Cold-rolled Commercial Quality grade steels are manufactured as low-carbon steels and have tensile strength of more than 270MPa. They are most widely used for automotive inner parts for general drawing processing. Products are CR, EG, GI and GA.
Steel Grade
JS-SPCC-S / JIS G3141
Size
1.6 x 1220 x C
1.5 x 1220 x C
2.0 x 1220 x C
This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.
Chemical Composition
| Specification | C(%) | Si(%) | Mn(%) | P(%) | S(%) |
|---|---|---|---|---|---|
| JS-SPCC-S / JIS-G3141 | ~0.0018 to ~0.0024 | ~0.001 to ~0.004 | ~0.089 to ~0.109 | ~0.0090 to ~0.0101 | ~0.0026 to ~0.0030 |
Mechanical Properties
| Specification | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| JS-SPCC-S / JIS-G3141 | 161~ to 168~ | 285~ to 293~ | 48~ to 53~ |
Powered by state-of-the-art facility and technology, it operates a totally computerized, end-to-end full automatic production system. This allows us to deliver high-quality and high-performance products fit to the needs of customers.
Pickling
Hot rolled coils pass through a pickling line, where scale breaker machines and hydrochloric acid solutions are used to remove any surface scale and/or oxide film that which causes surface flaws during the final stage of cold rolled steel processing.
Cold Rolling
The purpose of electrolytic cleaning is to remove lubricant oil and contaminants on the cold rolled steel prior to the annealing process.
Electrolytic Cleaning
This is a highly productive manufacturing method whereby steel products with extra deep drawing qualities and high tensile strength can be produced. Two annealing methods are commonly used: batch annealing and continuous annealing.
Annealing
This final rolling process is performed in order to remove minor surface defects such as stretch marks and to produce a smooth, lustrous surface. Skin Pass results in a further thickness reduction of about 1%.
Skin Pass
Pickled coils are cold rolled in tandem mills to a specified thickness, typically 40 to 90%, of original material dimensions. Fully automated shape adjustment is ensured through state of the art process machinery.
