ASTM A1085 Specs
ASTM A1085 HSS is commonly used in applications that are subject to fatigue and buildings with seismic requirements.
|ASTM A500-13 GRADE B||ASTM A1085|
|Scope||Cold-formed welded & seamless||Cold-formed welded|
|Thickness Range||t < 0.875"||0.148" < t < 0.875"|
|Yield Stress||Round||42 ksi min.||All shapes||50 ksi min.|
|Sq/rect.||46 ksi min.||70 ksi max.|
|Tensile Stress||Round||58 ksi min.||65 ksi.|
|Sq/rect.||58 ksi min.|
(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|
ASTM A1085 Provides Fatigue Support & Seismic RequirementsA1085 HSS is rated for building seismic requirements and projects that require significant fatigue support, these include:
- Amusement Rides
- Sign Supports
- Drilling Platforms
Minimum & Maximum Yield Stresses for A1085
- ASTM A1085 HSS is manufactured with a minimum yield stress of 50 ksi and a maximum yield that cannot exceed 70 ksi. These factors reduce capacity design requirements within the seismic design concepts, while providing a more economical and efficient product.
Tighter Material Tolerances for A1085
- Since ASTM A1085 is manufactured with tighter wall thicknesses, it provides increased efficiency over A500 HSS, without having to reduce the nominal wall thickness by 0.93 as designated by the AISC Steel Construction Manual.
Charpy V-Notch Standard Requirements for A1085
- A1085 maintains a minimum CVN value of 25 ft.-lbs. at 40° F, which makes HSS more suitable for use in structures subject to fatigue and those that require a higher level of toughness.