ASTM Specifications
A relatively recent HSS specification, ASTM A1085 was introduced to cover structural applications requiring a minimum yield strength of 50 ksi. Bull Moose meets A1085 with products in round, square, and rectangular configurations. The ASTM A1085 spec also provides enhanced performance for seismic and other related fatigue-suppressing applications. Due to tighter tolerances, ASTM A1085 allows for FULL Structural Design Capacity of the profile, allowing the structural engineer to reduce welding requirements, lowering fabrication cost and increasing fabrication productivity.
When A500 Isn’t Up to the Task
ASTM A1085 stands as a significantly more stringent standard than A500. One key differentiator is that this spec (unlike A500) mandates Charpy V-notch testing achieving a minimum of 25 foot-pounds at 40 degrees (F), ensuring that the A1085 material is well suited for projects demanding a robust material. The strength of A1085 is also reflected in the spec’s 50ksi minimum yield stress rating, which is particularly relevant for seismic building designs. This rating applies to all HSS shaped, as opposed to A500, which only provides 42 ksi for rounds, and 46 for squares and rectangles. Overall, the A1085 material is also produced to tighter tolerances than A500. For example, allowable wall tolerance is half that of A500–enabling capacity designs to be based on the full nominal wall thickness, rather than on a reduced calculation. A500 is perfect for a broad range of applications…but when the demands are higher, it becomes a job for Bull Moose A1085 material.
Common Applications Include:
- Trusses
- Columns
- Bracing
Relevant Documentation
Welding Guide
HSS Sheet
Depend on the strength and reliability of Bull Moose when it comes to hollow Structural Steel Tube.
Our products stand the test of time. Whether exposed to the elements or hidden behind walls, we know that your structure and tenants are counting on us. You need reliable service and products of exceptional strength. You need Bull Moose.
Direct-form manufacturing makes us unique. Direct-form means we can use the highest grade HSLA steel, which is directly formed into a tube. This minimizes the cold-working process, which can change the characteristics of the steel.
BULL MOOSE ADVANTAGES:
- Tubes with strength ranges of 46 KSI to 110 KSI
- Tighter tolerances, sharper edges and straighter tubes
- Widest variety of custom sizes and lengths, including metric sizes and cut-to- length options
OTHER BENEFITS/SERVICES:
- Specialized packaging
- Leading availability and fastest delivery due through 8 North American sites
- Readily available weathering grade steel
- Readily available Charpy V-Notch steel
- In-line NDT weld testing available on all tube
Leading the Herd
Founded in 1962, Bull Moose Tube has been delivering products of formidable quality for more than half a century. With sizes ranging from 1-1/2” square through 18” x 6” rectangle, and wall thicknesses of 1/8” through 5/8” Bull Moose features one of the largest size ranges of HSS products in the industry.
And with eight North American manufacturing and warehouse facilities, Bull Moose has the HSS products you need when you need them.
You need strength and reliability. You need availability.
You need Bull Moose Tube.
EIGHT WORLD-CLASS LOCATIONS DELIVERING BEST-IN-CLASS PRODUCTS
Jumbo HSS
Stratusteel® Brochure
Stratusteel
110 KSI Steel Tube
It’s Might… Made Light™.
The Strongest, Lightest Steel Tubes on the Planet
LIGHTWEIGHT STEEL WITH HEAVYWEIGHT PERFORMANCE
Stratusteel® is a revolutionary hollow structural steel tubing that delivers an extraordinary set of characteristics:
High Strength = Yield strengths as high as 110KSI, enabling your products to support greater loads and span greater distances.
Light Weight = 35% lighter than an equivalent A500 50KSI product!
2x Harder than Steel = Your products become more durable and sustainable; remain better-looking, longer.
CUSTOM SIZES AND PROFILES
Stratusteel is available in a broad range of standard and metric sizes. But our variable tooling mills also allow for custom tube profiles. We can optimize wall thickness and outer dimensions/contours for your specific needs.
Customizing for your exact application saves you from buying bulkier stock than you really need…making Stratusteel a high value custom product for a standard steel price!
Here’s an example:
Your design shows that a 3.83” x 5.75” x 0.197” HSS will work on your product (weighing 11.98 lbs/ft.).
If the nearest size in conventional HSS is 4” x 6” x .025” (weighing 15.62 lbs/ft.), you’ll experience an unnecessary 23% increase in weight and thus a 23% increase in cost!
Stratusteel would enable you to avoid those increases with efficient, optimal dimensions and weight.
HOW DOES STRATUSTEEL BENEFIT YOU?
ENGINEERS: Explore new design options with lighter, more streamlined products. Switching to Stratusteel
from ASTM A500 Grade B can enable a wall thickness reduction of 35%. It may even enable you to reduce the number of steel components in your assembled product.
PURCHASING AGENTS: Every pound of steel you don’t have to buy is a direct savings for your bottom line.
SHIPPERS: Smaller, lighter products mean fuller shipments and lower shipping costs. This enables you to
get the most out of every freight mile—ultimately reduces demands on drivers’ time, and fuel consumption.
MARKETERS: With Stratusteel, your product may potentially be positioned as the lightest, strongest of its kind on the market.
Finishes available:
- Post-pickled in oil
- EPS (Eco-Pickled Surface)
Stratusteel
Contact us to explore the advantages Stratusteel can bring your product line!