SA514 Grade F is a high-yield strength, quenched and tempered alloy steel plate known for its exceptional strength (min 100 ksi yield), toughness, and good weldability, used in heavy-duty structural applications like construction equipment, truck frames, and crane booms, featuring specific alloying elements for enhanced performance and available in various thicknesses.
Key Characteristics
Type: High-Strength Low-Alloy (HSLA) Quenched and Tempered Steel Plate.
Yield Strength: Minimum 100 ksi (690 MPa) for plates up to 2.5 inches thick.
Tensile Strength: Typically 110-130 ksi (760-895 MPa).
Toughness: Excellent low-temperature toughness, often with supplemental Charpy V-notch testing.
Weldability: Good, suitable for demanding structural applications.
Alloying Elements: Contains Nickel, Chromium, Molybdenum, Vanadium, and Copper for strength and properties.
Common Applications
Construction Equipment (cranes, earth-movers)
Transport Trailers & Heavy Vehicle Frames
Bridge Structural Members
Mobile Aerial Work Platforms (Man-lifts)
Agricultural Equipment
Availability & Standards
Governed by ASTM A514/ASME SA514 specifications, with Grade F being one of several options.
Supplied as plates, often in thicknesses from around 0.185" up to 2.5" (or more depending on thickness), with wider and longer dimensions available.
Chemical composition of Heat analysis for SA514 Grade F quenched and tempered steel plate (Max %)
|
Steel Grade |
The Main Elements in rolling SA514Gr.F high strength steel plate |
|||||||
|
C |
Si |
Mn |
P |
S |
N |
B |
||
|
SA514GrF |
0.10-0.20 |
0.15-0.35 |
0.60-1.00 |
0.035 |
0.035 |
0.0005-0.0006 |
||
|
Cr |
Mo |
Cu |
Nb |
Ni |
Ti |
V |
Zr |
|
|
0.40-0.65 |
0.40-0.60 |
0.15-0.50 |
- |
0.70-1.00 |
- |
0.03-0.08 |
- |
|
The price of SA514 Grade F (T-1 Type F) is influenced by a unique combination of factors, reflecting its status as a premium, high-performance alloy steel rather than a commodity. Its cost is significantly higher than standard structural steels like A36 or even other HSLA grades.
Here are the key price drivers, from macro to micro:
1. Macro & Raw Material Factors (The High-Cost Base)
Alloying Elements: This is the primary cost driver. SA514 Gr. F contains significant amounts of expensive alloys like Chromium (Cr), Molybdenum (Mo), Vanadium (V), and Boron (B). Market prices for these ferroalloys are highly volatile and directly impact the melt cost.
Scrap Premium: High-quality, chemistry-controlled scrap is required as feedstock, commanding a premium over generic scrap.
Energy Intensity: The quenching and tempering (Q&T) heat treatment process is extremely energy-intensive, tying its cost directly to natural gas and electricity prices.
2. Manufacturing & Processing Factors (The "Performance" Premium)
Complex Heat Treatment: The precise Q&T process requires specialized furnace equipment, strict temperature controls, and additional handling, adding substantial processing costs absent from as-rolled steels.
Low Production Volume: It is a niche, low-volume product compared to commodity steels. Mills produce it in limited cycles, losing economies of scale.
Stringent Testing & Certification: Mandatory Charpy V-notch impact testing (often at very low temperatures like -50°F), thorough ultrasonic testing (UT), and extensive mill certification (especially for ASME SA514) add significant quality assurance costs.
3. Market & Supply Chain Factors
Limited Supplier Base: Only a few specialized mills worldwide produce true, specification-grade A514/SA514 plate (e.g., ArcelorMittal, SSAB, Nippon Steel/Dillinger). This limited competition affects pricing.
Lead Time & Urgency: It is rarely held in large stock. Made-to-order lead times are long (often 8-16 weeks). Rush orders or specific thicknesses outside standard rolling cycles carry heavy premiums.
Global Project Demand: Prices spike during boom cycles in major consuming industries like mining, heavy crane manufacturing, and wind energy.
4. Purchase & Transaction Factors (Your Specific Order)
Quantity: Unlike commodity steel, volume discounts are less dramatic due to batch-process nature. Minimum order quantities apply.
Dimensions:
Thickness: Thicker plates (> 4 inches) are exponentially more expensive due to harder heat treatment and greater alloy content.
Width/Length: Non-standard oversize dimensions require special rolling and treatment, adding cost.
Additional Processing: Quenching often induces distortion. Post-heat-treatment flattening (leveling) is usually required and adds cost. Precision cutting (plasma, waterjet) also adds more than for mild steel.
Certification Level: Standard Mill Test Reports are included. Third-party inspection (e.g., Lloy's, ABS) or nuclear-grade (NPT) certification adds a substantial fee.
Supplier Tier: Buying direct from the mill is cheapest for large orders. Purchasing from a steel service center adds a margin but provides faster access to pre-processed material.
1. What Is SA514 Grade F Steel?
SA514 Grade F is a high-strength, quenched and tempered alloy steel plate used primarily in structural applications requiring extreme toughness and high yield strength, such as crane booms and mining equipment.
2. What Is The Yield Strength Of SA514 Grade F?
SA514 Grade F has a minimum yield strength of 100 ksi (690 MPa) for thicknesses up to 2.5 inches (63.5 mm). For thicker plates, the minimum yield strength decreases.
3. Is SA514 Grade F Weldable?
Yes, SA514 Grade F can be welded, but it requires strict control procedures due to its high hardenability. Preheating, low-hydrogen electrodes, and controlled heat input are mandatory to prevent hydrogen-induced cracking and maintain properties in the heat-affected zone (HAZ).
4. What Is SA514 Grade F Used For?
It is used in highly stressed structural components like crane booms, truck frames for heavy haulers, mining shovel arms, wind turbine towers (high-stress sections), and support structures in military vehicles and heavy machinery.
5. What Is The Difference Between SA514 And AR500 Steel?
SA514 Grade F is a through-hardened, quenched and tempered structural steel designed for load-bearing components. AR500 is an abrasion-resistant steel with a hard, wear-resistant surface, primarily used for liners in mining and material handling, not for primary structural support.
6. What Is The Chemical Composition Of SA514 Grade F?
Its typical composition includes Carbon (~0.15%), Manganese (~0.95%), Silicon (~0.55%), Chromium (~0.85%), Molybdenum (~0.55%), Vanadium (~0.08%), and Boron (0.001-0.005%) to achieve its high strength and hardenability.
7. What Is The Hardness Of SA514 Grade F?
The typical Brinell hardness range for SA514 Grade F is 235-293 HBW (approximately 22-30 HRC). This balances high strength with good toughness.
8. Can SA514 Grade F Be Machined?
Yes, but with difficulty. It is a very hard, strong steel that requires robust machinery, rigid setups, appropriate cutting tools (grade and geometry), ample cooling, and lower speeds/feeds compared to mild steels.
9. What Is The Equivalent Of SA514 Grade F In Europe?
There is no direct, identical European equivalent. The closest grades in terms of high strength and quenched & tempered condition are S690QL (EN 10025-6) or possibly Hardox 600 for wear applications, though their chemistries and exact properties differ.
10. How Does SA514 Grade F Compare To T1 Steel (A514)?
SA514 Grade F is T1 steel. "A514" is the ASTM designation for structural steel, and "SA514" is the ASME code designation for the same material. Grade F is one of the specific sub-grades under this specification.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.
