Jsc440W (B280VK) 280MPa Grade High-Strength Steel for Spare Tire Well Reinforcement

• Customization: Available
• Type: Steel Plate
• Standard: ASTM, AISI, GB, JIS, DIN, BS
• Model NO.: JSC440W-KF-0620
• Certification: ISO, RoHS, IBR
• Surface Treatment: Coated
• Technique: Cold Rolled
• Application: Mold & Dies, Ship Plate, Boiler Plate, Container Plate, Flange Plate
• Special Use: Cutting Tools, Measuring Tools, Cutters in Common Steel, High-strength Steel Plate, Wear Resistant Steel, Silicon Steel
• Stock: Stock
• Transport Package: Standard Export Package
• Trademark: MESCO
• Origin: China(Mainland)
• Production Capacity: 10000tons/Year

Product Description

JSC440W (B280VK) 280MPa Bake-Hardening Steel

Engineered for Optimal Spare Tire Well Reinforcement in Modern Vehicles

 

Product Overview

JSC440W is a zinc-coated bake-hardening (BH) steel specifically formulated for automotive spare tire well reinforcements. Leveraging its unique post-paint strength increase (40-60MPa yield boost), it delivers superior dent resistance and crash energy management while enabling 20% weight reduction versus conventional mild steels. Compliant with global EV/ICE platform safety standards.

 

Certifications & Standards

System	Certification
Material	EN 10268 HX280BD JIS G 3135 SPFC440
Quality	IATF 16949 ISO 50001
Safety	GB 38031-2020 ECE R94
Eco-Compliance	REACH Annex XVII IMDS ID: 89324

 

Key Technical Specifications

Parameter	Value
As-Delivered YS (Rp0.2)	220-280 MPa
Post-Bake YS (170°C/20min)	260-340 MPa
Tensile Strength	350-430 MPa
Total Elongation (A80)	≥32%
Bake Hardening (BH2)	≥40 MPa
Coating Type/Mass	GI (60-90 g/m²)
Thickness Range	0.7-1.8 mm (±0.03 mm)
Width Range	900-1600 mm (±1 mm)

 

Core Engineering Advantages

1. Weight Reduction & Stiffness

• Thinning Potential: 0.96 mm replaces 1.2 mm mild steel → 0.8 kg/part savings

• Torsional Rigidity: 45% higher specific stiffness vs. DC04 (CAE-verified)

2. Enhanced Crash Safety

• Impact Protection: Reduces tire intrusion by 38% in 25 km/h rear collisions

• Energy Absorption: 15 kJ/m crush efficiency (FMVSS 223 compliant)

3. Superior Dent Resistance

• Critical Load: 550 N @ 3 mm dent depth (+65% vs. mild steel)

• Parking Load Durability: Withstands 100+ cycles of 300 N cyclic loading

4. Corrosion Defense

• Salt Spray Performance: <3% red rust after 1,200 hrs (ISO 9227)

• Edge Protection: Zn-rich primer compatibility at cut edges

 

Performance Benchmarking

Property	JSC440W	DC04 Mild Steel	Improvement
Dent Resistance (0.1mm)	210 N	140 N	+50%
Springback Angle	0.6°	2.2°	↓73%
Spot Welding Window	6.8-8.2 kA	7.0-9.0 kA	Wider by 15%
Paint Adhesion	Gt0 (ISO 2409)	Gt1	Higher grade

 

Validated Application: Nissan X-Trail T32 Rear Floor

Parameter	Value
Component	Spare tire well reinforcement frame
Thickness	1.0 mm
Process	5-stage progressive die stamping
Results	1.2 kg weight saving per vehicle
	99.3% production yield
	Zero field failures (5-year track)

 

Manufacturing Excellence

Process	Technology
Forming	≤12% stretch flangeability
Welding	2.5 kJ/mm heat input (no spatter)
Joining	Compatible with structural adhesives
Painting	Electrophoresis coating adherence

 

Sustainability Profile

• Carbon Footprint: 1.4 tCO2/t (EPD certified)

• Recycled Content: ≥30%

• Circular Economy: 100% recyclable per ISO 14021

 

Supply Chain Advantages

• Global Mill Network: POSCO (KR) Baosteel (CN) Nippon Steel (JP)

• Lead Time: 15 days expedited delivery (Asia-Pacific hubs)

• Traceability: Blockchain-based material passports

 

Why Automotive Engineers Specify JSC440W?

 Space Optimization: Enables 5% deeper well design for larger tires
 Cost Efficiency: Saves $4.80/vehicle vs. aluminum solutions
 Process Stability: BH effect compensates springback variation
 Environmental Compliance: Meets EU ELV 2000/53/EC directives

 

Technical Support Services

• CAE Simulation: LS-DYNA crash modeling for rear impact scenarios

• Tooling Design: Progressive die optimization for BH steels

• Prototyping: Short-run sample coils for tryout

 

Contact our Automotive Team for:
1 Free samples 2 Stamping guidelines 3 Project-specific material data sets

JSC440W: Where intelligent strength transforms hidden spaces into safety assets.

 

Extended Applications:

• EV battery tray impact shields

• Pickup truck bed reinforcements

• Rear subframe mounting brackets

 Note: Ask for our NVH damping performance data (SAE J1637 tested)

 

 

 

 

 

 

OUR TEAM

FAQ
1.Q: How long is your delivery time?
A: Within 7-15 days after receiving the deposit or L/C at sight. Longer lead time will be required for special designed products.
2.Q: Do you provide samples ? is it free or extra charged?
A:Surely, product sample is complimentary but the delivery fee will be covered by our customers.
3.Q:What's your payment terms?
A:Our Payment trems will be
(1) 100% T/T
(2) 30% in advance,others before shipment.
4. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
5.what can you buy from us?
Excellent quality steel at competitive prices