What is ASTM A572 Grade 50 Steel ?
The ASTM A572 specification is the Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel for used in general construction and structural applications. ASTM A572 includes five grades with specified minimum yield strengths of 42, 50, 55, 60, and 65 ksi, respectively. For applications where notch toughness is important, consult SSAB for specific Charpy V-notch toughness requirements. ASTM A572 grades are used in a wide variety of structural applications in many market segments.
ASTM A572 grade 50 is low alloy columbium-vanadium structural steel grade with high strength. It is intended for riveted or bolted construction of bridges. ASTM A572 grade 50 equivalent JIS steel material is SS490.
ASTM A572 grade 50 is characterized by high chromium (19 % – 32 %) and molybdenum (up to 5 %) and lower nickel contents than austenitic stainless steels. ASTM A572 steel and ASTM A572 grade 50 equivalent JIS steel material are often used in applications where extra strength is desired.
ASTM A572 Grade 50 is a high-strength, low-alloy (HSLA) columbium-vanadium structural steel known for its excellent strength-to-weight ratio, featuring a minimum yield strength of 50 ksi (345 MPa) and minimum tensile strength of 65 ksi (450 MPa), making it ideal for bridges, buildings, construction equipment, and truck parts where superior strength in thinner profiles is needed. It offers improved toughness and fatigue resistance, often supplied in normalized or normalized-and-tempered conditions, and is commonly used in structural shapes like beams, channels, and angles, and can be welded, bolted, or riveted.
Key Characteristics
Type: High-Strength Low-Alloy (HSLA) Columbium-Vanadium Steel.
Yield Strength: Minimum 50 ksi (345 MPa).
Tensile Strength: Minimum 65 ksi (450 MPa).
Strength-to-Weight: High, allowing for thinner sections.
Applications: Bridges, buildings, construction equipment, transmission towers, machinery, and truck parts.
Forms: Available as plates, beams, channels, and angles.
Applications & Benefits
Structural Efficiency: Its high strength allows for lighter structures compared to conventional steels.
Versatility: Used in general construction and heavy-duty applications.
Weldability: Generally easy to weld, though less so than some other steels, often used in riveted or bolted constructions.
Mechanical Properties
|
Grade |
Thickness |
Yield strength |
Tensile strength |
Elongation in 2" 1) |
Elongation in 8" 1) |
|---|---|---|---|---|---|
|
ASTM A572 Grade 50 |
0.100 - 4.00 |
50 |
65 |
21 |
18 |
Material Chemistry
|
Fe |
C |
Mn |
P |
Si |
S |
|
98.0% |
0.23 – 0.290% |
1.35% |
0.040% |
0.40% |
0.050% |
1 What is astm a572 grade 50 ?
ASTM A572 Grade 50 is a high-strength, low-alloy (HSLA) structural steel known for its 50 ksi (345 MPa) minimum yield strength, making it ideal for applications needing strength-to-weight efficiency, such as bridges, construction, and cranes, offering better performance than A36 steel, with typical properties including 65 ksi (450 MPa) tensile strength and good atmospheric corrosion resistance
2what is astm a572 grade 50 equivalent to?
ASTM A572 Grade 50 equivalent materials across international standards include EN S355JR, DIN St52-3, JIS SM490A, and GB Q345B/Q355B, all offering similar high-strength, low-alloy (HSLA) properties with a minimum yield strength of 50 ksi (345 MPa) for structural applications like bridges and machinery.
3What are the typical application fields astm a572 grade 50 ?
ASTM A572 Grade 50 steel, a high-strength low-alloy (HSLA) steel, is a versatile "workhorse" material used extensively in construction for bridges, buildings, and towers, as well as in heavy machinery, truck frames, wind energy components, and other applications requiring a high strength-to-weight ratio. Its excellent weldability and corrosion resistance make it ideal for structural shapes like beams and channels in demanding load-bearing roles.
4What is astm a572 grade 50 material?
ASTM A572 Grade 50 is a high-strength, low-alloy (HSLA) structural steel known for its excellent strength-to-weight ratio, durability, weldability, and increased atmospheric corrosion resistance, making it ideal for demanding construction, heavy machinery, and infrastructure projects like bridges and buildings where lighter sections provide required strength. This versatile steel offers a minimum yield strength of 50 ksi (50,000 psi) and is available in plates, shapes, and bars.
5What is the hardness of astm a572 grade 50 ?
ASTM A572 Grade 50 steel typically has a Brinell hardness (HBW) of approximately 135, though it can vary slightly, and is also around 74 on the Rockwell B (Rb) scale, reflecting its High-Strength Low-Alloy (HSLA) composition designed for excellent strength-to-weight ratio, not extreme hardness, with minimum yield strength of 50 ksi.
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