Automotive steel encompasses a range of advanced high strength steel (AHSS) grades specifically developed for the automotive industry. These steels enable vehicle lightweighting while maintaining or improving crashworthiness, structural integrity, and passenger safety. We supply dual phase steel (DP), high strength low alloy steel (HSLA), martensitic steel (MS), press hardening steel (PHS), complex phase steel (CP), TRIP steel, bake hardening steel (BH), and IF steel. Common grades include DP590, DP780, DP980, HSLA340, HSLA420, MS1500, 22MnB5, CP800, TRIP780, BH210, and DC04/DC06. Products are available in coil and sheet form with precise dimensional tolerances and consistent mechanical properties required for automotive stamping and forming operations.
TRIP Steel (Transformation-Induced Plasticity Steel) — TRIP590 / TRIP780 / TRIP980 — is advanced high-strength steel combining tensile strength 590-980 MPa with exceptional elongation (24-34%) and n-value (≥0.20-0.24) through strain-induced martensitic transformation of retained austenite. Superior crash energy absorption for automotive longitudinal rails, B-pillars, and structural crash components. Thickness 0.6-3.0mm. IATF 16949 certified.
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Press Hardening Steel (PHS / 22MnB5 / Usibor 1500 equivalent) is hot stamping boron steel achieving 1,500–2,000 MPa tensile strength after die quenching for A-pillar, B-pillar, door ring, and anti-intrusion automotive structural components. AlSi-coated (60/60 g/m²). Thickness 0.7–3.0mm. VDA 239-100 / SAE J2340 / GB/T 32979 certified. IATF 16949. Blank and coil supply. PPAP support.
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Interstitial-Free Steel (IF Steel) — DC04 / DC05 / DC06 / DC07 — is ultra-low carbon cold-rolled deep drawing steel with exceptional plastic strain ratio (r̄ ≥ 1.6-2.1) and total elongation (A80 ≥ 38-45%) for automotive inner body panels and complex deep drawing applications. Thickness 0.4-2.5mm, width 600-1900mm. IATF 16949 certified with r-value and n-value certification.
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Martensitic Steel (MS1200 / MS1300 / MS1500 / MS1700) is Ultra High Strength Automotive Steel (UHSS) with 90–100% martensitic microstructure achieving tensile strength 1,200–2,000 MPa for B-pillar reinforcements, bumper beams, door intrusion beams, and EV battery enclosure structural sections. Thickness 0.5–3.5mm, width 600–2,100mm. EN 10346 / VDA 239-100 / JFS A2001 certified. IATF 16949. PPAP support.
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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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High Edge Ductility Steel (HEdge 690 / HEdge 780 / HEdge 980) is next-generation AHSS combining tensile strength 690-980 MPa with extraordinary hole expansion ratio (HER ≥60-80%) through a homogeneous bainite-dominant microstructure, enabling reliable edge forming, flanging, and punched hole applications impossible with conventional DP steel. Thickness 0.6-3.0mm. IATF 16949 certified.
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Dual Phase Steel (DP590 / DP780 / DP980 / DP1180) is Advanced High-Strength Steel (AHSS) with ferrite-martensite dual-phase microstructure for automotive structural safety components. Tensile strength 590–1,180 MPa, excellent formability, high crash energy absorption. Thickness 0.5–4.0mm, width 600–2,100mm. IATF 16949 certified. PPAP support. Mill test certificate provided.
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Complex Phase Steel (CP800 / CP1000 / CP1200 / CP1400) is advanced high-strength multiphase steel for automotive structural and safety components combining tensile strength 800-1400 MPa with superior hole expansion ratio (HER ≥50%) for excellent edge stretchability and crash energy absorption. Thickness 0.5-8.0mm, width 600-1900mm. IATF 16949 certified.
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Bake Hardening Steel (BH210 / BH240 / BH260 / BH300) is cold-rolled ultra-low carbon steel for automotive outer body panels combining excellent formability during stamping with 30-50 MPa yield strength increase after paint baking. Thickness 0.4-2.5mm, width 600-1900mm. IATF 16949 certified.
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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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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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