JIS S55C Steel Wire

JIS S55C Steel Wire, Tempered Product Information -:- For detailed product information, please contact sales. -: JIS S55C Steel Wire, Tempered Synonyms -:- For detailed product information, please contact sales. -:

JIS S55C Steel, Tempered Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: JIS S55C Carbon Steel (Tempered)** **JIS S55C** is a medium-high carbon steel grade standardized by the Japanese Industrial Standards (JIS). In its **tempered** condition (quenched and high-temperature tempered), it is widely recognized for its excellent combination of high strength, good toughness, and fair machinability. The "S" denotes "Steel," "55" indicates an average carbon content of 0.55%, and "C" stands for Carbon steel. The quenching and tempering heat treatment process transforms S55C, enhancing its core mechanical properties. It achieves a tempered martensitic microstructure, providing a superior balance of strength and ductility compared to its normalized or annealed states. This makes it a versatile and cost-effective choice for a broad range of structural and mechanical components requiring durability and wear resistance. --- ### **1. Chemical Composition (JIS G 4051 Standard)** The composition is defined by JIS G 4051 (Carbon steels for machine structural use). Key elements are as follows (in weight %): | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | 0.52 - 0.58 | 0.15 - 0.35 | 0.60 - 0.90 | ≤ 0.030 | ≤ 0.035 | * **Note:** The balanced composition, with controlled impurities (P, S), ensures good hardenability and a reliable response to heat treatment. --- ### **2. Physical & Mechanical Properties (Typical Values for Tempered Condition)** Properties can vary based on the specific quenching medium (oil/water) and tempering temperature. The following are typical ranges for oil-quenched and tempered S55C. * **Tensile Strength (σb):** 700 - 850 MPa * **Yield Strength (σ0.2):** ≥ 450 MPa * **Elongation (δ):** ≥ 17% * **Reduction of Area (ψ):** ≥ 45% * **Hardness:** 217 - 269 HB (Approx. 20 - 28 HRC) * **Impact Toughness (Charpy):** ~ 40 - 60 J (value depends heavily on tempering temperature) * **Modulus of Elasticity (E):** ~ 205 - 210 GPa * **Density:** 7.85 g/cm³ **Heat Treatment (Typical):** * **Quenching:** Austenitizing at ~830°C - 850°C, followed by oil cooling. * **Tempering:** Typically performed in the range of 550°C - 650°C to achieve the desired strength-toughness balance. --- ### **3. Product Applications** JIS S55C in its tempered condition is ideal for components that require high strength, good fatigue resistance, and moderate wear resistance. Common applications include: * **Automotive Components:** Crankshafts, axle shafts, connecting rods, gears, and bolts. * **General Machinery:** Spindles, shafts, pins, keys, and couplings. * **Construction & Agricultural Equipment:** High-strength bolts, pivot shafts, and linkage parts. * **Tools & Dies:** Jigs, fixtures, and die bases where high rigidity is needed. * **Industrial Hardware:** Forklift tines, hydraulic cylinder rods (for lower-pressure applications), and other stressed components. --- ### **4. International & Equivalent Standards** JIS S55C has close equivalents in many international standards systems. | Standard System | Equivalent Grade | Condition | Remark | | :--- | :--- | :--- | :--- | | **JIS** | **S55C** | Tempered (QT) | Primary standard | | **ASTM/AISI** | 1055 | Similar composition, properties may vary with heat treatment. | | | **DIN (EN)** | 1.1203 (C55E / C55R) | European equivalent with very similar specs. | | | **ISO** | ISO 683-18: Type 1.1200 | International approximate equivalent. | | | **GB (China)** | 55# Steel | Very close equivalent. | | | **KS (Korea)** | KS S55C | Directly equivalent. | | **Note:** While chemical compositions are very similar, precise mechanical property specifications and recommended heat treatment cycles may differ between standards. It is crucial to refer to the specific standard required for the application. --- ### **5. Key Advantages & Considerations** **Advantages:** * **Excellent Strength-to-Price Ratio:** Offers high performance at a relatively low material cost. * **Good Hardenability:** Suitable for oil quenching, reducing the risk of distortion and cracking compared to water-quenching steels. * **Machinability:** Fair machinability in the tempered condition, better than in the hardened state. * **Weldability:** Can be welded with pre-heating and post-heating procedures, though it is not typically recommended for critical welded structures. **Considerations:** * **Not a Stainless Steel:** Requires surface protection (coating, plating) to prevent corrosion. * **Heat Treatment Essential:** To achieve the described properties, proper quenching and tempering are mandatory. * **Not for Extreme Wear/Impact:** For applications requiring extreme wear resistance or impact toughness, alloy steels (e.g., SCM, SNCM series) are more appropriate. --- **Disclaimer:** The information provided is for general reference purposes. Actual material properties are dependent on the specific manufacturing process, heat treatment parameters, and section size of the final product. For critical applications, always consult the official material data sheets and engage with qualified metallurgical engineers. -:- For detailed product information, please contact sales. -: JIS S55C Steel, Tempered Specification Dimensions Size： Diameter 20-1000 mm Length <5060 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. -: JIS S55C Steel, Tempered Properties -:- For detailed product information, please contact sales. -:

Applications of JIS S55C Steel Wire, Tempered -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS S55C Steel Wire, Tempered -:- For detailed product information, please contact sales. -:

Packing of JIS S55C Steel Wire, Tempered -:- 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 1531 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