Automotive Steel Supplier | Chassis, Structural, AHSS & EV Steel

Global Automotive Steel Supplier with Full Grade Coverage

CJM is a China-based automotive steel supplier providing certified automotive grade steel for OEM manufacturers, Tier-1 suppliers, and international distributors. We supply automotive steel plate, coil, and cut-to-length sheets covering chassis steel, AHSS, hot stamping steel, and EV structural steel.

With over 15 years of export experience, annual inventory exceeding 1 million tons, and stable mill partnerships, CJM supports automotive steel sourcing for projects across Europe, the Americas, the Middle East, and Southeast Asia. Our products are supplied with mill test certificates and can be processed to custom dimensions.

Automotive Steel Supply Capabilities

• Automotive steel plate, coil, and cut-to-length sheets
• Thickness range: 0.5–25 mm
• Width: up to 2200 mm
• MOQ: from 1 ton per grade
• Lead time: 7–25 days depending on grade and processing
• Export packaging: seaworthy, rust-protected
• Mill test certificates: EN 10204 3.1
• OEM standard compliance available
• IATF 16949–ready grades

Chassis & Frame Steel (Truck Frame / Longitudinal Beams)

We supply chassis steel plate and coil for heavy-duty truck frames, longitudinal beams, and cross members, with stable export availability and custom cutting services.

Applications:

Heavy-duty truck frames, longitudinal beams, cross members, suspension mounts, subframes.

Grade	Standard	Yield Strength (MPa)	Thickness Range	Features
QSTE550TM	EN 10149-2	≥ 550	3.0–10 mm	High-strength forming
S500MC / S700MC / S960MC	EN 10149-2	≥ 500 / 700 / 960	3.0–12 mm	Lightweighting + high load capacity
B510L / B550L	OEM Spec	≥ 510 / 550	3.5–9.0 mm	Stable supply for truck builders
SAPH440 / SPFH590	JIS	440 / 590 min	2.5–8 mm	Asia-market compatibility

Key Properties: Excellent fatigue resistance, weldability, and cold forming for chassis reliability.

Automotive Structural Steel (BIW Safety Components)

We supply automotive structural steel for BIW safety components, including AHSS and ultra-high-strength grades.

Applications:

A/B/C pillars, side members, reinforcement rails, crash zones, floor crossmembers.

Grade	Type	Yield / Tensile (MPa)	Elongation (%)	Thickness
DP600 / DP780 / DP980 / DP1180	Dual Phase (AHSS)	340–900 / 600–1180	≥ 15	0.8–2.5 mm
TRIP780 / TRIP980	Transformation-Induced	550–700 / 780–980	≥ 18	0.8–1.8 mm
QP980 / QP1180	Quenching & Partitioning	600–900 / 980–1180	≥ 12	0.8–1.5 mm
B420LA / HC340LA	HSLA	≥ 420 / 340	≥ 22	1.0–2.5 mm
Martensitic MS1180 / CR1180Y1470T	Ultra High Strength	≥ 1180 / ≥ 1470	Low ductility	0.9–1.5 mm

Key Properties: Crash energy absorption, lightweighting, high strength-to-weight ratio.

Hot Forming Steel (Safety & Complex Structures)

We supply hot stamping steel for safety-critical automotive structures with ultra-high post-forming strength.

Applications:

Tunnel reinforcements, door rings, B-pillars, floor impact parts, cross beams.

Grade	Coating	Post-Form Strength	Thickness	Notes
22MnB5	Al-Si	Up to 1500 MPa	1.0–2.2 mm	Standard hot stamping steel
Usibor® 1500 / Ductibor® 500	OEM Spec	1500 / 500 MPa	1.2–2.0 mm	Al-Si coated for oxidation resistance
BTR165 / BTR200	Hot Stamping	1650–2000 MPa	1.2–1.8 mm	Used in EV safety cages

Key Properties: Ultra high strength after forming, precision shaping, excellent thermal stability.

Exterior & Inner Panel Steel (Visible & Formed Body Parts)

We supply automotive steel sheet and coil for exterior and inner body panels, including cold rolled, galvanized, and bake hardening grades.

Applications:

Hoods, roof panels, fenders, doors, seat rails, trunk lids, wheel housings.

Grade	Coating	Application	Thickness	Features
DC01 / DC04 / DC05	—	Inner panels	0.5–1.8 mm	Good surface & stamping performance
DX51D+Z / DC51D+Z	GI	Exterior panels	0.6–2.0 mm	Anti-corrosion with zinc coating
GA340 / GA590	GA	Welded outer parts	0.7–1.5 mm	Excellent weldability & paintability
BH180 / BH220	Bake Hardening	Doors, hoods	0.6–1.5 mm	Increased strength after painting
IF Steel (Interstitial Free)	—	Fuel tank & inner shells	0.6–1.2 mm	Excellent deep drawability

Key Properties: Surface finish, stamping behavior, and corrosion resistance for high-appearance panels.

EV Platform Steel (Electric Vehicle Specialized Grades)

We supply EV structural steel for battery trays, underbody protection, and crash structures.

Applications:

Battery tray protection, underbody structures, crash beams, ring structures.

Grade	Type	Tensile Strength	Special Features
QP980 / QP1180	Q&P AHSS	≥ 980 / 1180 MPa	Excellent strength + formability
CR980Y1180T / MS1500	Martensitic	≥ 1180–1500 MPa	EV body-in-white structure
22MnB5+Al-Si / ZM Coated Steel	Hot Forming / Zn-Mg	≥ 1500 MPa	High corrosion & thermal performance
S550GD+ZM / QP980+ZM	Zn-Mg Coated	550–980 MPa	Perfect for EV battery compartments

Key Properties: Thermal protection, corrosion resistance, extreme strength for safety-critical EV parts.

Why CJM?

• Over 15 Years of Automotive Steel Export Experience
• Annual Inventory Over 1 Million Tons
• Europe, the Americas, Middle East, and Southeast Asia
• Application-Based Product Cataloging
• Professional Slitting, Oiling, Precision Cutting Services
• Mill Test Certifications, OEM Standards, IATF16949-Ready Grades

Processing Services

• Slitting, Blanking, Decoiling, Shearing
• Laser and Plasma Cutting
• Coil-to-Sheet Conversion
• Export Seaworthy Packaging
• ISO/IATF Certified Inspection & Logistics

FAQ – Automotive Steel Supply

• Q1: Are you an automotive steel supplier or trader?
  A: CJM is an export-oriented automotive steel supplier with stable mill partnerships and in-house processing capabilities.
• Q2: What automotive steel products do you supply?
  A: We supply automotive steel plate, coil, and cut-to-length sheets including chassis steel, AHSS, hot stamping steel, galvanized steel, and EV structural steel.
• Q3: What is your MOQ for automotive steel orders?
  A: Our standard MOQ starts from 1 ton per grade, depending on thickness and processing requirements.
• Q4: Do you provide mill test certificates?
  A: Yes. All automotive steel orders are supplied with EN 10204 3.1 mill test certificates.
• Q5: Can you supply automotive steel for OEM projects?
  A: Yes. We support OEM and Tier-1 projects with custom dimensions, grade matching, and standard compliance.

Contact Us for Quotations or Samples

Tell us your component or application, and we’ll match the most suitable automotive steel grade from our global stock.

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment