Centrifugally Cast HSLA Steel

An approach that meets your specs but beats the competition on overall cost-efficiency

Many manufacturers assume that high-strength, low-alloy (HSLA) steel isn’t strong enough for cylindrical parts. That may be the case with other foundries — but not with Spuncast.

By combining centrifugal casting with the proper secondary processes and decades of foundry experience, Spuncast produces a reliable, repeatable HSLA Steel. It’s HSLA that can meet the specs of the most demanding industries, all with cost efficiencies that extend beyond the purchase price.

Spuncast’s centrifugally cast HSLA tubes have built-in savings

Our approach starts with the process our foundry was built for: Centrifugal casting.

The centrifugal casting process creates denser and less porous material, where most of the metal can be recovered. That means less waste. In addition, the flexibility of centrifugal casting means your HSLA steel part can be consistently and efficiently recreated. 

  • Low scrap rate
  • Increased ductility and toughness
  • Efficient repeatability

Spuncast is one of the few foundries with extensive experience with HSLA tubing. It’s why we’re known for producing HSLA tubes with mechanical properties that match or exceed other (and more costly) carbon steels. 

Secondary processes improve performance and other production efficiencies

Secondary processes like heat treating and CNC machining can enhance the properties of HSLA steel to the same levels as a forged equivalent and, in some cases, even exceed it.

Heat Treating

With the proper heat treatment (and the right expertise), the strength, hardness, toughness, ductility, and corrosion resistance of your HSLA steel will improve. Spuncast applies the proper heat treatment based on your requirements:

  • Quenching and tempering to create better balance and stability.
  • Annealing for restoring ductility and allowing additional processing without cracking.
  • Normalizing to provide uniformity and a fine-grained structure.
  • Stress Relief to reduce the risk of unintended dimensional changes.

CNC Machining

CNC machining removes unneeded metal fast and selectively, and it’s a finishing process that works especially well with HSLA steel because it:

  • Requires fewer steps to deliver far more complexity
  • Creates highly repeatable components accurately
  • Adds improved performance to the design
  • Eliminates unnecessary waste

Producing the grade you need with the specs to match

A Spuncast centrifugal cast HSLA steel compares to the following industry standards:

Spuncast AlloysN-16N7Q10B13Q14Q15AC5
Similar Alloy10204020413043308620863052100T5 (AISI501)
Chemical Specifications
Carbon max0.250.35.25-.350.30.15-.25.25-.35.95-
Manganese max0.751.35-1.75.40-.70.60-1.00.65–.95.65-.95.25-.55.40-.70
Silicon max0.80.20-.80.20-.800.80.20-.80.20-.80.20-.800.75
Phosphorus max0.
Sulfur max0.
Chromium.35 max.80-1.10.55-.90.40-.70.40-.701.30-1.604.00-6.50
Nickel.5 max1.40-2.00.40-.70.40-.70.5 max.5 max
OtherCu .50 max
W .25 max
Cu .50 max
W .10 max
Cu .50 max
W .10 max
V .03 max
Cu .50 max
W .10 max
Cu .50 max
W .10 max
Cu .50 max
W .10 max
Cu .50 max
W .10 max
Mechanical Properties
Tensile (min) – KSI (MPa)60(413)90(621)150(1030)125( 860)105(724)127(875)-
Yield (min) – KSI (MPa)30(206)60(414)115(793)100(690)85(586)100(690)-
Elongation (2″ min)22%20%7%15%10%4-14%10%
Brinell Hardness (10mm – 3000Kg -) Typical Values183-217183-217255.00262-285197-262286-352241.00212-440
Density lbs/in0.
Industry Standards*
ASTM StandardA27A732A732A487A732A732A732A217
Similar DIN1.65

How does the approach compare to forged HSLA steel?

Manufacturers who typically used a forged process for their HSLA steel ask us to test the mechanical properties of our grades.  Time after time, they meet the same specs as forging-produced stainless steel, but with the added cost efficiencies.

Used by the most demanding industries

Many industries request an HSLA steel that can hold up to extreme amounts of stress and have distinct mechanical properties to meet the needs required for applications like:

Automotive partsNeed high strength and relatively high formability
Aircraft structuresEndure speed and pressure differences which require high tensile strength
Bridges and suspensionsUndergo extreme tension from both vehicle weight and weather 
MiningDemands a high degree of durability to withstand tremendous tensile stress

These industries produce the following types of products with Spuncast HSLA steels:

  • High-strength roll bodies
  • Hydraulic cylinders
  • Industrial machinery
  • Road building equipment
  • Anywhere rugged service is required

Take Spuncast’s HSLA Challenge

We’re up to the challenge of meeting your specs and beating the competition on overall costs.

Send us the specs on a current parts project you’ve been running or a new one you need to be filled. We’ll provide a quote and full metallurgical make-up to show how we can produce a stronger, more cost-effective tube.

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What is HSLA steel?
HSLA steel is a type of alloy steel that is made to meet specific mechanical properties rather than chemical properties. It’s also lighter weight and therefore is used in tube parts for vehicles, bridges, buildings, or any other structures designed to withstand tremendous amounts of stress.

Why would HSLA steel be used over carbon steel?
HSLA steel is a trusted and widely used material because it is often more affordable and 20 to 30% lighter than carbon steel of the same strength. A tube made from HSLA will have stronger mechanical properties than one made from a typical carbon steel.

In what ways can an HSLA steel tube be better?
Because centrifugal cast HSLA steels are much stronger but lighter in weight, they can be used to produce tubes with thinner outer or inner wall dimensions and will still have better mechanical properties than most other steels. It’s an efficient way of reducing the overall weight of the end product.

Why are HSLA steel tubes not as good when made from other centrifugal foundries?
Determining the optimal composition and the required processes for the appropriate HSLA steel requires a foundry that knows what they’re doing. Spuncast Centrifugal Foundry has over 45 years of experience and offers HSLA steel material in several grades with additional processing capabilities.  We have skilled engineers who can answer any questions you may have about HSLA steel and  our in-house heat treating and CNC machining processes.