ASTM A1085

Atlas Tube is a proud producer of ASTM A1085 — the new cold-formed, welded carbon steel HSS specification. This new spec offers enhanced performance in seismic and other fatigue-related applications, resulting in an easier, more cost-effective HSS design overall. A1085 raises the bar on performance, bringing HSS to the forefront of steel design.

ASTM A1085A Dynamic Step Forward

ASTM A500-13 GRADE B ASTM A1085Scope Cold-formed welded & seamless Cold-formed welded

Max. Perimeter 88" 88"

Thickness Range t < 0.875" 0.148" < t < 0.875"

Yield StressRound 42 ksi min.

All shapes50 ksi min.

Sq. / rect. 46 ksi min. 70 ksi max.

Tensile StressRound 58 ksi min.

65 ksi min.Sq. / rect. 58 ksi min.

Wall Thickness -10% -5%

Mass Tolerance N/A -3.5%

Corner Radii (Rectangular and

Square HSS)r < 3 t

t < 0.400" 1.6 t to 3.0 t

t > 0.400" 1.8 t to 3.0 t

CVN N/A 25 ft.-lbs. @ 40° F

Supplemental Requirements N/A

Optional heat-treating

Optional varying CVN

To learn more about this exciting new spec, visit atlastube.com/astm-a1085

A1085 HSS: Benefits & Advantages

Minimum yield stress of 50 ksiAll sizes and shapes (round, square, rectangular) will have the same minimum yield stress of 50 ksi used for design.

Tighter material tolerancesMore stringent wall tolerances and the addition of a mass tolerance mean the full nominal wall thickness can be used for design of HSS. This means no longer needing to reduce the nominal wall thickness by 0.93 as prescribed in the AISC Steel Construction Manual for both member selection and connection design.

More area available for design and a higher minimum yield mean that HSS are more economical and more efficient.

Maximum yield stress of 70 ksiThe actual yield stress cannot exceed 70 ksi. This maximum yield point will result in a lower expected yield strength and the associated overstrength factors. This will reduce capacity design requirements in seismic designs.

This is the only specification used in North America or Europe that puts an upper limit on the yield stress in HSS.

Standard requirement for Charpy V-notch toughness This new specification will require all HSS to meet a minimum CVN value of 25 ft.-lbs. at 40° F, which corresponds to Zone 2, Fracture Critical Elements, as listed in ASTM A709 and AASHTO M270.

Having the minimum CVN required makes HSS more suitable for use in structures subject to fatigue.

Applications Sign supports and poles

Amusement rides

Buildings

Bridges

Towers

Cranes

And more!

