SPCC Steel: Production Process and Quality Standards

In the realm of cold-rolled steel, JIS G3141 SPCC stands as a symbol of excellence, combining commercial utility with high-quality standards. Let’s delve into the intricacies of SPCC steel, exploring its composition, equivalent grades, and the meticulous production process that transforms raw materials into a finished product of unparalleled quality.

What is SPCC Steel? What is the production process?

1. What is SPCC-SD / SB?

SPCC, denoting Steel Plate Cold rolled Commercial, embodies a commitment to excellence. ‘SD’ signifies Standard Temper Grade, while ‘SB’ delineates between Dull Finish and Bright Finish, offering versatility for various applications.

2. Equivalent grade of JIS G3141 and SPCC steel

Understanding the equivalency is crucial. SPCC finds its counterparts in various international standards: ASTM, BS1449, and DIN 1623. Noteworthy equivalents include A366 (CR4) in ASTM, ST12 in BS1449, and SPCC in DIN 1623.

3. Chemical Composition of SPCC

The chemical composition is the bedrock of SPCC’s quality. With a maximum carbon content of 0.15%, manganese at 0.60%, phosphorous at 0.10%, and sulfur at 0.05%, SPCC sets a standard that ensures robustness and durability.

4. Chemical Composition of JIS G3141 Steel and SPCC

Comparing the chemical composition of SPCC with the broader JIS G3141 steel grades reveals SPCC’s prowess. Maintaining a fine balance, SPCC excels with 0.15% carbon, 0.60% manganese, 0.10% phosphorous, and 0.05% sulfur.

5. Mechanical Properties of SPCC Steels

Beyond composition, understanding the mechanical properties is paramount. SPCC steels boast exceptional mechanical strength, ensuring they meet the rigorous demands of commercial applications.

6. Mechanical Properties of JIS G3141 Steel and SPCC

Drawing a detailed comparison of the mechanical properties between SPCC and JIS G3141 steel grades further solidifies SPCC’s standing as a premium choice for discerning applications.

What is the production process of SPCC cold rolled steel coil?

1. Iron surface cleaning process

Initiating with raw material preparation, the iron surface cleaning process employs a descaling line. Hydrochloric acid cleanses hot-rolled coils, removing the oxide layer and preparing the material for the subsequent cold rolling stage.

2. Cold rolling process

XINO Steel’s cold rolling equipment, featuring four continuous rolling lines, ensures precise control over thickness and flatness. The automatic control system guarantees synchronized tension between frames, contributing to stable processes and superior product quality.

3. Soft Annealing Stage

Post-cold rolling, the steel coil undergoes a soft annealing stage. This crucial step rebuilds the grain structure, achieving complete mechanical properties and a bright surface. Operating in a 100% hydrogen-protected coil environment enhances the annealing rate, reducing post-rolling hardening and elevating toughness.

4. Inspection and control of production process

Quality is non-negotiable at XINO Steel. At every stage of production, stringent checks and balances ensure the geometry and surface state of each coil meet exacting standards. The quality control department, in tandem with the inspection department, conducts thorough assessments, assuring clients of the highest quality before the product leaves the factory.

In conclusion, the journey from raw materials to the finished SPCC steel coil epitomizes precision, excellence, and a commitment to quality. XINO Steel’s unwavering dedication to meticulous processes and stringent quality control positions SPCC as the epitome of high-grade cold-rolled steel in the global market.

Note: The diagram illustrates the sequential steps in the production process, highlighting the key stages that contribute to the superior quality of SPCC steel.