ASTM A1011/A1011M HSLAS-F Grade 550 Introduce

ASTM A1011/A1011M HSLAS-F Grade 550 is an excellent choice for many applications. It is an economical alternative to higher-grade materials and can provide excellent strength and performance with the right processes and treatments. However, it is important to consider the grade and properties of the steel carefully before selecting it for a particular application.

Smelting temperature:1533°C - 1931°C

Application:Standard Specification for Steel Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability

ASTM A1011/A1011M HSLAS-F Grade 550 Material Chemical Composition

The chemical composition of the ASTM A1011/A1011M HSLAS-F Grade 550 steel are as follows:

ElementMinMax
Vanadium (V)0.0050-
Titanium (Ti)0.0050-
Sulfur (S)-0.0250
PhOsphorus (P)-0.0200
Nickel (Ni)-0.2000
Niobium (Nb)0.0050-
Molybdenum (Mo)-0.1600
Manganese (Mn)-1.6500
Copper (Cu)-0.2000
Chromium (Cr)-0.1500
Carbon (C)-0.1500

ASTM A1011/A1011M HSLAS-F Grade 550 Material Mechanical Properties

ASTM A1011/A1011M HSLAS-F Grade 550 is a hot rolled, affinity-annealed, low carbon steel with a substrate of 2.25-3.0 percent carbon and micro-alloying elements. The alloying elements provide a stronger and more uniform material structure and increased tensile strength. This makes it suitable for applications such as structural beams, agricultural uses, and high pressure applications like pressurized gas lines.

The mechanical properties of the ASTM A1011/A1011M HSLAS-F Grade 550 steel are as follows:

YieldRp0.2 ≤ 636 (MPa)
TeileRm≤ 372 (MPa)
ImpactKV/Ku22(J)
ElongationA41%
Reduction in cross section on fractureZ23%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)131

ASTM A1011/A1011M HSLAS-F Grade 550 Material Thermal Properties

The thermal performance parameters of the ASTM A1011/A1011M HSLAS-F Grade 550 steel are as follows:

Temperature (°C)24231742
Modulus of elasticity (GPa)-825-
Mean coefficient of thermal expaion ×10-6/(°C)--42
Thermal conductivity (W/m·°C)-41.313.2
Specific thermal capacity (J/kg·°C)-243-
Specific electrical resistivity (Ω mm²/m)0.24--
Deity (kg/dm³)--241
Poisson’s coefficient, ν--121

ASTM A1011/A1011M HSLAS-F Grade 550 Material Machining Technology

ASTM A1011/A1011M HSLAS-F Grade 550 steel is a structural steel supported by the American Society for Testing and Materials (ASTM) for structural shapes, bars and sheets types. This high-strength steel is used in the manufacturing of bridges, buildings, industrial machinery and frameworks, among other products. This material is readily available and is often used in lieu of regular carbon steels when strength requirements outweigh cost considerations.