COLD ROLLED STEEL

– Advantages:

+ Come in different shapes and sizes with a smooth and shiny surface, our products can meet the diverse demands and requirements or customers.

+ With the high-quality and impact resistance, Vina One Cold Rolled Steel have an edge of durability and reliability that make us the trusted supplier or high-grade steel for various requirements. 

– Applications:

+ Industries: shipbuilding, automobile, etc.

+ Engineering: panel manufacturing, packaging, fabrication, drums, barrels, etc.

+ Home appliances, Metal furnitures. 

Vina One not only manufactures the products as our standard commercial specifications, but also make to customer’s orders. 

DIVISION   TOLERANCES
Thickness (mm) Width (mm)   Nominal thickness   Thickness tolerance (%) Width tolerance
0.16 ~ 2.00 300 ~ 1250   t ≤ 0.25 ±0.04 -0, +7
  0.25 < t ≤ 0.40 ±0.05
  0.40 < t ≤ 0.60 ±0.06
  0.60 < t ≤ 0.80 ±0.07
  0.80 < t ≤ 1.00 ±0.07
  1.00 < t ≤ 1.25 ±0.08
 Symbol of quality Chemical Composition (%) Mechanical Properties
C   Mn P S  Tensile strength (N/mm2) (%)
  0.25mm ≤ t < 0.3mm 0.3mm ≤ t < 0.4mm 0.4mm ≤ t < 0.6mm 0.6mm ≤ t < 1.0mm 1.0mm ≤ t< 1.6mm 1.6mm ≤ t < 2.5mm 0.25mm ≤ t 
 
SPCC ≤ 0.15   ≤ 0.60 ≤ 0.100 ≤ 0.035 ≥ 270 ≥ 28 ≥ 31 ≥ 34 ≥ 36 ≥ 37 ≥ 38 ≥ 39
SPCD ≤ 0.10   ≤ 0.50 ≤ 0.040 ≤ 0.035 ≥ 270 ≥ 30 ≥ 33 ≥ 36 ≥ 38 ≥ 39 ≥ 40 ≥ 41
SPCE ≤ 0.08   ≤ 0.45 ≤ 0.030 ≤ 0.030 ≥ 270 ≥ 32 ≥ 35 ≥ 38 ≥ 40 ≥ 41 ≥ 42 ≥ 43
Hardness (HRB & HV)
Temper grade  Symbol of temper grade Hardness
HRB HV
AS-annealed
A ≤ 57 ≤ 105
Standard temper grade
S ≤ 65 ≤ 115
1/8 hard 8 50 ~ 71 95 ~ 130
1/4 hard 4 65 ~ 80 115 ~ 150
1/2 hard 2 74 ~ 89 135 ~ 185
Full hard 1 ≤ 80 ≤ 170
Shape Bending test
 Category  Tolerances (mm)
 Temper grade Symbol of temper grade Bending angle
Bend radius 
 Testing piece
 Flatness  Wave  Edge wave  Central buckle AS-annealed A 1800

Testing piece thickness
No. 3 in rolling direction
≤ 12 ≤ 8 ≤ 6 Standard temper grade
S 1800

Testing piece thickness
 Bendability
≤ 4 in any 2000 length (width ≤ 630)
1/8 hard 8 1800

Testing piece thickness
1/4 hard 4 1800

Testing piece thickness x 0.5
≤ 2 in any 2000 length (width ≤ 630)
 1/2 hard 2 1800

Testing piece thickness x  1.0
Full hard 1