CR01/CR02/CR04/CR05/CR06 Cold Rolled Steel

Low carbon steel with good weldability and formability. It is commonly used in applications that require low weight and high strength, ranging from automotive body panels to appliances and office furniture. It is also used in the production of steel drums, steel pipes and other tubular products.

Grade	Chemical Composition for CR Mild Steels
Grade	Caron⁽¹⁾	Manganese	Phosphorus	Sulfur	Aluminum⁽²⁾
CR01	0.13 max	0.60 max	0.030 max	0.035 max	N/A
CR02	0.13 max	0.50 max	0.030 max	0.020 max	N/A
CR04⁽²⁾	0.08 max	0.50 max	0.025 max	0.020 max	0.015 min
CR05⁽²⁾	0.025 max	0.30 max	0.020 max	0.020 max	0.015 min
CR06⁽²⁾	0.020 max	0.25 max	0.020 max	0.020 max	0.015 min

NOTE 1 : Only for special application, the letter B shall be added when a minimum Carbon content of 0.015% or 0.0003% (3ppm) Boron is required (i.e., CR04B).

NOTE 2 : Aluminium killed fine grain steel. Total Al content ≥ 0.015%. Titanium, Niobium and other alloying elements (e.g. B) can be used in combination for fully stabilized products. No change in mechanical properties for at least six months.

NOTE 3 : Total aluminium (free and combined).

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	A₅₀ % min¹	A₈₀ % min	n _10%-20% min²	r-90° min3
CR01	140~300	270~410	30	28	-	-
CR02	140~240	270~370	34	34	0.16	1.3
CR04	140~210	270~350	38	38	0.18	1.6
CR05	140~180	270~330	40	39	0.20	1.9
CR06	110~170	270~330	42	41	0.22	2.1

NOTE 1 : ZnNi and galvanneal coated steels: total elongation shall be reduced by 2%.

NOTE 2 : The n value can be 0.01 lower for ZnNi and galvanneal coated products.

NOTE 3 : The r-90o value can be 0.2 lower for thickness > 1.4 mm and/or galvanneal coated products.