Commercial Steel (CS) Type B

Commercial Steel (CS) Type B is a low-carbon steel used in many automotive applications where simple bending or moderate forming is required.  This grade can be bent flat on itself in any direction at room temperature.  If drawing depth is more severe, please refer to DS Type B Steels.

CS Type B is susceptible to aging, which may cause problems such as stretcher strains, fluting, coil breaks (in heavy gauges), loss of ductility and increased hardness.  Roller leveling this grade prior to forming will reduce the chance for stretcher strains or fluting caused by aging.  However, leveling will not restore softness or ductility.

• Weldability – Low carbon level makes this a good welding candidate.

• Fatigue Performance – Compared to other low-carbon steels, CS Type B has the highest yield strength, which means it will have a good resistance to fatigue.  But higher strength steels may be better candidates for durability sensitive components.

• Denting – CS Type B is not used on exposed applications due to the aging characteristics.  For dent-resistant grades and capabilities, please check our dent- resistant steels.

• Applications – CS Type B is a product that is best suited for unexposed applications.  These materials work well for applications with very little depth of draw.  CS Type B is typically used on truck bed floors and other floor pans with little formability requirements.  Other suitable parts are truck cab backs and tailgate access covers.

Typical Properties for CS Type B:

Product	Yield Strength [MPa]	Tensile Strength [MPa]	Elongation [%]	n-value	True Stress/Strain Curve
Hot Roll	230	345	31	N/A	N/A
Cold Roll	207	304	38	N/A	N/A
EG	210	293	37	N/A	N/A
HDGI	269	345	40	0.210	N/A
HDGA	269	345	40	0.210	N/A