HSLA steels are microalloyed steels offering improved strength over conventional carbon steels without significant loss of formability or weldability. We supply HSLA340, HSLA420, S355MC, and S420MC grades. These steels are used for chassis components, suspension parts, truck frames, crane booms, and structural members where weight reduction and higher payload capacity are required. Available in hot rolled coil and sheet form with typical thickness from 1.5mm to 16mm.
High Strength Low Alloy Steel (HSLA) achieves yield strength 315–700 MPa through microalloying (Nb, V, Ti) and TMCP without expensive heat treatment. Available as structural plate (S355–S690), automotive coil (S315MC–S700MC), pressure vessel plate (P355NH–P460NH), and offshore grades (API 2W/2Y). Thickness 1.5–200mm. EN 10025 / ASTM A572 / API 2W certified. Mill test certificate provided.
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GB 40Cr is a chromium alloy steel round bar per GB/T 3077, equivalent to AISI 5140 / EN 41Cr4 / SCr440. Offers higher strength than carbon steel, reliable hardenability, and excellent induction hardening response. Diameter 10mm-500mm, ideal for shafts, gears, bolts, and medium-duty mechanical components.
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GB 42CrMo is a chromium-molybdenum alloy steel round bar per GB/T 3077, equivalent to AISI 4140 / EN 42CrMo4 / SCM440. Offers high strength, excellent hardenability, superior toughness, and good fatigue resistance. Diameter 16mm-600mm, available in hot rolled, Q&T, and nitrided conditions for oil & gas, wind power, and heavy machinery.
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AISI 4340 is a premium Ni-Cr-Mo alloy steel round bar with the highest hardenability, extreme tensile strength (up to 1800 MPa), outstanding low-temperature toughness, and superior fatigue resistance. Diameter 20mm-600mm, VAR/ESR grades available for aerospace and defense applications.
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AISI 4140 is a chromium-molybdenum alloy steel round bar with excellent hardenability, high strength, superior toughness, and good fatigue resistance. Diameter from 16mm to 800mm, available in hot rolled, normalized, annealed, and Q&T conditions for demanding applications in oil & gas, automotive, aerospace, and heavy machinery.
View Details →Overview of High Strength Low Alloy Steel (HSLA) High Strength Low Alloy Steel (HSLA) is a category of engineered structural and automotive steel achieving yield strengths from 315 MPa to 700 MPa through the synergistic combination of grain refinement, precipitation…
Overview of GB 40Cr Alloy Steel Round Bar GB 40Cr is a widely used chromium alloy structural steel round bar specified under the Chinese national standard GB/T 3077 (Alloy Structure Steels). With carbon content of 0.37-0.44% and chromium content of…
Overview of GB 42CrMo Alloy Steel Round Bar GB 42CrMo is one of the most widely used and trusted alloy steel round bar grades in China and global markets, specified under the Chinese national standard GB/T 3077 (Alloy Structure Steels).…
Overview of AISI 4340 Alloy Steel Round Bar AISI 4340 is a premium nickel-chromium-molybdenum (Ni-Cr-Mo) alloy steel round bar recognized as one of the highest-strength, most versatile through-hardening alloy steels available in global engineering. With carbon content of 0.38-0.43%, nickel…
Overview of AISI 4140 Alloy Steel Round Bar AISI 4140 is one of the most versatile and widely specified alloy steel round bars in global engineering and manufacturing. Classified as a chromium-molybdenum (Cr-Mo) alloy steel with carbon content of 0.38-0.43%,…
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