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NEAWBILITYAVAILNINFORMATIOEINSIDASTM A1085 HSSSpecification Pocket Reference Guide

ASTM A1085 HSS: A Higher StandardReadily available from Atlas Tube, ASTM A1085 HSS offer improvedperformance and more cost-effective design, thanks to:Tighter material tolerances and a minimum yield stress of 50 ksiMore available area and a higher minimum yield mean a moreeconomical and efficient design.Maximum limit on yield stress of 70 ksiA1085 is the only specification used in North America or Europe thatlimits the maximum yield stress in HSS.Standard requirement for Charpy V-notch toughnessA minimum CVN value of 25 ft.-lbs. at 40 F makes HSS more suitablefor use in structures subject to fatigue and requiring a higher level of toughness.Atlas Tube is a division of Zekelman Industries, the largest independent tube and pipe manufacturer in North America.Use this guide when you’re planning a new project so you can quickly referenceall properties of rectangular, square and round A1085 HSS!

Frequently Asked QuestionsWhat is ASTM A1085?ASTM A1085 is a new specification for hollow structural sections (HSS). The intent of thestandard is to raise the performance level of HSS and make HSS more efficient to use.Why is there a new standard?ASTM A1085 addresses some of the performance concerns that engineers have raisedthrough the years over tolerances, yield strength control and ductility.How is ASTM A1085 easier to design with than A500?ASTM A500 has two common grades and different yield strengths associated witheach of the different shapes. ASTM A1085 has a single grade and single yield strengthassociated with all shapes — rectangle / square / round. This, coupled with the tightertolerances and no section property reduction factor typically required for ASTM A500HSS by steel design codes, leads to fewer parameters to deal with in design and moreefficient designs overall.ScopeASTM A500-13, GRADE BASTM A1085Cold-formed welded & seamlessCold-formed welded88"88"t 0.875"0.148" t 0.875"Max. PerimeterThickness RangeYield StressTensile StressRound42 ksi min.Sq. / rect.46 ksi min.Round58 ksi min.Sq. / rect.58 ksi min.50 ksi min.All shapes70 ksi max.65 ksi min.Wall Thickness-10%-5%Mass ToleranceN/A-3.5%Corner Radii(rectangular andsquare HSS)r 3tCVNN/ASupplementalRequirementsN/At 0.4"1.6 t to 3 tt 0.4"1.8 t to 3 t25 ft.-lbs. @ 40 FOptional heat-treatingOptional varying CVN

What kinds of projects is ASTM A1085 suited for?Seismic applicationsASTM A1085 has a minimum design yield stress of 50 ksi. A1085 also has a maximumyield stress requirement of 70 ksi. No other specification has a maximum yield stresslimit. Having this limit on the maximum yield stress makes the expected strength ofthe material more predictable. Ry, as defined in the AISC Seismic Provisions (AISC 341),will be lower for A1085 than A500. This means connection designs in seismic zones canbe more cost-effective when using the AISC seismic design provisions.Bridge applicationsVehicle and pedestrian bridges are governed by AASHTO design requirements, whichrefer to the ASTM A709 steel specification that includes a Charpy V-notch requirement.The A500 standard for HSS did not have a Charpy V-notch requirement, thus any bridgedesigns that dictated the use of ASTM A500 needed to have additional Charpy V-notchtesting performed. All ASTM A1085 material now comes standard with a Charpy V-notchrequirement to meet the AASHTO criteria for fracture critical elements in Zone 2.Power generationThe tighter dimensional tolerances of ASTM A1085 are ideal for projects that requiretighter design tolerances. This can include nuclear power plants, similar power generationapplications or any other project where more exact design criteria may be in place.ASTM A1085 is well-suited for any project where a higher standard of performanceis required or desired.How can ASTM A1085 HSS help deliver cost savings?Specifying ASTM A1085 HSS results in enhanced performance and the potential forcost savings. Here’s how:HSS produced to ASTM A1085 are a premium product with higher level of performancethan A500. Because of the tighter material tolerances, there is more steel required toproduce the product compared to HSS produced to ASTM A500. Additional regulartesting is also required to satisfy the CVN requirements. These additional features leadto a price premium for HSS produced to ASTM A1085. This premium is about a 6–7%increase over current pricing of HSS produced to A500. Although ASTM A1085 costsmore per pound than A500, the tighter material tolerances eliminate the need to applya reduction factor (0.93 per AISC) when calculating the design properties of a section.This means engineers can utilize the full nominal section properties, thus potentiallyreducing the amount of material required and increasing the potential of cost savings.Contact Atlas Tube for information on the current premium for A1085.

