AISI 1084 Steel Wire, UNS G10840

AISI 1084 Steel Wire, Hot Rolled Bar (UNS G10840) Product Information -:- For detailed product information, please contact sales. -: AISI 1084 Steel Wire, Hot Rolled Bar (UNS G10840) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1084 Steel, Hot Rolled Bar (UNS G10840) Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: AISI 1084 Steel Hot Rolled Bar (UNS G10840)** **Product Description:** This product is a **Hot Rolled Carbon Steel Bar** manufactured from AISI 1084 / UNS G10840 steel, a high-carbon, non-alloy steel. It is supplied in the as-rolled condition, meaning the final shaping is achieved by rolling the steel at elevated temperatures (above its recrystallization temperature). This process provides a cost-effective product with improved mechanical properties over cast steel, but without the additional thermal treatments like annealing or normalizing. Hot-rolled AISI 1084 bars are characterized by a characteristic mill scale surface and are an economical raw material for components that will undergo subsequent forging, machining, and/or full heat treatment. --- #### **1. Chemical Composition (Weight %)** The composition conforms to standard specifications for AISI 1084 / UNS G10840 steel. | Element | Content (%) | Element | Content (%) | | :------ | :---------- | :------ | :---------- | | **Carbon (C)** | 0.80 - 0.93 | **Manganese (Mn)** | 0.60 - 0.90 | | Silicon (Si) | 0.15 - 0.30 | Phosphorus (P) | ≤ 0.040 | | Sulfur (S) | ≤ 0.050 | Iron (Fe) | Balance | *Key Note: The carbon content is at the higher end of the "108X" series, making it particularly suitable for applications requiring very high hardness and good edge retention after heat treatment.* --- #### **2. Physical & Mechanical Properties (As-Hot Rolled Condition)** *Properties are typical for medium-sized hot-rolled bars. They can vary significantly based on the final rolling temperature, cooling rate, and bar cross-sectional size.* * **Tensile Strength:** 620 - 900 MPa (90 - 130 ksi) * **Yield Strength (0.2% Offset):** 350 - 480 MPa (51 - 70 ksi) * **Elongation (in 50mm):** 10% - 15% * **Reduction of Area:** 20% - 35% * **Hardness (Brinell):** 201 - 269 HB * **Modulus of Elasticity:** 190 - 210 GPa (27,500 - 30,500 ksi) * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Machinability:** Fair to Poor (~40-50% compared to AISI 1212). The as-rolled structure can be inconsistent, and the high carbon content makes it abrasive on tools. Machinability improves significantly after annealing. * **Surface Finish:** Characterized by a dark, oxidized layer known as mill scale, which must be removed (by pickling, shot blasting, or machining) for many applications. --- #### **3. Key Characteristics & Metallurgical State** * **As-Hot Rolled State:** The microstructure consists of a mixture of **pearlite and ferrite networks**, often with a non-uniform grain structure due to variable cooling rates from the rolling temperature. Internal stresses may be present. * **Hardenability:** Very Good. AISI 1084 responds excellently to heat treatment. It can achieve high surface hardness (up to 65 HRC with water quenching) and is a favorite for through-hardening of thin to medium sections. * **Forgability:** Good at appropriate temperatures (1050°C - 1200°C). Commonly used as a starting stock for hot forging operations to make tools and blades. * **Weldability:** Extremely Poor. The very high carbon content makes it highly susceptible to cracking in the heat-affected zone. Welding is not recommended without extraordinary precautions and post-weld heat treatment. --- #### **4. Typical Applications** Hot-rolled AISI 1084 bars are used as raw material for components that are either reforged or undergo final machining and heat treatment. * **Cutlery & Blades:** A premier choice for high-quality knife blades, swords, and cutting tools (after proper forging and heat treatment). * **Hand Tools:** Stock for wrenches, chisels, punches, and screwdrivers that will be hot forged or machined and then heat-treated. * **Springs:** Used for manufacturing heavy-duty flat springs or coil springs (after hardening and tempering). * **Wear Parts:** Agricultural tools, scraper blades, and grader edges. * **Industrial Components:** Shafts, axles, and pins requiring high wear resistance after heat treatment. * **Metalworking Tools:** Dies, cutting bits, and striking tools. --- #### **5. International & Industry Standards** This hot-rolled product meets or is equivalent to the specifications under the following standards: * **ASTM A29/A29M:** Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished (Grade 1084) * **SAE J403:** Chemical Composition of SAE Carbon Steels (Grade 1084) * **UNS:** **G10840** * **AMS:** 5121 (for spring applications) * **FED:** QQ-S-700 (Grade 1084) * **ISO 683-18:** Heat-treatable steels, alloy steels and free-cutting steels - Part 18: Bright products (Comparable grades: C85U, C90U) * **DIN:** 1.1264 / C85U * **JIS:** G4401 SK5 / SK4 (Similar, but not exact equivalents) --- #### **6. Supply Information** * **Condition:** Hot-rolled, black (with mill scale). Can be supplied as shot blasted or pickled upon request. * **Forms:** Round bars, flat bars, squares. Round bars are the most common form. * **Sizes:** Available in a wide range of diameters and thicknesses, typically from 6mm (0.25") up to 300mm (12") or more, depending on the mill. * **Marking:** Bars are typically bundle-tagged with heat number, grade (1084), size, and applicable standard. **Disclaimer:** This data sheet is for informational purposes only. Properties, especially in the as-rolled condition, are highly variable and not guaranteed. The material is intended for further processing. Users must conduct their own tests and specify final heat treatment parameters for their specific application. Proper safety procedures must be followed during handling, hot working, and machining. -:- For detailed product information, please contact sales. -: AISI 1084 Steel, Hot Rolled Bar (UNS G10840) Specification Dimensions Size： Diameter 20-1000 mm Length <5126 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 1084 Steel, Hot Rolled Bar (UNS G10840) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1084 Steel Wire, Hot Rolled Bar (UNS G10840) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1084 Steel Wire, Hot Rolled Bar (UNS G10840) -:- For detailed product information, please contact sales. -:

Packing of AISI 1084 Steel Wire, Hot Rolled Bar (UNS G10840) -:- 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 Wire 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 1597 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