SA514 Grade E is a high-strength, quenched and tempered alloy steel plate known for excellent toughness, weldability, and impact resistance, especially at low temperatures, used in heavy equipment, construction, and mobile platforms. It offers a minimum yield strength of 100 ksi (up to 2.5" thick) and 90 ksi (over 2.5" to 6" thick), featuring specific alloy additions like Chromium and Molybdenum for enhanced performance in demanding structural applications.
Key Characteristics
High Strength: Provides high yield and tensile strength for lightweight yet strong components.
Toughness: Excellent impact toughness, even in cold environments, making it ideal for low-temperature service.
Weldability: Designed for structural use, it's weldable with proper preheat and restricted heat input.
Chemical Composition: Contains Chromium (1.40-2.00%) and Molybdenum (0.40-0.60%), along with controlled Carbon, Manganese, Silicon, Titanium, and Boron.
Finding a direct, "drop-in" equivalent for SA514 Grade E in European standards is complex due to differences in standardization philosophy, but there are several closely comparable materials.
The most common and accepted European equivalent is S690QL (or S690Q/QL/QL1 according to EN 10025-6), but with important caveats.
Primary Equivalent: S690QL (EN 10025-6)
This is the Quenched and Tempered (Q&T) structural steel grade with a minimum yield strength of 690 MPa, which directly matches the 690 MPa (100 ksi) yield strength of thinner SA514 Grade E plates.
| Property | SA514 Grade E (ASTM A514) | S690QL (EN 10025-6) | Notes |
|---|---|---|---|
| Yield Strength (ReH) | 690 MPa (≤31.75mm) | 690 MPa (≤30mm) | Excellent match for common thicknesses. |
| Tensile Strength | 760-895 MPa | 770-940 MPa | Very similar ranges. |
| Delivery Condition | Quenched & Tempered | Quenched & Tempered (as per "Q") | Identical metallurgical process. |
| Impact Toughness | Charpy V-notch specified at -50°F (-46°C) | Charpy V-notch specified at -40°C or -60°C (QL/QL1) | This is a key difference. S690QL is typically tested at -40°C, while SA514 Gr. E has a very low test temp. S690QL1 (-60°C) is a closer toughness match. |
| Notch Toughness | The "L" denotes lower minimum impact energy. | Must be specified. |
Important: The exact impact toughness requirement must be carefully compared and specified (e.g., S690QL1 for lower service temperatures).
Other Potential Equivalents & Standards
European standards often separate "structural steels" from "pressure vessel steels," whereas ASTM A514 covers both applications.
For Structural Applications (like bridges, cranes):
S690Q as above is the main choice.
Older designations like FeE690 (from EN 10137) may also be encountered.
For Pressure Vessel Applications:
P690QH (EN 10028-6): This is a pressure vessel steel plate with similar strength (690 MPa yield). The "H" denotes higher toughness requirements. This is often a better functional equivalent when the application is for pressurized components, as it aligns with the pressure vessel design codes that sometimes use SA514.
Weldable High-Strength Steels (Historical/Alternative):
Weldox 700 (SSAB brand name) or Hardox 600 (for abrasion-resistant applications) are commercial brand equivalents with similar strength.
Domex, Raex are other brand families.
Critical Considerations for Substitution
You cannot simply replace "SA514 Gr. E" with "S690QL" on a drawing without considering:
Governing Design Code: The project will follow either American codes (AISC, AWS, ASME) or European codes (EN 1993-1-1, Eurocode 3). The material must be permissible and have defined properties within that code.
Thickness Impact: Both grades have reduced yield strength for thicker sections. The thickness ranges must be aligned.
Impact Toughness: This is the most frequent mismatch. Verify the required service temperature and specify the correct sub-grade (e.g., QL1).
Chemical Composition: While both are Q&T steels, the specific alloying elements (Cr, Mo, B in SA514) differ from the typical Mn-Ni-Mo-B system in European steels. This affects weldability and requires procedure qualification.
Welding Consumables: Welding procedures qualified for SA514 Grade E must be re-qualified for S690QL using consumables conforming to European standards (e.g., EN ISO 16834).
Summary and Recommendation
Closest General Equivalent: S690QL1 (for structural use, matching both strength and low-temperature toughness).
Closest Pressure Vessel Equivalent: P690QH (EN 10028-6).
Process for Substitution:
Identify the governing design code.
Compare all specified properties: Yield/Tensile strength, impact toughness at the design temperature, thickness range.
Re-qualify welding procedures and select appropriate European consumables.
Formally approve the substitution with the responsible engineer, noting the change in standard and material designation.
Always consult the latest editions of the relevant standards (EN 10025-6, EN 10028-6) and involve your material supplier or a metallurgist for critical applications.
1. What Is SA514 Grade E Steel?
SA514 Grade E is a high-strength, quenched and tempered alloy steel plate within the ASTM A514/SA514 specification, designed for applications requiring a balance of high yield strength and excellent toughness.
2. What Is The Yield Strength Of SA514 Grade E?
The minimum yield strength of SA514 Grade E is 100 ksi (690 MPa) for thicknesses up to 2.5 inches (63.5 mm). For thicker plates, the minimum yield strength decreases.
3. What Is The Difference Between SA514 Grade E And Grade F?
The primary difference is the chemical composition. Grade E typically contains different levels of alloying elements (like Chromium, Molybdenum, and Boron) compared to Grade F, which can affect hardenability, weldability, and specific application suitability, though both have a 100 ksi min yield.
4. Is SA514 Grade E Weldable?
Yes, but with strict procedures. It requires preheating, the use of low-hydrogen electrodes, and controlled heat input to prevent cracking and maintain mechanical properties in the heat-affected zone (HAZ).
5. What Is SA514 Grade E Used For?
It is used in highly stressed structural components for heavy construction and mining equipment, such as crane booms, excavator arms, and frames where extreme strength and toughness are required.
6. What Is The Chemical Composition Of SA514 Grade E?
Its typical composition includes Carbon (~0.15-0.21%), Manganese (~0.80-1.10%), Silicon (~0.40-0.80%), Chromium (~0.50-0.80%), Molybdenum (~0.18-0.28%), Vanadium (~0.03-0.08%), and Boron (0.0005-0.005%).
7. What Is The Hardness Of SA514 Grade E?
The typical Brinell hardness range for SA514 Grade E is 235-293 HBW (approximately 22-30 HRC), similar to other grades like Grade F, as it is also a quenched and tempered steel.
8. How Does SA514 Grade E Compare To T1 Steel?
SA514 Grade E is a type of T1 steel. "T1" is the historic tradename for A514/SA514 quenched and tempered steels. Grade E is one specific chemical composition variant under this standard.
9. Can SA514 Grade E Be Flame Cut?
Yes, it can be flame cut, but it requires a controlled process. Preheating before cutting and slow, controlled cooling (often by using heating torches) are necessary to prevent the formation of hard, crack-sensitive zones along the cut edge.
10. What Is The Equivalent Of SA514 Grade E In Europe?
There is no direct, identical European equivalent. The closest grades in terms of high strength and quenched & tempered condition are S690QL or S690QL1 (EN 10025-6), though their chemical compositions differ.
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.
