High Strength Automotive Steel Plate – DP600 / QStE500TM / HR440B

Product Overview

High Strength Automotive Steel Plate is essential in modern vehicle construction, providing excellent strength-to-weight ratio and crash resistance. CJMsteelgroup provides a wide selection of high strength automotive steel plates, including popular international grades such as:

• DP500, DP600, DP800 (Dual Phase Steels)
• QStE500TM, QStE600TM (EN Standard)
• HR440B (China GB Standard)
• CR340Y, B340LA, SAPH440 (JIS/SAE Low Alloy Automotive Steels)

These grades offer varying strength, elongation, and formability to meet different structural needs.

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📏 Size Range

Parameter	Specification
Thickness	1.2 mm – 12 mm
Width	800 mm – 2000 mm
Length	2000 mm – 12000 mm
Delivery Condition	Hot Rolled / Cold Rolled / Pickled / Oiled
Surface	Mill finish, oiled, galvanized (on request)

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⚙️ Chemical Composition (% by mass)

DP500 / DP600 / DP800

Grade	C	Mn	Si	P	S	Al
DP500	≤0.12	≤1.80	≤0.50	≤0.020	≤0.010	≥0.015
DP600	≤0.12	≤1.80	≤0.50	≤0.020	≤0.010	≥0.015
DP800	≤0.15	≤2.00	≤0.50	≤0.020	≤0.010	≥0.015

QStE500TM / QStE600TM

Grade	C	Mn	P	S	Al
QStE500TM	≤0.12	≤1.60	≤0.025	≤0.015	≥0.020
QStE600TM	≤0.14	≤1.60	≤0.025	≤0.015	≥0.020

HR440B (GB/T 3273)

Grade	C	Mn	Si	P	S
HR440B	≤0.15	≤1.60	≤0.50	≤0.030	≤0.025

CR340Y / B340LA / SAPH440

Grade	C	Mn	Si	P	S
CR340Y	≤0.08	≤1.50	≤0.50	≤0.025	≤0.025
B340LA	≤0.10	≤1.50	≤0.50	≤0.025	≤0.025
SAPH440	≤0.12	≤1.60	≤0.50	≤0.030	≤0.030

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🧪 Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Application
DP500	≥320	500–620	≥17	Crash zones, floor structures
DP600	≥340	590–650	≥16	Door beams, side members
DP800	≥500	800–950	≥14	B-pillars, impact bars
QStE500TM	≥500	600–750	≥18	Frames, axles
QStE600TM	≥600	700–850	≥16	Underbody components
HR440B	≥440	510–660	≥20	Chassis, side rails
CR340Y	≥340	≥440	≥28	Inner panels, brackets
B340LA	≥340	≥450	≥28	Body panels, reinforcements
SAPH440	≥440	≥510	≥22	Suspension parts, wheel housing

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✅ Notes on Steel Grades

• DP steels (Dual Phase): Excellent for safety parts requiring energy absorption.
• QStE series: High yield strength with good cold formability, widely used in structural and chassis components.
• B-LA series & SAPH: Designed for deep drawing and stamped parts.
• All grades are suitable for cold forming, spot welding, laser cutting, and coil blanking.

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🏭 Why Choose CJMsteelgroup?

• ✅ Certified supply of automotive-grade high strength steel plates
• ✅ Large stock of DP600 / QStE500TM / SAPH440 for fast delivery
• ✅ Support for custom size & thickness
• ✅ One-stop service: cutting, leveling, packaging, and global logistics
• ✅ Export experience to 40+ countries

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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

Looking for DP600, QStE600TM, or SAPH440 high strength automotive steel plate?
💬 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