JIS S20CK Carbon Steel Capillary

JIS S20CK Carbon Steel Capillary Product Information -:- For detailed product information, please contact sales. -: JIS S20CK Carbon Steel Capillary Synonyms -:- For detailed product information, please contact sales. -:

JIS S20CK Carbon Steel Product Information -:- For detailed product information, please contact sales. -: ## **Product Introduction: JIS S20CK Special Quality Carbon Steel for Carburizing** **JIS S20CK** is a **special quality carbon steel** grade specified by the Japanese Industrial Standards (JIS) system. The **"K" suffix** (from the Japanese "Kōzō" - structure) indicates it is a **steel for carburizing**, characterized by more stringent control over chemical composition and hardenability compared to the standard S20C grade. This steel is specifically designed and optimized for **case hardening processes**, primarily carburizing or carbonitriding. Its carefully balanced composition ensures the formation of a deep, hard, and wear-resistant surface layer after carburizing and quenching, while maintaining a tough and ductile core to withstand impact and fatigue loads. S20CK is typically supplied in a normalized or hot-rolled condition to facilitate machining prior to the final heat treatment. --- ### **1. Chemical Composition (JIS G 4051 & G 4106 Reference)** The composition is defined with tighter controls than standard grades. While JIS G 4051 covers it, its use aligns with the spirit of special-quality steels. Key ranges are as follows (in weight %): | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | **Key Difference** | | :------------- | :--------- | :----------- | :------------- | :------------- | :--------- | :----------------- | | **S20CK Content** | 0.18-0.23 | 0.15-0.35 | **0.60-0.90** | **≤ 0.025** | **≤ 0.025** | Tighter P,S control & higher Mn. | | *vs. S20C* | Same | Same | *0.30-0.60* | *≤ 0.030* | *≤ 0.035* | | **Critical Features of the Composition:** * **Higher Manganese (Mn):** Enhances **hardenability**, ensuring a more consistent and deeper hardened case after quenching, especially for components with thicker cross-sections. * **Lower Phosphorus (P) & Sulfur (S):** Reduced impurity levels minimize the risk of segregation and improve **ductility and impact toughness** of the core material. * **Guaranteed Hardenability:** S20CK is often supplied with a **hardenability band guarantee** (similar to the AISI H-band system), ensuring predictable and consistent results in heat treatment. --- ### **2. Physical & Mechanical Properties** Properties are highly dependent on the final heat treatment cycle. Values below are for the **supplied (normalized) condition** and the **final case-hardened state**. **A. Supplied (Normalized/Hot-Rolled) Condition:** * **Tensile Strength (σb):** 430 - 550 MPa * **Yield Strength (σ0.2):** ≥ 255 MPa * **Elongation (δ):** ≥ 23% * **Hardness:** 121 - 156 HB * **Machinability:** Good in the normalized state. **B. After Case Hardening (e.g., Carburizing, Quenching & Tempering):** * **Surface (Case) Hardness:** **58 - 63 HRC** (typical carburized & quenched hardness). * **Effective Case Depth:** Variable (typically 0.5mm - 2.0mm), controllable via process parameters. * **Core Hardness:** **25 - 40 HRC** (provides strong support for the hard case). * **Core Properties:** Maintains good tensile strength (700-900 MPa range) and high impact toughness. --- ### **3. Product Applications** JIS S20CK is the material of choice for high-performance, **case-hardened components** subjected to wear, rolling contact, and dynamic loads. Its predictable behavior makes it essential for automotive and heavy machinery. * **Automotive & Truck Components:** **Gears** (transmission, differential), **spline shafts**, **camshafts**, **piston pins**, **kingpins**, and **bearing races**. * **Heavy Machinery:** Sprockets, roller bearings, track links, and heavy-duty pins and bushings. * **Agricultural Equipment:** Transmission gears, drive axle components, and tiller parts. * **General High-Stress Parts:** Any component requiring an extremely hard, wear-resistant surface combined with a shock-absorbing core. --- ### **4. International & Equivalent Standards** The "CK" designation aligns with international special-quality carburizing steel standards that guarantee hardenability. | Standard System | Equivalent Grade | Condition / Remark | | :-------------- | :--------------- | :----------------- | | **JIS** | **S20CK** | Primary standard (Special quality for carburizing). | | **ASTM/AISI** | **1022H** | The closest direct equivalent. The **"H"** suffix denotes guaranteed hardenability, matching the purpose of S20CK. | | **SAE** | SAE 1022H | Same as AISI. | | **DIN (EN)** | 1.1167 (C22R / Cf22) | European quality steel for case hardening. | | **ISO** | ISO 683-11: Type 1 | International standard for case-hardening steels. | | **GB (China)** | 20CrH (Approx.) | Chinese equivalent with similar application, though may contain trace chromium. | **Crucial Note:** While standard grades like AISI 1020/1022 are similar in composition, **S20CK's guaranteed hardenability makes it distinct.** For critical applications, specifying the "H"-grade or "CK" designation is mandatory to ensure consistent heat treatment results. --- ### **5. Key Advantages & Considerations** **Advantages:** * **Optimized for Carburizing:** Chemistry and hardenability are tailored for superior case depth, hardness, and core properties. * **Consistent Heat Treatment Response:** Guaranteed hardenability band minimizes batch-to-batch variation in final part performance. * **Excellent Core Toughness:** Provides outstanding fatigue and impact resistance under the hardened case. * **Good Machinability in Supplied State:** Allows for precision machining before final hardening. **Considerations:** * **Cost:** Premium over standard S20C due to tighter chemical controls and testing. * **Requires Final Heat Treatment:** Components are not ready for use in the supplied state; a full carburize-quench-temper cycle is mandatory. * **Distortion Management:** Like all case-hardening processes, part distortion during quenching must be accounted for in design and machining. --- **Disclaimer:** The information provided is for general reference and selection purposes. For engineering design and heat treatment specification, always consult the official material data sheets from the steel producer and engage with qualified heat treatment specialists. The final properties are a direct result of the specific carburizing and quenching parameters used. -:- For detailed product information, please contact sales. -: JIS S20CK Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5062 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 S20CK Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS S20CK Carbon Steel Capillary -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS S20CK Carbon Steel Capillary -:- For detailed product information, please contact sales. -:

Packing of JIS S20CK Carbon Steel Capillary -:- 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 Capillary 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 1533 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