Cold Rolled Steel

Cold-rolled steel sheet is a metal sheet that is cold-rolled to hot-rolled billets at room temperature to improve surface quality,dimensional accuracy and mechanical properties. It is commonly used in automobiles,home appliances and construction.

HC260LA cold-rolled steel coils

High Strength Low Alloy Cold Rolled Steel HC260LA-HC900LA

It is a kind of low carbon engineering structure steel that can be welded. Its carbon content has higher yield strength and better cold and hot working formability than ordinary carbon structural steel. It has good weldability, low cold and brittle tendency, notching and aging sensitivity, and good resistance to atmospheric and seawater corrosion.

Grade YS Strength
(MPa) 		Tensile Strength
(MPa)
Not less than 		Elongation A80mm %
Not less than 		r90°d,e n90°d Bake Hardeningb,f
(BH2)
HC260LAb 260~330 350~430 ≥26 – ≥0.14 –
HC300LAb 300~380 380~480 ≥23 – ≥0.14 –
HC340LAb 340~420 410~510 ≥21 – ≥0.12 –
HC380LAb 380~480 440~570 ≥19 – ≥0.12 –
HC420LAb 420~520 470~600 ≥17 – ≥0.11 –
HC460LAb 460~580 510~660 ≥15 – ≥0.10 –
HC500LAb 500~620 550~700 ≥14 – – –
HC550LAb 550~700 620 ≥11 – – –
HC600LAb ≥600 650~800 ≥10 – – –
HC650LAg ≥650 700~850 ≥10 – – –
HC700LAg ≥700 750~900 ≥9 – – –
HC750LAg ≥750 800~950 ≥9 – – –
HC800LAg ≥800 850~1000 ≥8 – – –
HC850LAg ≥850 900~1050 ≥8 – – –
HC900LAg 850~1050 980~1150 ≥7 – – –

a. RP0.2 is used when the yield phenomenon is not obvious, and ReL is used.

b. The sample is P6 in GB/T 228.1, and the direction of the sample is transverse.

c. When the nominal thickness of the product is greater than 0.50mm, but less than 0.70mm, the elongation after breaking is allowed to decrease by 2%; When the nominal thickness of the product is not more than 0.50mm, the elongation after breaking is allowed to decrease by 4%.

d. r value, n value is only applicable to products with thickness not less than 0.50mm. When the nominal thickness of low alloy steel products is greater than 2.3mm, the n value regulation is no longer applicable.

e. When the nominal thickness of the product is greater than 1.5mm, the r90 value is allowed to decrease by 0.2. When the nominal thickness of the product is greater than 2.5mm, the provisions of r90 are no longer applicable.

f. When the thickness is greater than 1.2mm, the BH2 value shall be negotiated separately.

g. The sample is P6 in GB/T 228.1, and the direction of the sample is longitudinal.

Grade Chemical Component %
C Mn P S Alt Si Ti Nb
HC260LA ≤0.10 ≤1.0 ≤0.030 ≤0.025 ≥0.010 ≤0.5 ≤0.15d ≤0.09d
HC300LA ≤0.12 ≤1.4 ≤0.030 ≤0.025 ≥0.010 ≤0.5 ≤0.15d ≤0.09d
HC340LA ≤0.12 ≤1.5 ≤0.030 ≤0.025 ≥0.010 ≤0.5 ≤0.15d ≤0.09d
HC380LA ≤0.12 ≤1.6 ≤0.030 ≤0.025 ≥0.010 ≤0.5 ≤0.15d ≤0.09d
HC420LA ≤0.12 ≤1.6 ≤0.030 ≤0.025 ≥0.010 ≤0.5 ≤0.15d ≤0.09d
HC460LA ≤0.14 ≤1.8 ≤0.030 ≤0.025 ≥0.010 ≤0.5 ≤0.15d ≤0.09d
HC500LA ≤0.14 ≤1.8 ≤0.030 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.09d
HC550LA ≤0.14 ≤1.8 ≤0.030 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.09d
HC600LA ≤0.14 ≤2.0 ≤0.025 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.10d
HC650LA ≤0.14 ≤2.0 ≤0.025 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.10d
HC700LA ≤0.14 ≤2.0 ≤0.025 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.10d
HC750LA ≤0.14 ≤2.0 ≤0.025 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.10d
HC800LA ≤0.14 ≤2.0 ≤0.025 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.10d
HC850LA ≤0.14 ≤2.5 ≤0.025 ≤0.025 ≥0.010 ≤0.6 ≤0.15d ≤0.10d
HC900LA ≤0.15 ≤2.8 ≤0.025 ≤0.025 ≥0.010 ≤0.8 ≤0.16d ≤0.10d

a. Partial or total substitution of Ti by Nb is allowed, in which case the total content of Nb and/or Ti should not exceed 0.20%.

b. Partial or total substitution of Ti by Nb is allowed, in which case the total content of Nb and/or Ti should not exceed 0.12%.

c. Nb can be replaced in part or in whole by Ti, and the total content of Ti and/or Nb is less than 0.10%.

d. Ti and Nb can be added individually or in combination. V and B can also be added, and the total content of these alloying elements is less than 0.22%.