High Strength Automotive Steel Plate – DP600 / QStE500TM / HR440B

Product Overview

CJMsteelgroup is an experienced exporter of carbon and alloy steels from China, with over 1 million tons of annual inventory. We offer precision-rolled cold rolled automotive steel plates and coils, with fast delivery, strict quality control, and global export experience to Southeast Asia, the Middle East, Africa, Europe, and the Americas.

Our inventory includes internationally recognized cold rolled automotive steel grades:

• CR340Y, CR420Y, CR590Y (SAE J2340 standard)
• B340LA, B410LA, B510LA (EN 10152 / JIS G3113)
• SAPH370, SAPH400, SAPH440 (JIS G3135)
• DP500, DP600, DP800 (Dual Phase steels for high-strength use)

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📏 Size Range

Item	Specification
Thickness	0.6 – 3.0 mm
Width	800 – 1800 mm
Length	1000 – 6000 mm (or coil)
Coil Weight	5 – 25 tons
Delivery Condition	Cold Rolled (CR), Pickled & Oiled (P&O), Skin-Passed
Surface Finish	Bright, Matte, Galvanized (on request)

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⚙️ Chemical Composition (% by mass)

Grade	C	Mn	Si	P	S	Al
CR340Y	≤0.08	≤1.50	≤0.50	≤0.025	≤0.025	≥0.015
B340LA	≤0.10	≤1.50	≤0.50	≤0.025	≤0.025	≥0.015
DP600	≤0.12	≤1.80	≤0.50	≤0.020	≤0.010	≥0.015
SAPH370	≤0.10	≤1.60	≤0.50	≤0.030	≤0.030	–

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🧪 Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Key Feature
CR340Y	≥340	≥440	≥28	Deep drawing, high elongation
B340LA	≥340	≥450	≥28	Low alloy, lightweight forming
DP600	≥340	590–650	≥16	High strength, dual phase
SAPH370	≥370	≥440	≥25	Stamping-grade steel

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🚗 Typical Applications

Application	Applicable Grades
Car body inner panels	CR340Y, B340LA, SAPH370
Chassis components	DP600, B410LA
Door beams & reinforcements	DP600, CR590Y
Suspension parts	SAPH400, SAPH440
Battery cases (EV)	CR340Y, CR420Y
Safety cages & crumple zones	DP800, B510LA

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🏭 Why Choose CJMsteelgroup?

• Over 15 Years of Automotive Steel Export Experience
• Annual Inventory Over 1 Million Tons
• Europe, South America, Middle East, India, and Global Markets
• Application-Based Product Cataloging
• Professional Slitting, Oiling, Precision Cutting Services

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📦 Packaging & Delivery

• Export-grade seaworthy packing: steel strip, waterproof paper, pallets
• Custom wrapping with edge protection
• FOB, CFR, CIF available from Tianjin, Qingdao, or Shanghai

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📩 Contact CJMsteelgroup Today

Need cold rolled automotive steel like B340LA, CR420Y, or DP600?
💬 Email us or fill out the RFQ form to get a free quote within 24 hours.

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