AISI 1070 Steel, hot rolled

AISI 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Data Sheet: AISI 1070 Steel, Hot-Rolled Round Bar (19-32 mm / 0.75-1.25 in)** **1. Overview** AISI 1070 is a very high-carbon, non-alloy steel known for its exceptional potential for hardness and strength after heat treatment. Supplied in the as-rolled condition as a hot-rolled round bar, this product features a characteristic mill scale surface and a pearlitic microstructure that provides moderate strength and good machinability in its delivery state. It serves as a cost-effective raw material for components that will undergo forging, machining, and subsequent quenching and tempering to achieve superior wear resistance and durability. The 19-32 mm diameter range is versatile for a wide array of industrial applications. --- **2. Chemical Composition (AISI/SAE Standard)** The composition is defined by a narrow, high carbon range critical to its performance. | Element | Content (%) | | :--- | :--- | | **Carbon (C)** | **0.65 - 0.75** | | **Manganese (Mn)** | 0.60 - 0.90 | | **Phosphorus (P)** | ≤ 0.040 | | **Sulfur (S)** | ≤ 0.050 | | **Silicon (Si)** | 0.15 - 0.35 (typical) | | **Iron (Fe)** | Balance | --- **3. Typical Physical & Mechanical Properties (As-Hot Rolled)** *Note: Properties are for the "black," as-rolled state prior to any further processing or heat treatment.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 190-210 GPa (27.5-30.5 x 10⁶ psi) | | **Tensile Strength** | **625 - 750 MPa (90 - 109 ksi)** | | **Yield Strength (0.2% Offset)** | **345 - 415 MPa (50 - 60 ksi)** | | **Elongation (in 50mm / 2in)** | **~ 12%** | | **Reduction in Area** | **~ 30%** | | **Hardness** | **187 - 229 HB** (Brinell) | | **Machinability** | **Fair (~55% of AISI 1212).** Acceptable in the as-rolled state for many operations, but significantly improved by normalizing or annealing. | | **Surface Condition** | Standard hot-rolled finish with mill scale. Dimensional tolerances are wider than for cold-finished products. | --- **4. Key Characteristics & Heat Treatment Response** * **High Hardenability:** This is the defining characteristic. AISI 1070 responds exceptionally well to quenching (in oil or water) and tempering, achieving very high hardness levels (up to 60-65 HRC) and excellent wear resistance. * **Moderate As-Rolled Strength:** Provides a usable strength for handling and initial fabrication. * **Fair Ductility:** Allows for some straightening, bending, or forming in the as-rolled state, though it is less ductile than lower-carbon steels. * **Poor Weldability:** **Generally not recommended for welding.** The high carbon content creates a high susceptibility to cracking in the heat-affected zone (HAZ). If welding is absolutely necessary, it requires extensive preheating (300-400°C / 575-750°F), controlled interpass temperature, and post-weld stress relieving. * **Final Properties Dictated by Heat Treatment:** The true potential of AISI 1070 is unlocked through controlled thermal processing (e.g., austenitizing, quenching, and tempering). --- **5. Primary Product Applications** AISI 1070 hot-rolled round bar is a fundamental feedstock for manufacturing high-strength, wear-critical components across various industries. * **Forging Stock:** Ideal as raw material for drop forging or hammer forging into tools and high-stress components like wrenches, levers, and agricultural tool blanks. * **Cutting Tools & Blades:** Used for manufacturing industrial knives, scrapers, mower blades, and shear blades after appropriate heat treatment. * **Springs:** A premier choice for high-stress mechanical springs, including heavy-duty coil springs, leaf springs for trucks, and torsion bars, where its high elastic limit is critical. * **Shafts & Axles:** For applications requiring high surface hardness and wear resistance, such as light-duty axles, rollers, and pins. * **Wear Parts:** Components like plow shares, cultivator teeth, chain links, and grader blades that operate in abrasive environments. * **Hand Tools:** High-quality hammers, chisels, and punches (often forged from this material). --- **6. Relevant International & Industry Standards** This product form is covered under general hot-rolled steel bar specifications. | Standard System | Standard Designation | Title / Scope | | :--- | :--- | :--- | | **AISI / SAE / UNS (USA)** | **AISI 1070, SAE 1070, UNS G10700** | Standard Grade Designation | | **ASTM (USA)** | **ASTM A29/A29M** | Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought | | **ASTM (USA)** | **ASTM A576** | Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality | | **DIN (Germany)** | **1.1231 / C70W2** | Equivalent grade for hardening steel. | | **JIS (Japan)** | **SWRH72A / SWRH72B** | Similar high-carbon grades (typically for wire rod). | | **GB (China)** | **70#** | (GB/T 699, Quality Carbon Structural Steel) | | **EN (Europe)** | **1.1231 (1.0603)** | Similar composition under EN 10083-2 for quenching and tempering steels. | --- **Manufacturing Pathway:** The typical use for AISI 1070 hot-rolled round bar follows this sequence: 1. **Rough Machining/Forging:** The component is shaped from the as-rolled bar. 2. **Heat Treatment (Critical Step):** The part is hardened (quenched) and then tempered to the required hardness and toughness. 3. **Finish Machining/Grinding:** Final dimensions and surface finish are achieved, often by grinding due to the part's hardness. **Summary:** AISI 1070 hot-rolled round bar is a high-carbon workhorse steel. It offers an economical entry point for fabricators who possess in-house heat-treating capabilities or work with specialized heat treaters. Its value lies not in its as-delivered state, but in its exceptional **potential** to be transformed into an extremely hard, strong, and wear-resistant final component through proper thermal processing. -:- For detailed product information, please contact sales. -: AISI 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4864 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 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1070 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1070 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 1335 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