Steel Foil Bar -:- For detailed product information, please contact sales. -:

Packing of AISI 1075 Carbon Steel Foil/Strip Bar -:- 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 Foil/Strip 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 1584 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