How can ASTM A1085 HSS help deliver cost savings?Cost savingsLet’s say you had an axial column load demand of 380 kips, an unbraced length of 15 ft.and you are constrained to using an 8" square column. HSS 8 x 8 x ½, A500, Grade B,KL 15 ft., has an axial capacity of 441 kips and HSS 8 x 8 x ⅜, A500, Grade B,KL 15 ft., has an axial capacity of 343 kips. You would select HSS 8 x 8 x ½ with anominal weight of 48.85 plf. HSS 8 x 8 x ⅜, A1085, KL 15 ft., has an axial capacity of390 kips, which would satisfy the load demand and have a lower nominal weight of37.69 plf. This is a weight savings of approximately 23%.Enhanced performanceFor example, HSS 8 x 8 x ½, A500, Grade B, with an unbraced length of 15 ft., has anaxial capacity of 441 kips. HSS 8 x 8 x ½, A1085, with an unbraced length of 15 ft., hasan axial capacity of 500 kips. This results in more than a 13% increase in capacity,with no increase in nominal weight.Is ASTM A1085 commonly available?As knowledge of the ASTM A1085 standard continues to grow, so too has theavailability of the material. For the latest availability of ASTM A1085 materials,visit atlastube.comRECTANGLE HSS

ATLAS HSS SECTION PROPERTIES (RECTANGLE) — ASTM A1085Shape (Rectangle)Design WallThicknessShapeNominalWt.Areab/th/tAxis X-XAxis Y-YWorkable in.4in.3in.in.3in.in.in.4in.3ft.2/ft.HSS 24 x 12 x 9723520.6258.62530303915.79HSS 24 x 12 x 0701785.0220121.1889.18825903315.82HSS 24 x 12 x 831475.0716421.7509.75021202705.86HSS 20 x 12 x 0461744.8620216.6258.62523603235.12HSS 20 x 12 x 041514.9217217.1889.18820102755.15HSS 20 x 12 x 501254.9714117.7509.75016502245.19HSS 20 x 12 x 397.25.0210918.31310.31312701715.23HSS 20 x 12 x 9582.55.0591.918.59410.59410701445.24HSS 20 x 12 x 40367.25.0874.318.87510.8758631165.26HSS 20 x 8 x 89.53.32102.517.1885.1889731784.49HSS 20 x 8 x 75.03.3784.717.7505.7508061464.52HSS 20 x 8 x 59.03.4365.618.3136.3136251124.56HSS 20 x 8 x 20250.53.4655.618.5946.59453094.64.58HSS 20 x 8 x 541.33.4845.118.8756.87543076.54.60HSS 20 x 4 x 30.81.6636.017.7501.75020567.83.86HSS 20 x 4 x 325.21.7228.518.3132.31316553.23.89HSS 20 x 4 x .721.91.7424.418.5942.59414345.33.91HSS 20 x 4 x .418.21.7720.018.8752.87511837.03.93HSS 18 x 6 x .32.4664.615.1883.1884891163.82HSS 18 x 6 x 7.32.5253.915.7503.75041095.83.86HSS 18 x 6 x 337.72.5742.116.3134.31332274.23.89HSS 18 x 6 x 7.132.42.6035.816.5944.59427562.83.91HSS 18 x 6 x .026.72.6329.216.8754.87522451.03.93HSS 16 x 12 x 421244.7914413.1889.18814602184.49HSS 16 x 12 x 103.04.8411813.7509.75012001784.52HSS 16 x 12 x 280.34.9091.314.31310.3139221364.56HSS 16 x 12 x 41068.34.9377.314.59410.5947791154.58HSS 16 x 8 x .53.2584.113.1885.1887231413.82HSS 16 x 8 x 61.03.3069.713.7505.7505991163.86HSS 16 x 8 x 348.33.3654.214.3136.31346589.23.89HSS 16 x 8 x 6541.33.3946.014.5946.59439575.43.91HSS 16 x 8 x le 9

