AISI 1022 Steel, annealed

AISI 1022 Steel, annealed at 870°C (1600°F) Product Information -:- For detailed product information, please contact sales. -: AISI 1022 Steel, annealed at 870°C (1600°F) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1022 Steel, annealed at 870°C (1600°F) Product Information -:- For detailed product information, please contact sales. -: # **Product Technical Specification: AISI 1022 Steel, Annealed at 870°C (1600°F)** --- ## **1. Product Overview** AISI 1022 steel in the **Annealed** condition represents the most ductile and machinable state achievable for this low-carbon, medium-manganese grade. The annealing process involves heating the steel to **870°C (1600°F)** – within its austenitizing range – holding to achieve complete phase transformation, followed by **slow, controlled furnace cooling**. This full annealing treatment maximizes the steel's formability and machinability by producing a coarse, stable, and stress-free microstructure. It is the preferred starting condition for components requiring extensive cold forming, complex machining, or as a preparatory step for further processing where a uniform, predictable, and low-stress foundation is essential. ## **2. Key Features & Benefits of Annealing at 870°C** * **Maximum Softness and Ductility:** Achieves the lowest hardness and highest elongation for AISI 1022, providing exceptional cold formability for severe bending, deep drawing, and other cold working operations. * **Complete Stress Elimination:** The slow furnace cooling effectively eliminates virtually all residual internal stresses from prior rolling, forging, or machining, ensuring unparalleled dimensional stability. * **Microstructural Homogenization:** Produces a coarse, equilibrium microstructure of ferrite and pearlite, ensuring uniform mechanical and thermal properties throughout the component. * **Optimized Machinability:** The soft, uniform structure allows for low cutting forces, reduced tool wear, and easy chip formation. While chips may be longer and stringier than in cold-worked states, surface finish quality can be excellent with proper tooling. * **Predictable Metallurgical Baseline:** Establishes a consistent, reproducible, and well-characterized starting condition for subsequent quality control or heat treatment processes. ## **3. Standard Chemical Composition (Weight %)** | Element | AISI 1022 Specification | Typical Analysis | | :--------------- | :---------------------- | :--------------- | | **Carbon (C)** | 0.18 - 0.23 | 0.20 | | **Manganese (Mn)**| **0.70 - 1.00** | 0.85 | | **Phosphorus (P)**| ≤ 0.040 | 0.010 | | **Sulfur (S)** | ≤ 0.050 | 0.025 | | **Iron (Fe)** | Balance | Balance | *Note: The higher manganese content (0.70-1.00%) compared to AISI 1020 results in slightly higher annealed strength while still maintaining excellent ductility.* ## **4. Typical Mechanical Properties (Annealed Condition)** *Properties are representative for material fully annealed at 870°C (1600°F) and furnace-cooled.* | Property | Metric Value | Imperial Value | | :--------------------------------- | :-------------------- | :-------------------- | | **Tensile Strength** | 380 - 450 MPa | 55,100 - 65,300 psi | | **Yield Strength (0.2% Offset)** | 300 - 360 MPa | 43,500 - 52,200 psi | | **Elongation in 50 mm (2 in)** | **30% - 40%** | **30% - 40%** | | **Reduction of Area** | **60% - 70%** | **60% - 70%** | | **Hardness** | 110 - 135 HB | 110 - 135 HB | | **Modulus of Elasticity** | 190 - 210 GPa | 27,500 - 30,500 ksi | **Physical Properties:** * Density: 7.87 g/cm³ (0.284 lb/in³) * Melting Point: ~1520°C (2768°F) ## **5. Primary Applications** This condition is specified for applications where maximum formability, ease of machining, or a stress-free state is the primary engineering requirement. * **Complex Cold Forming & Deep Drawing:** Components requiring severe deformation without cracking, such as complex housings, shells, and intricate stamped parts. * **Extensive Machining Operations:** Parts where maximum tool life, minimal power consumption, and superior surface finish are critical, especially when final strength will be achieved through subsequent case hardening. * **Precision Parts Requiring Absolute Stability:** Gauge blocks, reference standards, and fixture plates where any post-machining dimensional movement must be eliminated. * **Welding Pre-/Post-Treatment:** Used as a pre-anneal for highly restrained, complex weldments to prevent cracking, or as a full post-weld anneal to restore maximum ductility and relieve weld stresses. * **Fastener Production (Pre-form):** Wire and rod stock for cold forging of bolts, rivets, and complex headed parts where maximum ductility is required before the forming operation. * **Starting Stock for Further Processing:** The ideal soft condition prior to cold drawing, or for parts that will be carburized, providing a uniform, stress-free core. ## **6. Conforming International Standards** Annealed AISI 1022 is supplied under standards that encompass annealed conditions or as a customer-specific requirement. * **AISI (USA):** AISI 1022 (Base Grade) * **ASTM (USA):** **ASTM A29/A29M** (Specifies annealed condition as an option). **ASTM A519** (Seamless Mechanical Tubing) often supplied annealed. * **SAE (USA):** SAE J403, SAE J412 (Chemical). * **UNS (USA):** UNS G10220 * **ISO (International):** ISO 683-18 may include annealed conditions by agreement. * **DIN (Germany):** 1.0406 / C18 or 1.1151 / C22 (+A for annealed per EN 10083-2). * **EN (Europe):** EN 10083-2 designates "+A" for annealed delivery condition. ## **7. Fabrication & Processing Notes** * **Formability:** Offers the **maximum formability** for this steel grade. Ideal for severe bending, spinning, and deep drawing operations. * **Machinability:** Produces long, continuous chips which may require effective chip-breaking strategies in automated machining. Cutting forces are low, and surface finish can be excellent with sharp, high-rake tooling. * **Welding:** Excellent weldability. However, the heat of welding will locally alter the annealed microstructure, creating a harder heat-affected zone (HAZ). For critical welds, a full re-anneal may be necessary post-welding. * **Subsequent Heat Treatment:** This is the standard preparatory condition for **carburizing**. The stress-free, uniform core ensures predictable case depth, minimizes distortion during high-temperature carburizing, and provides optimal toughness after quenching. * **Strain Aging:** As a fully annealed low-carbon steel, it may be susceptible to slight strain aging over time after cold working. ## **8. Availability & Identification** * **Forms:** Round/square bars, wire, tubing, sheets, and plates. * **Condition:** Supplied as **Annealed (A)** or **Soft Annealed**. * **Microstructure:** Coarse ferrite and pearlite. * **Surface:** Typically has a black oxide anneal scale unless processed in a protective atmosphere (bright annealed). --- **Disclaimer:** The information provided is for reference purposes. The properties listed represent a fully softened condition. Actual properties can vary based on furnace cycle and cooling rate. Annealed material is not intended for structural applications in its soft state unless designed accordingly. Users must verify that the low strength and high ductility are suitable for the intended service. For applications requiring both good machinability and higher strength, a **normalized** condition is recommended. The higher manganese content provides slightly better strength in the annealed state compared to AISI 1020, but the primary characteristic remains maximum ductility. -:- For detailed product information, please contact sales. -: AISI 1022 Steel, annealed at 870°C (1600°F) Specification Dimensions Size： Diameter 20-1000 mm Length <5466 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 1022 Steel, annealed at 870°C (1600°F) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1022 Steel, annealed at 870°C (1600°F) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1022 Steel, annealed at 870°C (1600°F) -:- For detailed product information, please contact sales. -:

Packing of AISI 1022 Steel, annealed at 870°C (1600°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 1937 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