AISI 5160H Steel, normalized

AISI 5160H Steel, normalized, 13 mm (0.5 in.) round Product Information -:- For detailed product information, please contact sales. -: AISI 5160H Steel, normalized, 13 mm (0.5 in.) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 5160H Steel, normalized, 13 mm (0.5 in.) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: AISI 5160H Steel, Normalized Condition, 13 mm (0.5 in.) Round Bar** --- #### **1. Product Overview** This product is a **13 mm (0.5 inch) diameter round bar** of **AISI 5160H alloy steel**, supplied in the **normalized condition**. The **"H" suffix** designates this as a **hardenability-controlled steel**, manufactured to meet specific end-quench hardenability band requirements (SAE J1268). In the normalized state, this bar delivers a refined, uniform grain structure with optimized strength and machinability, while the guaranteed hardenability ensures exceptional consistency and predictability in final heat treatment response. This combination makes it a premium-grade material for precision, high-volume components where dimensional stability and repeatable performance are paramount. #### **2. Material & Condition Concept: Normalized "H" Grade Precision** - **Base Material (AISI 5160H):** A medium-carbon chromium steel where the **"H" designation guarantees** that the steel's hardenability falls within a strict, published range. This eliminates batch-to-batch variation in quenching behavior. - **Normalized Condition:** The steel has been reheated to approximately 870-900°C (1600-1650°F) and air-cooled. This process: 1. **Refines the microstructure** into a fine, uniform mixture of ferrite and pearlite. 2. **Enhances mechanical properties** over the as-rolled or annealed state, providing greater strength and better dimensional stability during machining. 3. **Creates an ideal, consistent starting condition** for final hardening, ensuring the guaranteed hardenability is fully realized. #### **3. International Standard & Specifications** - **Governing Standard:** **ASTM A304** - Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements. - **Material Reference:** **SAE J404** (Compositions) & **SAE J1268** (Hardenability Bands for 5160H). - **Condition Standard:** **ASTM A29/A29M** (for normalized bars). - **UNS Designation:** **H51600** - **Common Procurement Spec:** **ASTM A304, Grade 5160H, Normalized**. - **European/Japanese Equivalent:** No direct equivalent for the "H"-band system. The base material is similar to **1.7108 (55Cr3)** (EN) or **SCr440** (JIS) in normalized condition. #### **4. Chemical Composition (% by Weight, per SAE J1268 for 5160H)** *Note: Ranges are intentionally broader than standard 5160 to allow the steelmaker to adjust chemistry to hit the hardenability band.* | Element | Content Range (%) | Role in this Product | | :--- | :--- | :--- | | **Carbon (C)** | **0.55 – 0.65** | Primary hardening element; range is tuned to center the hardenability curve. | | **Manganese (Mn)** | **0.70 – 1.05** | Major hardenability enhancer; the primary variable for adjusting the "H" band. | | **Phosphorus (P)** | **≤ 0.035** | Impurity; kept low. | | **Sulfur (S)** | **≤ 0.040** | Impurity; kept low. | | **Silicon (Si)** | **0.15 – 0.35** | Deoxidizer; strengthens ferrite matrix. | | **Chromium (Cr)** | **0.60 – 1.00** | **Key Alloy.** Ensures hardenability and wear resistance; range secures band compliance. | | **Iron (Fe)** | **Balance** | Base metal. | #### **5. Physical & Mechanical Properties (As-Normalized, 13mm Round)** **A. Physical Properties:** - **Diameter:** 13.0 mm ± 0.25 mm (Precision tolerance typical for cold-drawn or turned normalized "H" grade bars). - **Straightness:** Excellent straightness, suitable for automated feeding. - **Surface Condition:** Typically supplied with a superior, clean surface—descaled, pickled & oiled, or precision turned to minimize decarburization and ensure dimensional accuracy. - **Density:** 7.85 g/cm³ **B. Mechanical Properties (Normalized State):** - **Hardness (Brinell):** **229 – 285 HBW** (Approx. **100 – 108 HRB / 22-30 HRC**) - **Tensile Strength:** **770 – 930 MPa** (112 – 135 ksi) - **Yield Strength (0.2% Offset):** **≥ 515 MPa** (75 ksi) - **Elongation in 50mm:** **≥ 14%** - **Machinability:** **Good.