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ASTM A1085 HSS: Cold-Formed Welded Carbon Steel Tube

ASTM A1085: HSS Design Has Never Been Easier

pdf-image-25 ASTM A1085 Flyer  pdf-image-25ASTM A1085 Properties Chart ASTM A1085 Flyer  pdf-image-25ASTM A1085 Availability Chart

Atlas Tube is now producing ASTM A1085 HSS, a new specification that provides improved performance resulting in an easier and more cost effective HSS design. The ASTM A1085 HSS specification covers cold-formed welded carbon steel hollow structural sections (HSS) for welded or bolted construction.

*Atlas Tube charges an adder of $3/cwt ($60/ton) for A1085 over current A500 pricing – approximately 7% higher than current A500 pricing. This adder is to cover the additional material and quality control testing that A1085 requires.

ASTM A1085 HSS applications include, but aren’t limited to:

  • Buildings
  • Bridges
  • Towers
  • Cranes
  • Sign supports and poles
  • Off-shore production and drilling platforms
  • Roll-over protective structures (ROPS)
  • Falling object protective structures (FOPS)
  • Amusement rides

Want more information about ASTM A1085? Download our reference guide:
Download ASTM A1085 Customer Packet

ASTM A1085 Benefits and Advantages


Tighter material tolerances and a single minimum yield stress of 50 ksi.

  • More 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 min yield means that HSS are more economical and more efficient.

Maximum specified yield stress of 70 ksi.

  • The maximum yield will result in a lower expected yield strength and reduce capacity design requirements and column required strengths in seismic designs.
  • This is the only specification used in North America or Europe that limits the maximum yield stress in HSS.

Standard requirement for Charpy notch toughness.

  • New specification will require all HSS to meet a minimum CVN value of 25 ft-lb @ 40° F, which corresponds to AASHTO Zone 2.
  • Having the minimum CVN required makes HSS more suitable for use in dynamically loaded structures.

 Downloads and Industry Resources

A1085 Stocking Partners

PDM Steel Service Centers
3535 East Myrtle Street
Stockton, CA  95205
(800) 800-4736 

Crest Steel
6580 General Road
Riverside CA, 92509

Brown Strauss Steel
800 S. Chestnut
Salt Lake City, UT 84104
Brown Strauss  - Fontana
14970 Jurupa Ave.
Fontana, CA 92337

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