ASTM A847 is a specification for high strength low alloy (HSLA) weathering steel cold-formed and welded into square and rectangular tubing and pipe.
A847 steel pipe and tube are widely used products which are ideal for atmospheric corrosion resistance and are generally left unpainted. Elements such as copper, chromium, nickel and silicon are used for enhanced corrosion resistance.
A847 is employed in applications where corrosion resistance is the critical factor and is widely used for fencing, signposts, and sign structures (highway DOT).
Its attractive finish makes it highly suitable for pedestrian bridges, highway bridges, outdoor pavilions, architectural exposed structural applications, and more.
| 40*40 – 300*300 mm | 1/8, 3/16, 1/4, 3/8, 1/2 inch | |
| ASTM A847 |
| 12.5 MM (kg/m) | 2.5 MM (kg/m) | 2.0 MM (kg/m) | 3.0 MM (kg/m) | 5.0 MM (kg/m) | 4.0 MM (kg/m) | 6.0 MM (kg/m) | 10.0 MM (kg/m) | 8.0 MM (kg/m) | |
|---|---|---|---|---|---|---|---|---|---|
| 50 x 50 | - | 3.60 | 2.93 | 4.25 | 6.56 | 5.45 | - | - | - |
| 40 x 40 | - | 2.82 | 2.31 | 3.30 | - | 4.20 | - | - | - |
| 60 x 60 | - | 4.39 | 3.56 | 5.19 | 8.13 | 6.71 | - | - | - |
| 80 x 80 | - | - | - | 7.07 | 11.3 | 9.22 | 13.2 | - | - |
| 70 x 70 | - | - | - | 6.13 | 9.70 | 7.97 | - | - | - |
| 90 x 90 | - | - | - | 8.01 | 12.8 | 10.5 | 15.1 | - | - |
| 120 x 120 | - | - | - | - | 17.6 | 14.3 | 20.8 | 31.8 | 26.4 |
| 140 x 140 | - | - | - | - | 20.7 | 16.8 | 24.5 | 38.1 | 31.4 |
| 100 x 100 | - | - | - | 8.96 | 14.4 | 11.7 | 17.0 | - | 21.4 |
| 150 x 150 | 48.7 | - | - | - | 22.3 | 18.0 | 26.4 | 41.3 | 34.0 |
| 180 x 180 | 60.5 | - | - | - | 27.0 | - | 32.1 | 50.7 | 41.5 |
| 160 x 160 | 52.6 | - | - | - | 23.8 | 19.3 | 28.3 | 44.4 | 36.5 |
| 200 x 200 | 68.3 | - | - | - | 30.1 | - | 35.8 | 57.0 | 46.5 |
| 250 x 250 | 88.0 | - | - | - | - | - | 45.2 | 72.7 | 59.1 |
| 220 x 220 | 76.2 | - | - | - | - | - | 39.6 | 63.2 | 51.5 |
| 300 x 300 | 108 | - | - | - | - | - | 54.7 | 88.4 | 71.6 |
|
483 MPa |
70,000 ksi |
|
|
345 MPa |
50,000 ksi |
|
|
(in 50 mm) |
N/A |
N/A |
|
C |
P |
S |
||
|
0.24% max |
1.40% max |
0.15% max |
0.06% max |
0.20% |
STM A847 hss square tube chemical properties
| IRSM 41 -97 | ASTM 588 GR A | ASTM 242 TYPE -1 | ||
|---|---|---|---|---|
| 0.25-0.45 | 0.80-1.25 | 0.20-50 | 1.00 | |
| 0.10 | 0.19 | 0.12 | 0.15 | |
| 0.07-0.11 | 0.04 | 0.07-0.15 | 0.15 | |
| 0.28-0.72 | 0.30-0.65 | 0.25-0.75 | 0.25-0.40 | |
| 0.030 | … | – | – | |
| 0.030 | 0.05 | 0.030 | 0.05 | |
| 0.30-0.50 | 0.40-065 | 0.50-1.25 | – | |
| 0.20-0.49 | 0.40 | 0.65 | – | |
| 0.30-0.39 | 0.25-0.40 | 0.25-0.55 | 0.20 min | |
| – | – | – | – | |
| 0.050 | 0.02-0.10 | – | – |
Applications of ASTM A847 Weathering Steel Tube & Pipe
ASTM A847 weathering steel pipe and tube is designed for that require high strength and long-term resistance to atmospheric corrosion. It can be used for many outdoor installations, as it forms a stable, protective oxide layer that eliminates the need for painting or regular maintenance.
• , where A847's minimum yield strength of 345 MPatensile strength up to 485–635 MPa provide strong load-bearing capability and long service life under varying weather conditions.
• , natural rust-like patina blends beautifully with urban or natural surroundings.
• , taking advantage of its durability and resistance to abrasion and oxidation.
• , offering excellent mechanical strength and minimal maintenance over decades of outdoor exposure.
• , where resistance to humidity, salt air, and pollutants is essential.
Corten A847 tubes are available in ½ inch to 20 inches in diameterwall thicknesses from 2 mm to 40 mm. These properties make A847 an ideal choice for , requiring both structural reliability and aesthetic appeal.
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