8620 Alloy Steel
As a seasoned 8620 AISI alloy steel supplier, Pennsylvania Steel Corporation offers more than conventional stock materials. We provide FLEXOR®—a proprietary alloy that delivers enhanced strength, wear resistance, and uniform performance across applications where traditional 8620 alloy steel may not be enough. FLEXOR® is engineered for reliability in complex machining, high-pressure environments, and parts exposed to repeated stress.
Across aerospace, automotive, firearms, and energy sectors, FLEXOR® is trusted as a durable 8620 alloy steel alternative that supports production demands without compromising performance.
SAE 8620 Steel Chemistry Composition vs. FLEXOR®
AISI 8620 is commonly used for carburized parts due to its surface hardness potential, but it can underperform when exposed to long-term cyclic loading, elevated temperatures, or inconsistent machining. FLEXOR® is built to address these challenges with an upgraded chemistry that ensures dependable results, even in complex geometries or heat-treated conditions.
By increasing the carbon and molybdenum content while adding tungsten, FLEXOR® delivers:
- Deeper hardening without carburizing
- Greater toughness at the core
- Reduced distortion during heat treatment
- Reliable hardness through large cross-sections
These attributes make FLEXOR® more suitable for mission-critical parts that require core strength, fatigue resistance, and precise tolerances.
| Alloy | 8620 | FLEXOR® |
|---|---|---|
| Carbon, C | .18-.43 | .32-.36 |
|
Manganese, Mn |
.70-.90 | .60-.80 |
|
Phosphorous, P |
.035(max) | .025(max) |
|
Sulfur, S |
.04(max) | .025(max) |
|
Silicon, Si |
.15-.35 | .15-.30 |
|
Chromium, Cr |
.40-.60 | .75-1.00 |
|
Molybdenum, Mo |
.15-.25 | .40-.60 |
|
Tungsten, W |
- | .40-.70 |
FLEXOR® Offers Greater Machinability Than 8620
Manufacturers who rely on precision machining know that materials like 8620 can pose challenges when processed in large volumes or tight tolerances. FLEXOR® is specifically formulated for excellent machinability—saving time and reducing tool wear.
Machinability benefits include:
- Shorter setup and cycle times
- Smoother chip formation and improved finish
- Less tool chatter and breakage
- Greater repeatability in tight-tolerance jobs
These advantages support faster throughput and better cost control in CNC operations, especially in industries such as metal forming, workholding, and firearms production.
Strength, Toughness, and Durability That Raise the Bar
While 8620 excels at surface hardness after carburizing, FLEXOR® offers a better balance between hardness and core strength—without the additional processing steps. Its mechanical properties are ideal for high-performance components where reliability under load is essential.
FLEXOR® delivers:
- Tensile Strength up to 225 ksi
- Yield Strength up to 205 ksi
- High Core Toughness for impact-prone and heavy-load applications
- Improved fatigue resistance, even in complex or asymmetrical parts
FLEXOR®'s ability to perform in both surface and core makes it a superior 8620 SAE alloy steel supplier option, especially for parts exposed to shock, torque, and wear over time.
FLEXOR® in Application: Why Industries Choose It Over 8620
FLEXOR® is a high-performance material trusted across industries that traditionally specify 8620 steel. Its uniform microstructure, heat-treat response, and mechanical stability make it an ideal alternative for mission-critical applications.
Common uses include:
- Automotive: Axles, gears, and shafts that demand core toughness and fatigue strength
- Oil & Gas: Tool bodies, couplings, and rotating components subject to torque and vibration
- Aerospace: Components that require low distortion and high precision after heat treatment
- Metal Forming: Dies and tooling that benefit from hard surfaces and stable core properties
- Performance Racing: High-stress drivetrain and suspension parts with tight tolerances
- Firearms: Machined parts like receivers, bolt carriers, and triggers requiring strength and finish
- Workholding: Clamping components, bushings, and jigs that demand dimensional integrity
By providing consistent mechanical properties and superior processability, FLEXOR® has become a go-to 8620 alloy steel alternative for design engineers and manufacturing teams.
Contact Pennsylvania Steel Corporation today to learn more about FLEXOR® and its advantages over 8620 alloy steel.
Request a Quote from Your Preferred 8620 SAE Alloy Steel Supplier
If you're currently sourcing 8620 steel or exploring alternatives for better performance, FLEXOR® offers a compelling upgrade. As an ISO 9001-certified 8620 ASI alloy steel supplier, Pennsylvania Steel Corporation stocks FLEXOR® in a range of conditions and sizes—hot rolled, forged, ground and polished, and more.
Let our specialists help you evaluate your application needs and provide material options that align with your manufacturing process and part performance goals.
Testimonials
"At Powerhold we use FLEXOR® exclusively on all our special design work-holding Diaphragms. The performance and machining quality of FLEXOR® is superior to anything we have utilized in the past.
Today’s customer demands a quality product that performs consistently...FLEXOR® enables us to meet that goal every day."
Testimonials
"Just wanted to take a minute to say thanks. I always receive my orders on time and without any complications. I appreciate you keeping me so up to date on the order process through email, and the way the steel is cut and packaged so carefully. Using your Product (FLEXOR®) has increased standard tool life by as much as 25%-30%. Thank you again for all you hard work. I look forward to business with you again and again, it's always a pleasure!"
Testimonials
"Pennyslvania Steel Corporation has been a valued supplier for our company going on two decades. FLEXOR®'S versatility and reliability have been extremely helpful to the products we manufacture. Due to to FLEXOR®'S versatility at various hardness' we are able to use it at 28-32 HRC, 28-32 HRC and nitrided, or through hardened anywhere between 42 and 50 HRC. In our experience FLEXOR® has superior machinability to other comparable steel grades especially in higher hardness'. We machine FLEXOR® at 40 HRC and find this to be a key benefit to our manufacturing process."