1855 East 122nd Street Chicago, IL 60633P 800.733.5683 F 773.646.6128

200 Clark Street Harrow, ON N0R 1G0P 800.265.6912 F 519.738.3537

[email protected] atlastube.com

ATU-012717

A1085 AVAILABILITY CHART — ROUNDS

OD NOMINAL WALL THICKNESS

.188 .250 .313 .375 .500 .625 .750 .875

2 x 2 4.320 — — — — — — —

2.5 x 2.5 5.590 7.110 — — — — — —

3 x 3 6.870 8.810 10.580 12.170 — — — —

3.5 x 3.5 8.150 10.510 12.700 14.720 — — — —

4 x 4 9.420 12.210 14.830 17.270 21.630 — — —

4.5 x 4.5 10.700 13.910 16.960 19.820 — — — —

5 x 5 11.970 15.620 19.080 22.370 28.430 — — —

6 x 6 14.530 19.020 23.340 27.480 35.240 42.300 — —

7 x 7 17.080 22.420 27.590 32.580 42.050 50.810 — —

8 x 8 19.630 25.820 31.840 37.690 48.850 59.320 — —

10 x 10 24.730 32.630 40.350 47.900 62.460 76.330 — —

12 x 12 — 39.430 48.860 58.100 76.070 93.340 109.910 —

14 x 14 — — 57.360 68.310 89.680 110.360 130.330 149.610

16 x 16 — — 65.870 78.520 103.300 127.370 150.750 173.430

18 x 18 — — — 88.730 116.910 144.390 171.160 197.240

20 x 20 — — — 98.940 130.520 161.400 191.580 221.060

A1085 AVAILABILITY CHART — SQUARES

OD NOMINAL WALL THICKNESS.188 .250 .313 .375 .500

1.9 3.432 — — — —

2.375 4.385 — — — —

2.5 4.646 — — — —

2.875 5.400 — — — —

3.0 5.651 7.349 — — —

3.5 6.656 8.686 — — —

4.0 7.661 10.022 — — —

4.5 8.644 11.358 14.010 16.536 —

5.0 9.671 12.694 15.683 18.540 24.030

5.563 10.775 14.199 — 20.797 27.062

6.625 12.903 17.037 21.120 25.055 32.738

8.625 16.956 22.382 27.816 33.072 43.428

10.75 21.171 28.061 34.922 41.591 54.786

12.75 — 33.406 — 49.608 65.476

14.0 — 36.747 — 54.619 72.158

16.0 — 42.092 — 62.637 82.848

18.0 — 47.437 — 70.654 93.540

20.0 — 52.782 — 78.672 104.228







ATU-020818

A1085 AVAILABILITY CHART — RECTANGLESOD NOMINAL WALL THICKNESS

.188 .250 .313 .375 .500 .625 .750 .875

2 x 1 3.040 — — — — — — —

2.5 x 1.5 4.320 5.410 — — — — — —

3 x 1 4.320 — — — — — — —

3 x 1.5 4.960 6.260 — — — — — —

3 x 2 5.590 7.110 — — — — — —

3.5 x 2.5 6.870 8.810 — — — — — —

4 x 2 6.870 8.810 10.580 12.170 — — — —

4 x 3 8.150 10.510 12.700 14.720 — — — —

5 x 2 8.150 10.510 12.700 14.720 — — — —

5 x 2.5 8.780 11.360 — — — — — —

5 x 3 9.420 12.210 14.830 17.270 — — — —

5 x 4 10.700 13.910 16.960 19.820 — — — —

6 x 2 9.420 12.210 14.830 17.270 — — — —

6 x 3 10.700 13.910 16.960 19.820 — — — —

6 x 4 11.970 15.620 19.080 22.370 28.430 — — —

7 x 3 11.970 15.620 19.080 22.370 — — — —

7 x 4 13.300 17.320 21.220 24.930 31.840 — — —

7 x 5 14.530 19.020 23.340 27.480 35.240 — — —

8 x 2 11.970 15.620 19.080 22.370 — — — —

8 x 3 13.300 17.320 21.220 24.930 31.840 — — —

8 x 4 14.530 19.020 23.340 27.480 35.240 42.300 — —

8 x 6 17.080 22.420 27.590 32.580 42.050 50.810 — —

10 x 2 14.530 19.020 23.340 27.480 — — — —

10 x 3 15.800 20.720 25.460 — — — — —

10 x 4 17.080 22.420 27.590 32.580 42.050 50.810 — —

10 x 6 19.630 25.820 31.840 37.690 48.850 59.320 — —

10 x 8 22.180 29.230 36.100 42.790 55.660 67.820 — —

12 x 4 19.630 25.820 31.840 37.690 48.850 59.320 — —

12 x 6 22.180 29.230 36.100 42.790 55.660 67.820 — —

12 x 8 24.730 32.630 40.350 47.900 62.460 76.330 — —

14 x 4 22.180 29.230 36.100 42.790 55.660 67.820 — —

14 x 6 24.730 32.630 40.350 47.900 62.460 76.330 — —

14 x 10 — 39.430 48.860 58.100 76.070 93.340 — —

16 x 4 24.730 32.630 40.350 47.900 62.460 76.330 — —

16 x 8 — 39.430 48.860 58.100 76.070 93.340 — —

16 x 12 — — 57.360 68.310 89.680 110.360 — —

18 x 6 — 39.430 48.860 58.100 76.070 93.340 — —

20 x 4 — 39.430 48.860 58.100 76.070 — — —

20 x 8 — 46.750 57.360 68.310 89.680 110.360 — —

20 x 12 — 53.550 65.870 78.520 103.300 127.370 150.750 —

24 x 12 — — — — 116.910 144.390 171.160 —

Please contact Atlas Tube for additional details on specifications or if the size you are looking for is not listed.

