AISI 1151 Steel, Cold Draw,UNS G11510

AISI 1151 Steel, Cold Drawn Bar (UNS G11510) Product Information -:- For detailed product information, please contact sales. -: AISI 1151 Steel, Cold Drawn Bar (UNS G11510) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1151 Steel, Cold Drawn Bar (UNS G11510) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1151 / UNS G11510 Cold Drawn Steel Bar** **Overview** AISI 1151 (UNS G11510) is a medium-carbon manganese steel supplied in a **cold drawn** condition. This process transforms hot-rolled stock by pulling it through precision dies at room temperature, resulting in a product with superior dimensional accuracy, a bright, smooth surface finish, and enhanced mechanical properties via strain hardening. Unlike resulfurized grades, AISI 1151 is a **"straight" carbon-manganese steel** with low sulfur content, offering a unique combination of good hardenability, improved strength from cold work, excellent surface quality, and better weldability/formability than free-machining steels. It is engineered for applications requiring precision, strength, and a reliable foundation for subsequent heat treatment or direct use in a strengthened state. **Key Features & Advantages** * **Enhanced Strength and Hardness:** The cold drawing process significantly increases yield and tensile strength over the hot-rolled condition, providing a stronger, ready-to-machine material. * **Superior Dimensional Precision and Surface Quality:** Offers tight diameter tolerances (per ASTM A108), excellent straightness, and a bright, scale-free surface. This reduces machining allowances and secondary finishing. * **Good Hardenability:** The elevated manganese content (0.70-1.00%) ensures good response to through-hardening (quenching & tempering), allowing effective heat treatment of finished parts. * **Good Weldability and Formability:** The low sulfur and phosphorus content (<0.05%) makes it suitable for welding (with proper procedures) and offers better cold formability than resulfurized steels. * **Predictable Machining:** Provides a uniform, consistent material structure for stable machining operations, though at lower speeds than free-machining grades. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.48 – 0.55 | Provides core strength, hardness, and hardenability. | | **Manganese (Mn)** | 0.70 – 1.00 | **Key feature.** Enhances hardenability and strength significantly. | | **Phosphorus (P)** | ≤ 0.040 (max) | Residual element kept low to maintain toughness. | | **Sulfur (S)** | ≤ 0.050 (max) | **Low level.** Ensures good ductility (especially transverse), weldability, and forging characteristics. Distinguishes it from 11xx free-machining steels. | | **Silicon (Si)** | 0.15 – 0.35 | Deoxidizer; contributes to strength. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G11510 * **AISI/SAE:** 1151 * **ASTM:** **A108** (Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished) * **ASTM:** A29 (General Requirements) * **DIN (Germany):** 1.0535 / C55 (approximate equivalent) * **EN (Europe):** 1.0535 / C55 (approximate equivalent) * **JIS (Japan):** S55C (approximate equivalent) --- ### **2. Typical Physical & Mechanical Properties (Cold Drawn Condition)** *Note: Properties reflect the significant effect of strain hardening from cold drawing. Material is often used in this state or further heat-treated.* | Property | Cold Drawn (Typical) | Notes | | :--- | :--- | :--- | | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | | **Modulus of Elasticity** | 200 - 210 GPa (29,000 – 30,500 ksi) | | | **Machinability** | **Fair (Approx. 60-65% of 1212)** | Lower than resulfurized grades due to lack of chip-breaking inclusions. Requires robust tooling. | | **Tensile Strength** | 700 – 850 MPa (102 – 123 ksi) | Increased via cold work. | | **Yield Strength (0.2% Offset)** | **585 – 760 MPa (85 – 110 ksi)** | **Key benefit of cold drawing.** | | **Elongation (in 50mm)** | 10% – 15% | Reduced from hot-rolled state due to strain hardening. | | **Brinell Hardness (HB)** | 201 – 255 | | | **Surface Roughness (Ra)** | 1.6 – 3.2 μm (63 – 125 μin) | Smooth, bright finish. | | **Tolerances** | ASTM A108 Cold Drawn | Tight, precision tolerances. | --- ### **3. Product Applications** AISI 1151 cold drawn bars are specified for precision components that require a combination of inherent strength, good surface finish, and the potential for heat treatment. * **Precision Shafts and Pins:** Axle shafts, spindle shafts, dowel pins, and guide rods requiring straightness, strength, and a smooth bearing surface. * **Hydraulic and Pneumatic Components:** Piston rods, cylinder rods, and valve parts where surface finish and strength are critical for sealing and wear resistance. * **Fasteners and Studs:** High-strength bolts, studs, and pins that may be machined and then heat-treated. * **General Machinery Parts:** Gears, rollers, couplings, and bushings that are machined from bar stock and often surface hardened or through-hardened. * **Automotive Components:** Chassis parts, steering components, and other stressed members that benefit from cold drawn precision and strength. * **Tooling and Fixture Components:** Parts requiring good dimensional stability and a strong base material. --- ### **4. Important Considerations** * **Residual Stress:** Cold drawing introduces residual surface stresses. For parts undergoing complex or asymmetric machining, **stress-relieving heat treatment prior to final machining is recommended** to prevent distortion. * **Machinability:** Not a free-machining steel. Machining requires appropriate tool grades, geometries, and coolants. Annealing may be specified if extensive machining is needed. * **Weldability:** **Weldable with proper procedures** (preheat, low-hydrogen electrodes, post-weld heat treatment for critical applications), unlike resulfurized grades. However, the carbon content requires caution to avoid cracking. * **Further Processing:** Often used as a premium starting material for parts that will be: * **Heat Treated:** Quenched & Tempered for highest strength. * **Surface Hardened:** Flame or induction hardened for wear resistance. * **Annealed:** To soften for severe cold forming. * **Comparison to 1144 Cold Drawn:** 1151 CD offers better weldability and through-hardenability but lower machinability. 1144 CD offers better machinability and higher "as-drawn" yield strength but is not weldable. -:- For detailed product information, please contact sales. -: AISI 1151 Steel, Cold Drawn Bar (UNS G11510) Specification Dimensions Size： Diameter 20-1000 mm Length <5001 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 1151 Steel, Cold Drawn Bar (UNS G11510) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1151 Steel, Cold Drawn Bar (UNS G11510) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1151 Steel, Cold Drawn Bar (UNS G11510) -:- For detailed product information, please contact sales. -:

Packing of AISI 1151 Steel, Cold Drawn Bar (UNS G11510) -:- 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 1472 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