ALLOY STEEL
ALLOY STEEL
All grades listed can be supplied in sheet, plate, bar, and other forms based on availability.
4130 = AMS 6348, 6370, 6528, 6371, 6360, 6373 | 17-22® = AMS 6302, 6303, 6304, 630 |
4140 = AMS 6349, 6379, 6382, 6452, 6381 | 300M = AMS 6417, 6419 |
4142 H MOD = AMS 6378 | HY-TUF® = AMS 641 |
4320 = AMS 6299 | D6AC ® = AMS 6431, AMS 6438, AMS 6439 |
4330 MOD = AMS 6311, 6427 | 52100 = AMS 6440, 6444, 6447 |
4335 MOD = AMS 6426, 6429, 6430 | 135 MOD® = AMS 6470H, 6471, 6472 |
4337 = AMS 6412, 6413 | H-11® = AMS 6485, 6487, 6488 |
4340 = AMS 6409, 6414, 6415 | M50 = AMS 6490, 6491 |
4617 = AMS 6292 | Maraging 250 = AMS 6512 |
4620 = AMS 6294 | Maraging 300 = AMS 6414 |
4640 = AMS 6312, 6317 | 4140 = AMS 6395, 6381 |
6150 = AMS 6448, 6450 | 4335 MOD = AMS 6433, 6434, 6435, 6428 |
8615 = AMS 6270 | 4340 = AMS 6359, 6454, 6415 |
8620 = AMS 6274, 6276, 6277 | 8740 = AMS 6358 |
8630 = AMS 6280, 6281, 6530, 6550 | AERMET® 100 = AMS 6532, AMS6532, AMS-6532 |
8735 = AMS 6320, 6282, 6535 | 17-22A® = AMS 6385, 6436 |
8740 = AMS 6322, 6324, 6325, 6327, 6323 | HP 9-4-20® = AMS 6523, 6524 |
8750 = AMS 6328H | HP 9-4-25®= AMS 6546 |
9310 = AMS 6265, 6260, 6267 |
Alloy Steel Supplier
High-Performance Alloy Steel for Industrial and Government Applications
T&T Materials supplies premium alloy steel products for manufacturers, machine shops, fabricators, government contractors, aerospace suppliers, defense contractors, energy companies, and industrial operations throughout North America. Engineered for superior strength, toughness, wear resistance, and heat treatment capability, alloy steel is the preferred choice for demanding applications where standard carbon steel cannot provide the required performance. Whether your project requires high-strength round bar, plate, sheet, tubing, or custom-cut material, our experienced team can help source the alloy steel grade that meets your exact specifications.
What Is Alloy Steel?
Alloy steel is carbon steel that has been enhanced with carefully controlled amounts of alloying elements such as chromium, nickel, molybdenum, manganese, vanadium, silicon, or tungsten. These additional elements improve the steel's mechanical properties, making it stronger, tougher, more corrosion resistant, and better suited for extreme temperatures and high-stress environments.
Unlike mild carbon steel, alloy steel can be heat treated to achieve exceptional hardness, fatigue resistance, and durability while maintaining excellent machinability in many grades.
Because of its versatility, alloy steel has become one of the most widely used engineering materials across manufacturing, transportation, defense, oil & gas, and heavy equipment industries.
Benefits of Alloy Steel
Alloy steel offers numerous advantages over traditional carbon steel, including:
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Higher tensile and yield strength
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Improved toughness and impact resistance
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Enhanced fatigue resistance
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Excellent wear and abrasion resistance
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Superior hardenability through heat treatment
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Better high-temperature performance
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Increased corrosion resistance in select grades
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Long service life in demanding environments
These characteristics make alloy steel an ideal material when components must withstand heavy loads, repeated stress, or harsh operating conditions.
Common Applications
Alloy steel is used across numerous industries because of its exceptional combination of strength, machinability, and durability.
Typical applications include:
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Aircraft structural components
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Landing gear components
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Gears and gear blanks
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Shafts and axles
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Heavy-duty fasteners
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Hydraulic cylinders
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Oil and gas equipment
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Mining machinery
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Construction equipment
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Defense and military components
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Industrial machinery
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Automotive drive
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Train components
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Bearings and wear parts
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Pressure vessels
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Machine tooling
Available Product Forms
Depending on your project requirements, alloy steel is available in numerous forms, including:
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Round Bar
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Flat Bar
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Plate
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Sheet
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Tubing
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Pipe
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Hex Bar
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Square Bar
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Forgings
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Custom saw-cut blanks
Additional processing services may also be available depending on material and project requirements.
Industries We Serve
Our alloy steel products support customers in:
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Aerospace
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Defense
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Government Contracting
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Energy
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Oil & Gas
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Manufacturing
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Heavy Equipment
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Transportation
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Industrial Fabrication
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Marine
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Power Generation
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Mining
Why Choose T&T?
At T&T Materials, we understand that industrial buyers need more than just material—they need dependable supply, accurate certifications, competitive pricing, and knowledgeable support.
When you partner with T&T Materials, you receive:
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Extensive inventory access
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Domestic and specialty alloy sourcing
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Material test reports (MTRs) available when applicable
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Precision cutting services
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Fast quotations
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Reliable lead times
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Experienced customer support
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Solutions for commercial and government procurement
Our team works closely with engineers, purchasing departments, machine shops, OEMs, and government agencies to ensure every order meets project requirements.
Request a Quote for Alloy Steel
Looking for a trusted alloy steel supplier? Contact T&T Materials today to request pricing, verify availability, or discuss your project requirements. Our team is ready to help you source the right alloy steel grade for your application with fast service and industry expertise.