JIS SPHE Nonresulfurized Carbon Steel Sheet,Plate

JIS SPHE Nonresulfurized Carbon Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: JIS SPHE Nonresulfurized Carbon Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

JIS SPHE Nonresulfurized Carbon Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Name:** JIS SPHE Nonresulfurized Carbon Steel, Hot Rolled (Extra Deep Drawing Quality) **Overview** JIS SPHE is the highest formability grade within the JIS G 3131 series of commercial hot-rolled, nonresulfurized carbon steels. The "E" designation signifies **Extra Deep Drawing** quality, representing steel engineered for the most severe cold-forming operations. SPHE offers exceptional and highly consistent ductility, low yield strength, and superior drawing performance, making it the material of choice for manufacturing complex, deeply drawn components where forming reliability and surface integrity are paramount. It is characterized by extremely tight control over chemistry, microstructure, and mechanical properties to ensure predictable behavior under high strain. **Key International Standards & Designation** * **Primary Standard:** **JIS G 3131:2022** - Hot-rolled mild steel plate, sheet and strip. * **Grade Designation:** **SPHE** * **S:** Steel (Kō). * **P:** Plate (板, Ita). * **H:** Hot rolled (熱間圧延, Nekkan Atsuen). * **E:** **Extra Deep Drawing** quality. * **Quality Hierarchy:** SPHE sits at the top of the formability pyramid in this standard, above SPHD (Drawing) and SPHC (Commercial). It is produced under the most stringent controls. * **Common International Equivalents:** * **ASTM:** **A621** (Drawing Quality Special Killed, Hot-Rolled Sheet). Also comparable to **SAE 1008** with extra deep drawing controls. * **DIN/EN:** **DC04** (cold-rolled equivalent) or **DD13** (hot-rolled, deep drawing quality). * **GB/T:** **SPHE** (directly adopted) or **08Al** (Aluminum-killed for deep drawing). * **ISO:** **CR4 / HR4** (forming and deep drawing qualities). **Chemical Composition (Ladle Analysis, % by weight, typical/guaranteed for SPHE)** Ultra-clean and tightly controlled for maximum formability and non-aging characteristics. * **Carbon (C):** **≤ 0.08%** (Very low to maximize ductility and minimize aging). * **Manganese (Mn):** **≤ 0.45%** (Low and tightly controlled). * **Phosphorus (P):** **≤ 0.030%** (Very low to prevent cold work embrittlement). * **Sulphur (S):** **≤ 0.030%** (Very low for excellent edge ductility and surface quality – "nonresulfurized" at its best). * **Aluminum (Alt):** **≥ 0.020%** (Mandatory for **Aluminum Killing**, which ensures a fully deoxidized, fine-grained, and non-aging steel. This is a key differentiator). * **Nitrogen (N):** Tightly controlled, often with Al-N stabilization. * **Note:** SPHE is typically **Aluminum-Killed (AK)** and may be **stabilized** (e.g., with Ti or Nb) to completely eliminate strain aging, ensuring a smooth, stretcher-strain-free surface after forming. **Physical & Mechanical Properties (Typical for hot-rolled, extra deep drawing quality)** While not strictly mandated by JIS, SPHE is always supplied with **agreed and guaranteed mechanical properties** essential for tooling design and production consistency. * **Yield Strength (YP):** **≈ 140 - 200 MPa** (Very low and consistent to minimize springback and forming force). * **Tensile Strength (TS):** **≈ 270 - 330 MPa**. * **Elongation (El):** **≥ 38% - 45%** (High guaranteed minimum is standard). * **r-value (Plastic Strain Ratio):** **Typically ≥ 1.4 (average)**. A high r-value indicates excellent deep drawing capability, as it resists thinning in the thickness direction. * **n-value (Strain Hardening Exponent):** **Typically ≥ 0.20**. A good n-value ensures the steel work-hardens uniformly during stretching, distributing strain effectively. * **Hardness (HRB):** **≈ 45 - 60**. **Product Features** 1. **Exceptional Deep Drawability:** The core feature. High r-value and elongation allow for the production of very deep, complex parts (e.g., oil pans, sink bowls) without splitting. 2. **Superior Surface Quality:** As a fully killed, stabilized steel, it is free from **stretcher strains (Lüders lines)** and **fluting**, resulting in a smooth, defect-free appearance on formed parts, ideal for painted or exposed surfaces. 3. **Low and Consistent Yield Strength:** Minimizes springback and ensures uniform forming behavior across the coil, critical for automated press lines. 4. **Non-Aging Stability:** The aluminum killing and optional stabilization lock in interstitial nitrogen, preventing the increase in yield strength and loss of ductility over time (strain aging), which is crucial for parts stored after forming. 5. **Excellent Weldability and Coatability:** The ultra-low carbon content allows for flawless welding. The clean, homogeneous surface is ideal for painting, plating, or galvanizing. **Typical Applications** SPHE is specified for the most demanding forming applications across industries. * **Automotive:** **Oil pans, fuel tanks, complex structural reinforcements, deep-drawn door inners, and seat components**. * **Appliances:** **Washing machine drums (inner tubs), dishwasher tubs, refrigerator liners, and oven cavities**. * **HVAC & Ductwork:** **Complex fittings, plenums, and air handling unit housings**. * **Containers & Packaging:** **Deep-drawn canister bodies, pressure vessels for aerosols, and specialty containers**. * **General Engineering:** **Any component requiring a deep draw, severe stretch-forming, or a combination of complex forming operations.** **Available Forms & Processing** * **Forms:** Primarily supplied as **hot-rolled sheet and strip in coils**, which are often subsequently pickled. Also available as cut lengths. * **Surface Condition:** **Hot-rolled with mill scale**. It is the **premium feedstock for pickling lines** to produce high-quality Pickled & Oiled (PO) or Hot-Rolled Annealed (HRA) material for critical press shops. * **Processing:** **Optimized for severe cold forming:** deep drawing, stretch forming, ironing, and complex stamping. Excellent for all welding processes. --- **Critical Selection & Procurement Note** * **Application-Specific:** Use SPHE only when SPHD is insufficient. Its premium cost is justified by enabling complex geometries, reducing scrap rates, and ensuring surface quality in severe forming applications. * **Guaranteed Properties are Essential:** Procurement must include **agreed minimums for Yield Strength, Tensile Strength, Elongation, and often r-value and n-value**. These are critical for Finite Element Analysis (FEA) and die design. * **Specify "Stabilized":** For exposed parts requiring a perfect surface, always specify **"Aluminum-Killed and Stabilized" SPHE**. * **Not a Structural Material:** It is a forming steel, not a strength steel. Never use it for structural load-bearing purposes. * **Supply Chain:** Often produced by integrated mills with advanced metallurgical controls. Early engagement with the technical sales team is recommended to align property targets with production capabilities. * **Procurement Specification:** Example: **"JIS G 3131 SPHE, AK & Stabilized, t=1.2mm. Guaranteed: YP ≤ 180 MPa, TS 280-320 MPa, El ≥ 40%, r-bar ≥ 1.5."** -:- For detailed product information, please contact sales. -: JIS SPHE Nonresulfurized Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5847 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 SPHE Nonresulfurized Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SPHE Nonresulfurized Carbon Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SPHE Nonresulfurized Carbon Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of JIS SPHE Nonresulfurized Carbon Steel Sheet/Plate -:- 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 2318 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