AISI 1552 Steel Sheet,Plate,UNS G15520

AISI 1552 Steel Sheet/Plate, Hot Rolled Bar (UNS G15520) Product Information -:- For detailed product information, please contact sales. -: AISI 1552 Steel Sheet/Plate, Hot Rolled Bar (UNS G15520) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1552 Steel, Hot Rolled Bar (UNS G15520) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1552 Steel, Hot Rolled Bar (UNS G15520)** **Overview** AISI 1552 (UNS G15520) is a high-carbon, high-manganese alloy steel supplied in the economical **hot rolled bar** condition. As a prominent member of the "15xx" series of **manganese alloy steels**, it is characterized by a significantly elevated manganese content (1.20-1.50%) combined with a high carbon level, positioning it as a grade with exceptional hardenability and very high strength potential. This composition is engineered to provide superior performance over plain carbon steels (e.g., 1052, 1055) by enabling deep and uniform hardening in substantial cross-sections. Supplied in the as-rolled state, it serves as a versatile and cost-effective raw material for demanding components that will undergo forging, machining, and subsequent heat treatment (normalizing, quenching & tempering), particularly suited for applications requiring maximum strength, good wear resistance, and toughness in heavy-duty service. **Key Features & Advantages** * **Exceptional Hardenability & High Strength:** The synergistic effect of high carbon and manganese provides deep hardenability, enabling effective through-hardening of large cross-sections to achieve very high tensile and yield strength after proper heat treatment. * **Good Wear and Abrasion Resistance:** In the hardened and tempered condition, it offers good resistance to surface wear, making it suitable for components in sliding or rolling contact under high stress. * **Good Toughness for its Strength Level:** When properly tempered, it achieves a favorable balance of strength and impact resistance, which is crucial for components subject to dynamic or shock loading in industrial and off-highway applications. * **Excellent Forgeability:** Highly suitable for hot forging into complex shapes. The manganese improves high-temperature workability and contributes to good final forged properties. * **Cost-Effective Ultra-High-Strength Material:** Provides a performance level that can approach that of some low-alloy steels (e.g., 4150) at a typically lower material cost, making it an economical choice for many heavy-duty, wear-intensive applications. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.47 – 0.55 | **High carbon content.** Primary source of hardness, strength, and wear resistance. Enables formation of high-carbon martensite upon quenching. | | **Manganese (Mn)** | 1.20 – 1.50 | **Primary Alloying Element.** Dramatically increases hardenability, ensuring deep and uniform hardening. Contributes significantly to strength and promotes a fine grain structure. | | **Phosphorus (P)** | ≤ 0.040 (max) | Residual element, kept very low to maintain toughness. | | **Sulfur (S)** | ≤ 0.050 (max) | Residual element, kept low. **This is not a free-machining steel.** | | **Silicon (Si)** | 0.15 – 0.35 | Deoxidizer; contributes to strength. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G15520 * **AISI/SAE:** 1552 * **ASTM:** A29 (Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought) * **ASTM:** A519 (for mechanical tubing) * **DIN (Germany):** ~1.1213 / C55 (approximate, but with much lower Mn; no direct equivalent) * **EN (Europe):** No direct equivalent. * **JIS (Japan):** No direct equivalent; similar to a higher-carbon, higher-manganese version of SMn443. --- ### **2. Typical Physical & Mechanical Properties (Hot Rolled, As-Rolled Condition)** *Note: These are typical properties in the as-supplied state. Final service properties are developed through heat treatment.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Tensile Strength** | 680 – 850 MPa (99 – 123 ksi) | | **Yield Strength (0.2% Offset)** | 430 – 620 MPa (62 – 90 ksi) | | **Elongation (in 50mm)** | 14% – 20% | | **Reduction of Area** | 35% – 50% | | **Brinell Hardness (HB)** | 210 – 270 | | **Machinability (As-Rolled)** | **Very Poor (~25-30% of AISI 1212).