** Rating ~65%. The fine, uniform normalized structure allows for stable machining with good surface finish and predictable tool wear. **C. Guaranteed Hardenability (The Core "H" Property):** *The material is certified to meet the SAE J1268 hardenability band for 5160H. For a 13mm round, this guarantees that when fully austenitized and quenched, the entire cross-section will transform to a high-hardness martensitic structure with minimal variation, providing a uniform foundation for tempering.* #### **6. Key Characteristics & Value Proposition** - **Unmatched Heat Treatment Consistency:** The primary advantage. Guarantees identical depth and uniformity of hardening across all production lots, enabling streamlined and foolproof heat treat cycles. - **Optimized for Precision Machining:** The normalized state offers the best combination of strength and machinability for a "ready-to-harden" material. It is stiff enough to minimize deflection during machining, leading to tighter tolerances. - **Superior Quality Baseline:** "H" grades undergo more rigorous testing and process controls. The normalized condition further ensures a homogeneous, stress-relieved starting point. - **Risk Mitigation:** Eliminates the risk of under-hardened cores or soft spots in finished parts, a critical factor for safety-critical and high-stress applications. #### **7. Typical Applications for 13mm Normalized 5160H Round** This product is specified for high-precision, high-reliability components, especially in automated manufacturing: - **Precision Shafts & Axles:** Fuel injection pump shafts, precision instrument shafts, small gearbox shafts, and high-performance dowel pins. - **Automotive Safety Components:** Anti-roll bar links, steering rack components, and critical valve train parts. - **Fasteners:** High-strength, high-reliability bolts, studs, and pins for aerospace, automotive, and heavy machinery (e.g., ISO 898-1 Class 10.9/12.9 equivalents). - **Hydraulic & Pneumatic Components:** Spool valves, piston rods for compact cylinders, and actuator parts. - **Bearing Races & Components:** For specially designed bearings and wear-resistant sleeves. #### **8. Subsequent Processing Pathway** 1. **Finish Machining:** Perform all final machining operations in this stable, normalized state. The material is often used as the final "as-machined" condition before hardening. 2. **Hardening:** Austenitize at **830-850°C (1525-1560°F)**, then **oil quench**. The small diameter and guaranteed hardenability ensure complete and uniform through-hardening. 3. **Tempering:** Temper immediately within **400-540°C (750-1000°F)** to achieve the desired final hardness (typically **RC 45-52** for high-strength parts). 4. **Finishing:** Any final grinding, plating, or surface treatment. #### **9. Ordering & Certification Requirements** - **Specify:** **ASTM A304, Grade 5160H, Normalized, 13 mm (0.5 in.) Round**. - **Critical Documentation:** The supplier **must provide a Certified Material Test Report (CMTR)** including: 1. Chemical Analysis. 2. **Actual Jominy Hardenability Test Results** (Hardness vs. Jominy distance plot) verifying compliance with SAE J1268 for 5160H. 3. Mechanical properties from a normalized test coupon. - **Quality:** Expect superior surface finish and tighter controls on decarburization and non-metallic inclusions compared to standard grades. --- **Disclaimer:** The normalized properties are for processing. The material **must be quenched and tempered for service use.** The "H" designation guarantees the *hardenability*, enabling precise prediction of the *as-quenched* hardness. The final tempered properties are a function of the tempering cycle. This material is a premium choice for applications where performance consistency and manufacturing efficiency are critical. -:- For detailed product information, please contact sales. -: AISI 5160H Steel, normalized, 13 mm (0.5 in.) round Specification Dimensions Size： Diameter 20-1000 mm Length <5163 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 5160H Steel, normalized, 13 mm (0.5 in.) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 5160H Steel, normalized, 13 mm (0.5 in.) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 5160H Steel, normalized, 13 mm (0.5 in.) round -:- For detailed product information, please contact sales. -:

Packing of AISI 5160H Steel, normalized, 13 mm (0.5 in.) round -:- 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 1634 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