Rolled every 2–6 weeks; some sizes may be subject to minimums of 15–30 tons. Rolled every 2–6 weeks; minimum is one standard bundle.

Rolled every 6–12 weeks; some sizes may be subject to minimums of 15–30 tons. Jumbo size; available from stock or special order.

ASTM A53-12 ASTM A500-13 ASTM A1085-15

DE

SC

RIP

TIO

N

Standard specification for pipe, steel, black and hot-dipped, zinc-coated,

welded and seamless

Standard specification for cold-formed welded and seamless carbon steel

structural tubing in rounds and shapes

Standard specification for cold-formed welded carbon steel hollow structural

sections (HSS)

INT

EN

DE

D U

SE

Mechanical and pressure applications; also acceptable for ordinary uses in

steam, water, gas and air lines

Welded, riveted or bolted construction of bridges and buildings, and for general

structural purposes

Welded or bolted construction of buildings, bridges, towers, cranes, sign supports and

poles, off-shore production and drilling platforms, roll-over protective structures

(ROPS), falling object protective structures (FOPS), and amusement rides

AD

VAN

TAG

ES

—

Superior surface finish (bare — no mill lacquer coating applied); higher strength-to-weight ratio; readily available on a two- to three-week rolling cycle; specific lengths

available from production: 18'–125'

All the advantages of A500, as well as standard requirement for Charpy V-notch toughness; no section property reduction factor required; ideal for use in structures

subject to fatigue and seismic loading

STEEL GRADE COMPARISON




To find a local HSS distributor, contact Atlas Tube.atlastube.com | 800.733.5683

ATU-110317

TECHNICAL INFORMATIONSPECIFICATIONS ASTM A53-12 ASTM A500-13 ASTM A1085-15

Strength Levels Types E and S, Grade A

Types E and S, Grade B Grade C Grade A

Yield Strength 30,000 psi 35,000 psi 46,000 psi 50,000 psi min. / 70,000 psi max.

Tensile Strength Min. 48,000 psi 60,000 psi 62,000 psi 65,000 psi

Elongation % Min. Varies Varies 21 21

Lengths Single random lengths (16'–24') or double random lengths (36'–46')

18'–125' (depending on the size and gauge)

18'–125' (depending on the size and gauge)

Tolerances All Grades All Grades Grade A

OD Size +/- 1% +/- .75% +/- .75%

Wall Thickness - 12.5% +/- 10% + 10% / - 5%

Chemistry Higher C, Mn, P, S and residual elements that could impact weldability

Low C, Mn, P, S and residual elements for superior weldability in the shop

or in the field

Low C, Mn, P, S and residual elements, along with a maximum permissible

carbon equivalent of .45%, for superior weldability in the shop or in the field

Size Availability 13 different sizes available from 1.900" OD to 16.000" OD

27 different sizes available from 1.315" OD to 20.000" OD

25 different sizes available from 1.900" OD to 20.000" OD

Gauge AvailabilityA variety of gauges are available.

Some of the heavier sections are only available as a seamless product.

Standard gauges available are .125", .188", .250", .313", .375", .438", .500" and .625", as well as all the nominal

pipe gauges.

Standard gauges available are .188", .250", .313", .375", .500" and .625";

minimums apply to NPS gauges.

Straightness Not specified 1/8" x length (in feet), divided by five 1/8" x length (in feet), divided by five

Documents

ASTM A1085