Shape (Rectangle)Design WallThicknessShapeNominalWt.Areab/th/tAxis X-XAxis Y-YWorkable in.4in.3in.in.3in.in.in.4in.3ft.2/ft.HSS 16 x 4 x 428.21.5934.213.1881.18818263.93.15HSS 16 x 4 x 324.71.6429.013.7501.75015753.83.19HSS 16 x 4 x 420.21.6923.014.3132.31312742.33.23HSS 16 x 4 x .217.61.7219.814.5942.59411036.13.24HSS 16 x 4 x .314.71.7516.214.8752.87590.629.53.26HSS 16 x 4 x 3.011.51.7812.515.1563.15670.322.63.28HSS 14 x 10 x 3186.23.97101.011.1887.1888851563.82HSS 14 x 10 x 36172.24.0183.611.7507.7507301283.86HSS 14 x 10 x 8456.84.0864.812.3138.31356498.23.89HSS 14 x 10 x 24248.44.1055.012.5948.59447882.93.91HSS 14 x 10 x 9839.64.1344.612.8758.87538767.03.93HSS 14 x 6 x 43.32.4151.211.1883.18835288.93.15HSS 14 x 6 x 37.02.4642.911.7503.75029673.83.19HSS 14 x 6 x .129.72.5133.612.3134.31323357.33.23HSS 14 x 6 x 6.925.62.5428.712.5944.59419948.63.24HSS 14 x 6 x .421.12.5723.412.8754.87516239.53.26HSS 14 x 6 x 9.216.42.6018.013.1565.15612530.23.28HSS 14 x 4 x 224.61.5730.011.1881.18815455.52.82HSS 14 x 4 x 121.61.6225.511.7501.75013446.82.86HSS 14 x 4 x 417.71.6820.312.3132.31310836.82.89HSS 14 x 4 x 0.915.51.7117.412.5942.59493.231.52.91HSS 14 x 4 x .812.91.7314.312.8752.87577.025.72.93HSS 14 x 4 x 0.310.151.7611.113.1563.15659.819.82.95HSS 12 x 8 x 55.33.1465.69.1885.188481103.93.15HSS 12 x 8 x 847.03.2054.79.7505.75040185.83.19HSS 12 x 8 x 937.33.2542.710.3136.31331266.33.23HSS 12 x 8 x 2832.03.2836.410.5946.59426556.13.24HSS 12 x 8 x 5.226.33.3129.610.8756.87521645.53.26HSS 12 x 8 x 1.320.33.3422.711.1567.15616534.73.28HSS 12 x 6 x 37.32.3744.59.1883.18828675.52.82HSS 12 x 6 x 032.02.4237.49.7503.75024162.82.86HSS 12 x 6 x .325.82.4829.410.3134.31319048.82.89HSS 12 x 6 x 66.722.22.5125.110.5944.59416241.52.91HSS 12 x 6 x .218.42.5320.610.8754.87513233.72.93HSS 12 x 6 x 2.914.32.5615.811.1565.156101.725.82.95Rectangle 11

Shape (Rectangle)Design WallThicknessShapeNominalWt.Areab/th/tAxis X-XAxis Y-YWorkable in.4in.3in.in.3in.in.in.4in.3ft.2/ft.HSS 12 x 4 x 01.5525.89.1881.18812747.02.49HSS 12 x 4 x 018.51.6022.09.7501.75011039.82.52HSS 12 x 4 x 515.31.6617.610.3132.31389.031.42.56HSS 12 x 4 x .713.41.6915.110.5942.59477.026.92.58HSS 12 x 4 x .311.21.7112.510.8752.87563.622.02.60HSS 12 x 4 x 3/161240.1880.18819.635.7818.360.898.416.44.1321

ASTM A1085 is well-suited for any project where a higher standard of performance is required or desired. How can ASTM A1085 HSS help deliver cost savings? Specifying ASTM A1085 HSS results in enhanced performance and the potential for cost savings. Here’s how: HSS produced to ASTM A1085 are a premium product with higher level of performance than A500. Because of the tighter material File Size: 1MBPage Count: 17