** Machining in this state is extremely difficult; normalizing or annealing prior to any significant machining is **essential**. | | **Surface Condition** | Standard hot-rolled finish with mill scale. | --- ### **3. Product Applications** AISI 1552 hot rolled bars are used for ultra-high-strength, wear-resistant components across heavy industries. * **High-Stress Shafts and Axles:** Drive shafts, axle shafts, transmission shafts, and roller shafts in heavy machinery that will be through-hardened for maximum strength and fatigue resistance. * **Forged Components:** Crankshafts, connecting rods, lever arms, and other high-strength forged parts requiring a combination of toughness and strength. * **Wear-Resistant Parts:** Plow shares, scraper blades, bucket teeth, crusher liners, mill hammers, and other mining/agricultural components subject to severe abrasion. * **Gears and Sprockets:** Heavy-duty gears and sprockets that are through-hardened for wear resistance where case hardening is not required. * **High-Strength Fasteners and Pins:** Very large bolts, studs, and pins requiring extreme tensile strength, often used in construction, mining, and energy sectors. * **General High-Wear Machine Parts:** Wear plates, mandrels, and other components requiring high hardness and good core strength. --- ### **4. Critical Considerations** * **Not a Free-Machining Steel:** Contains low sulfur. Machining in the as-rolled state is **prohibitively difficult**. **Normalizing or full annealing prior to any machining is mandatory** for practical production. * **Heat Treatment is Mandatory for Service:** This steel derives its value from heat treatment. It requires quenching & tempering to achieve its ultra-high-strength properties. **Immediate and proper tempering after quenching is absolutely critical** to relieve stresses, prevent cracking, and develop required toughness. * **High Quenching Sensitivity:** Due to its high carbon content, it is **highly susceptible to quench cracking**. Proper quenchant selection (typically oil), controlled agitation, and favorable part geometry are vital. * **Toughness Consideration:** While strong and hard, its impact toughness is limited compared to alloy steels like 4140 or 4340 at similar hardness levels. It is best suited for applications dominated by **compressive loads, abrasion, and controlled stress** rather than severe, unconstrained impact. * **Weldability:** **Very Poor. Not recommended for welding.** If absolutely unavoidable, it requires extensive preheating (350-450°C / 660-840°F), low-hydrogen electrodes, stringent interpass temperature control, and a controlled post-weld heat treatment (PWHT) cycle. The risk of cracking is very high. * **Comparison to 1052/1055:** AISI 1552 offers vastly superior hardenability and strength. * **Comparison to 1547/1551:** Very similar in performance; often considered part of a group of closely related high-carbon, high-manganese grades (1547, 1548, 1551, 1552) with minor variations in carbon/manganese ranges. Selection among them is often based on mill availability and specific hardenability requirements. * **"H" Grade Availability:** An **AISI 1552H** grade exists for applications requiring guaranteed hardenability bands (SAE J1268), ensuring predictable heat treatment results for critical components. --- **Disclaimer:** **AISI 1552 is a specialized, high-performance steel that requires expert knowledge in heat treatment and machining.** The information provided is based on standard specifications. Actual properties may vary. This material is not suitable for general fabrication. For engineering applications, always consult certified material test reports and conduct thorough process validation. The as-rolled condition is suitable only for hot working or as stock for controlled thermal and mechanical processing. -:- For detailed product information, please contact sales. -: AISI 1552 Steel, Hot Rolled Bar (UNS G15520) Specification Dimensions Size： Diameter 20-1000 mm Length <5050 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 1552 Steel, Hot Rolled Bar (UNS G15520) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1552 Steel Sheet,Plate, Hot Rolled Bar (UNS G15520) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1552 Steel Sheet,Plate, Hot Rolled Bar (UNS G15520) -:- For detailed product information, please contact sales. -:

Packing of AISI 1552 Steel Sheet/Plate, Hot Rolled Bar (UNS G15520) -:- 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 Sheet/Plate 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 1521 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