Block Steel specializes in Aluminized Steel and is the country’s largest Aluminized distributor. We also stock Aluminized Stainless and distribute roll formed shapes. Block’s inventory averages over 25,000 tons, which means we can fill almost all aluminized orders immediately.

ALUMINIZED STEEL INVENTORY (ASTM A463)
Coatings
Oz/Sq Ft
T1-40
.40
T1-25
.25
T1-13
.13
T1-60
.60
Type 2
.65
Gauges .012 Through .146 = Manufactured Limit
Widths Up to 60″ Wide = Manufactured Limit
Grades CS(A or B), DDS, EDDS, EDDS+, Structural, HSLA
Surface Oiled, Dry, Chemical Treatment

Aluminized Steel (ASTM-A463) is hot-dip coated on both sides with an aluminum/silicon alloy coating. This steel has the surface characteristics of aluminum with the superior strength and lower cost of steel. It is produced with a soft, satin-like finish.

TYPE 1: Hot-dip coated with an aluminum/silicon alloy containing 5% to 11% silicon to promote better adherence. It is intended principally for heat resisting applications and also for uses where corrosion resistance and heat are involved. Possible end uses are mufflers, furnaces, ovens, ranges, heaters, water heaters, fireplaces, and baking pans.

TYPE 2: Hot-dip coated with commercially pure aluminum. It is intended principally for applications requiring atmospheric corrosion resistance. Type 2 may ultimately be manufactured into corrugated roofing and siding, grain bins, air conditioner housings and drying ovens.

ALUMINIZED TYPE 1 STAINLESS 409 AND 439: The coating is Type 1 Aluminized, containing approximately 91% aluminum and 9% silicon, that is metallurgically bonded to the stainless substrate. The aluminum coating significantly extends the life of a car exhaust system over that of bare stainless.

ALUMINIZED STEEL COATING WEIGHT
Total Coating on Both Sides
Coating
Minimum/English
Oz/Sq Ft
Minimum/Metric
Grams/Sq M
T1-13 .13 40
T1-25 .25 76
T1-40 .40 122
T1-60 .60 182
Type 2 .65 184
ALUMINIZED STEEL TYPE 1
Typical Mechanical Properties
Grade Yield Tensile Elong R Val
CS 47ksi 56ksi 31%
DDS 31ksi 48ksi 40% 1.2
EDDS 29ksi 46ksi 42% 1.4
EDDS+ 26ksi 45ksi 42% 1.7
ALUMINIZED GAUGE TABLE
Thickness & Weight Equivalents
Gauge Thickness in Inches Pounds Per Sq Ft
No. Mean Low High Type 1 Type 2
10 .138 .129 .147 5.598 5.571
11 .123 .114 .132 4.977 4.950
12 .108 .099 .117 4.365 4.338
13 .093 .085 .101 3.753 3.726
14 .079 .071 .087 3.182 3.115
15 .071 .065 .077 2.856 2.829
16 .064 .058 .070 2.570 2.543
17 .058 .053 .063 2.325 2.298
18 .052 .047 .057 2.081 2.053
19 .046 .041 .051 1.836 1.809
20 .040 .036 .044 1.591 1.564
21 .037 .033 .041 1.469 1.441
22 .034 .030 .038 1.346 1.319
23 .031 .027 .035 1.224 1.197
24 .028 .024 .032 1.101 1.074
25 .025 .021 .029 0.979 0.952
26 .022 .019 .025 0.857 0.829
27 .020 .017 .023 0.775 0.748
28 .019 .016 .022 0.764 0.707
29 .017 .014 .020 0.653 0.625
30 .016 .013 .019 0.612 0.585

Block Steel FYI

Aluminized has superior performance compared to galvanized for resistance to atmospheric, salt spray and muffler condensate corrosion

prodc