ALCOSTA

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Hot-dip aluminized steel (ALCOSTA) has been recognized for the excellence of quality and technology in the global market as it was selected as world’s top product offering the best quality in galvanized steel sheet industry. The surface of ALCOSTA is very beautiful and has outstanding heat reflectivity. It is used for thermal reflectors in toaster, gas range, oil stove, gas oven, clothes dryer, etc. ALCOSTA forms a thin oxide layer and hydroxide layer in the air and water and offers outstanding corrosion resistance.

Applications

icon-image
  • Home appliances
  • Automobile parts
  • Steel cans
  • Oil pipeline cover
icon-image
  • Home appliances
  • Automobile parts
  • Steel cans
  • Oil pipeline cover

Product Details

Classification POSCO India Pune Processing Canter
Available Size
Thickness (mm)
0.30 ~ 2.30
Width (mm)
750 ~ 1,450
Weight (Ton)
Max 25
Product Grade
Commercial (CQ), Drawing (D), Deep Drawing (DD), Extra Deep Drawing (EDD)
Coating
40 gsm – 240 gsm
Inner Diameter (mm)
508(20”) / 610(24″)

Quality Specifications

ASTM A 463

Classification Symbol Yield Strength (MPa) EL (%)
Commercial Quality
CS Type A
170 ~ 345
≥20
CS Type B
205 ~ 345
≥20
CS Type C
170 ~ 380
≥15
Drawing Quality
DDS
140 ~ 240
≥32
Deep Drawing Quality
EDDS
125 ~ 205
≥38

DIN EN 10346

Classification Symbol Yield Strength (MPa) Tensile Strength (MPa) EL (%)
Commercial Quality
DX51D
–
270 ~ 500
≥22
Drawing Quality
DX52D
140 ~ 300
270 ~ 420
≥26
DX53D
140 ~ 260
270 ~ 380
≥30
Deep Drawing Quality
DX54D
120 ~ 220
260 ~ 350
≥34
Extra Deep Drawing Quality
DX56D
120 ~ 180
260 ~ 350
≥39

Coating Weight

Minimum Coating Weight (double side)

Coating Weight Symbol Min Coating Weight for 3 Points on Both Sides Min Coating Weight for 1 Point on Both Sides POSCO STEELEON KS D 3544 JIS G 3314 ASTM A 463 DIN EN 10346
40
40
30
A04
40
40
T1-13(40)
–
60
60
45
A06
60
60
–
AS 060
80
80
60
zA08
80
80
T1-25(75)
–
100
100
75
A10
100
100
–
AS 100
120
120
90
AS12
–
120
T1-40(120)
–
160
160
120
A16
–
–
–
–
  1. Average 3 point coating weight on both sides is the arithmetic mean of 3 test piece measurements obtained from the sample
  2. Minimum coating weight is determined based on the discussion with POSCO STEELEON

Post Treatment

Chemical Treatment

Type Symbol
General chemical treatment
CX
Cr-free treatment
NX
Lubrication treatment
LX
No treatment
XX

Oiling

Type Symbol
Oiled
PS: Single side 300 ~ 500 mg/m2
PL: Single side 501 ~ 1000 mg/m2
PL: Single side 1001 ~ 1500 mg/m2
PL: Single side 1500 ~ 2000 mg/m2
Non-oiled
PX (no oiling)

Dimensional Tolerance

Thickness Tolerance - KS, JIS

Thickness (t) Width (w) W < 1000 Mark
0.40 ≤ t ≤ 0.60
± 0.07
± 0.07
0.60 ≤ t ≤ 1.00
± 0.10
± 0.11
1.00 ≤ t ≤ 1.60
± 0.13
± 0.14
1.60 ≤ t ≤ 2.30
± 0.17
± 0.18
2.30 ≤ t
± 0.21
± 0.22

Thickness Tolerance - ASTM

Thickness (t) Width (w) W<1500
t ≤ 0.4
± 0.08
0.4 < t ≤ 1.0
± 0.10
1.0 < t ≤ 1.5
± 0.13
1.5 < t ≤ 2.0
± 0.15
2.0 < t ≤ 2.5
± 0.30

Thickness Tolerance - DIN, EN

Thickness (t) Width (w) W ≤ 1000 1200 < W ≤ 1500
t ≤ 0.40
± 0.05
± 0.06
0.40 < t ≤ 0.60
± 0.05
± 0.06
0.60 < t ≤ 0.80
± 0.06
± 0.07
0.80 < t ≤ 1.00
± 0.07
± 0.08
1.00 < t ≤ 1.20
± 0.08
± 0.09
1.20 < t ≤ 1.60
± 0.11
± 0.13
1.60 < t ≤ 2.00
± 0.14
± 0.15
2.00 < t ≤ 2.30
± 0.16
± 0.17

Width Tolerance

Width Tolerance - KS, JIS

Width (w) Tolerance
Max 1500
+ 7
– 0

Width Tolerance - ASTM

Width (w) Tolerance
600 ≤ t < 1200
– 0, + 5
1200 ≤ t < 1500
– 0, + 6

Notes: The product standards are for reference. Please be sure to confirm the recent standards when making orders with Technical Services.

Customer Enquiry

Please connect with POSCO with your inquiries at the nearest Processing Center

Pune
Processing Center

Hyderabad Processing Center

Delhi Processing Center

Ahmedabad Processing Center

Chennai Processing Center