AISI 1020 Steel, as rolled

AISI 1020 Steel, as rolled Product Information -:- For detailed product information, please contact sales. -: AISI 1020 Steel, as rolled Synonyms -:- For detailed product information, please contact sales. -:

AISI 1020 Steel, as rolled Product Information -:- For detailed product information, please contact sales. -: # **Product Specification: AISI 1020 Steel, As-Rolled** --- ## **1. Product Overview** AISI 1020 steel in the **"As-Rolled"** condition represents the most fundamental and economical supply form of this ubiquitous low-carbon steel grade. It refers to the material's state directly after the final hot-rolling or forging process, without undergoing subsequent stress-relieving, normalizing, annealing, or cold-finishing treatments. This state captures the inherent metallurgical characteristics imparted by rolling at elevated temperatures, followed by air cooling. It is characterized by a classic mill-scaled surface and a microstructure that reflects the specific rolling and cooling history, offering a cost-effective solution for a vast array of general structural and fabrication applications where precise, predictable mechanical properties are less critical than material cost and availability. ## **2. Key Features & Condition Definition** * **Economic Production:** The most direct and least expensive form of steel production, bypassing additional thermal or mechanical processing costs. * **Natural State Properties:** Mechanical properties are not guaranteed to a specific minimum standard (like ASTM A36) unless explicitly ordered as such. They are a direct result of the mill's rolling schedule and final cooling rate. * **Presence of Residual Stresses:** The uneven cooling from the rolling temperature can introduce locked-in thermal stresses and potential for slight shape distortion (warping, camber) in bars or plates. * **Variable Microstructure:** May consist of a mixture of ferrite and pearlite with grain size and banding influenced by rolling parameters, leading to some degree of directional properties. * **Scale-Covered Surface:** A dark blue-grey oxide layer (mill scale) is present, which must be removed for most finishing operations. ## **3. Standard Chemical Composition (Weight %)** | Element | AISI 1020 Specification | Typical Analysis | | :--------------- | :---------------------- | :--------------- | | **Carbon (C)** | 0.18 - 0.23 | 0.20 | | **Manganese (Mn)**| 0.30 - 0.60 | 0.45 | | **Phosphorus (P)**| ≤ 0.040 | 0.010 | | **Sulfur (S)** | ≤ 0.050 | 0.025 | | **Iron (Fe)** | Balance | Balance | ## **4. Typical (Non-Guaranteed) Mechanical Properties** *Properties are indicative and can vary significantly between heats, sections, and mills. They are generally lower and less consistent than normalized or controlled-rolled material.* | Property | Approximate Range (Metric) | Approximate Range (Imperial) | | :--------------------------------- | :------------------------- | :--------------------------- | | **Tensile Strength** | 380 - 450 MPa | 55,000 - 65,000 psi | | **Yield Strength (0.2% Offset)** | 205 - 310 MPa | 30,000 - 45,000 psi | | **Elongation in 50 mm (2 in)** | 20% - 30% | 20% - 30% | | **Hardness (Brinell)** | 110 - 145 HB | 110 - 145 HB | | **Modulus of Elasticity** | 190 - 210 GPa | 27,500 - 30,500 ksi | **Crucial Distinction:** "As-Rolled" should not be confused with **"As-Rolled to ASTM A36"**. The latter is a specific order where the mill guarantees the mechanical properties meet the minimums of the A36 standard, despite the as-rolled condition. ## **5. Primary Applications** Used in non-critical applications where material cost is paramount and properties are secondary, or where the component will undergo full thermal treatment by the end-user. * **Non-Code Structural Fabrications:** Temporary structures, non-load bearing frames, work platforms, and stakes. * **Forging & Upset Stock:** Ideal blank material for parts that will be hot-forged and heat-treated, as the initial as-rolled condition is irrelevant to the final forged product. * **Base Material for Heat Treatment:** Commonly purchased by heat treaters as raw material for subsequent normalizing, annealing, carburizing, or quenching & tempering processes. * **General Purpose Bars & Shapes:** For prototyping, shop projects, fixtures, and components where precise strength values are not engineered into the design. * **Agricultural Implements:** Non-critical parts for tillage and harvesting equipment. ## **6. Relevant International Standards (Base Material)** Standards typically define the chemical composition; the "As-Rolled" condition is a commercial supply term rather than a standardized temper. * **AISI (USA):** AISI 1020 (Chemical Comp. Standard) * **ASTM (USA):** **ASTM A510** (Standard Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel) - often supplied as-rolled. Not to be confused with ASTM A36. * **SAE (USA):** SAE J403, SAE J412 (Chemical Compositions) * **UNS (USA):** UNS G10200 * **DIN (Germany):** 1.0402 / C22 (Material Number & Designation) * **JIS (Japan):** JIS S20C (Similar grade, often supplied as-rolled) ## **7. Fabrication & Processing Considerations** * **Machining:** Can be machined, but the uneven microstructure and potential hardness variations may cause inconsistent tool life and surface finish. The hard mill scale is abrasive to cutting tools. * **Welding:** **Excellent weldability** due to low carbon content. However, the residual stresses from rolling can combine with welding stresses, increasing the risk of distortion or cracking in restrained joints. Stress-relieving after welding may be advisable for critical fabrications. * **Forming/Cutting:** Good hot-forming properties. Cold forming is possible but may be less predictable than with normalized steel. The material can be sheared, sawed, or torch-cut. * **Subsequent Heat Treatment:** **Highly recommended for critical applications.** A simple **normalizing** heat treatment (austenitizing and air cooling) will refine the grain structure, relieve internal stresses, and homogenize mechanical properties, providing more predictable and improved performance. ## **8. Availability & Ordering Clarification** * **Forms:** Round, square, flat bars; angles, channels, beams; plates and sheets. * **Condition:** Sold explicitly as **"As-Rolled" (AR)** or **"Mill Edge."** * **Important Note:** Buyers must specify if they require guaranteed mechanical properties (e.g., "As-Rolled to meet ASTM A36") or if they are accepting the inherent, variable properties of truly "As-Rolled" material. The latter is typically a lower-cost option. --- **Disclaimer:** This product is supplied without guarantee of mechanical properties unless otherwise specified in the purchase order. The "As-Rolled" condition implies acceptance of the material's natural state with inherent variability in strength, ductility, and internal stress levels. It is the sole responsibility of the user to evaluate the material's fitness for purpose. For any application where structural integrity, predictable machining, or dimensional stability is important, specifying normalized or a guaranteed grade (e.g., ASTM A36) is strongly advised. -:- For detailed product information, please contact sales. -: AISI 1020 Steel, as rolled Specification Dimensions Size： Diameter 20-1000 mm Length <5446 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 1020 Steel, as rolled Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1020 Steel, as rolled -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1020 Steel, as rolled -:- For detailed product information, please contact sales. -:

Packing of AISI 1020 Steel, as rolled -:- 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 1917 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