Products Description
CR420LA+Z cold-rolled galvanized steel coil is a high-strength low-alloy galvanized steel suitable for automotive structural parts, engineering machinery and other fields.
CR: Cold Rolled
420: Yield strength ≥ 420MPa (high-strength steel grade)
LA: Low Alloy (containing micro-alloy elements such as Nb/Ti)
+Z: Hot-dip galvanized (Zinc Coated)
Performance parameters
CR420LA+Z Steel Coil
|
Indicators |
Typical value |
Test standard |
|
Yield strength (Rp0.2) |
≥420 MPa |
GB/T 228.1 |
|
Tensile strength (Rm) |
500-620 MPa |
GB/T 228.1 |
|
Elongation (A80mm) |
≥16% |
GB/T 228.1 |
|
Coating weight (double-sided) |
Z60-Z180 optional |
GB/T 1839 |
|
Bending performance (180°) |
d=2a no crack |
GB/T 232 |
Application Advantages
CR420LA+Z steel
① Ultra-high strength and lightweight
It is more than 30% lighter than ordinary steel (Q235), suitable for weight-sensitive parts such as battery pack frames of new energy vehicles.
② Good strength-plasticity product
Strength-plasticity product ≥ 8000MPa·% (tensile strength × elongation), balancing safety and molding requirements.
③ Galvanizing anti-corrosion system
Hot-dip galvanizing layer (Z60-Z180 optional) + micro-alloy strengthening, corrosion resistance and fatigue resistance, Z120 coating can meet 15-year anti-corrosion requirements (standard road environment).
④ Processing friendly
More than 16% elongation, compatible with stamping, welding and other automotive manufacturing processes
Application Scenario
CR420LA+Z Galvanized Steel Coil is used in：
🚘 Automobile manufacturing
Safety structural parts: A/B column reinforcement plate, door anti-collision beam
Chassis system: control arm, torsion beam, battery pack frame
Commercial vehicle: truck beam accessories, trailer connection plate
🏗️ Engineering machinery
Forklift mast, aerial work platform structural parts
Agricultural machinery wear-resistant parts (special coating required)
🔌 Power communication
5G base station bracket, transformer box (Z120 or above coating)
Why choose CR420LA+Z?
✅ Stronger than CR300LA+Z: 40% stronger, suitable for load-bearing structural parts
✅ More economical than DP steel: about 25% lower cost than DP600+Z, outstanding cost performance
✅ More reliable than aluminum: mature welding technology, maintenance cost is only 1/3 of aluminum alloy
Processing Guide
CR420LA+Z Galvanized Cold Rolled Steel Coil
Punching Recommendation: Use DC53 die steel, speed ≤ 20 times/minute
Welding Parameters: Spot welding current 10-12kA (1.2mm plate thickness example)
Cutting Note: Laser cutting power needs to be increased by 15% (compared to ordinary galvanized steel)
Packaging and Service
📦 Packaging method: anti-rust film + steel strapping (customizable wooden pallet/iron frame)
⏱️ Delivery cycle: 7 days for conventional specifications, 15-25 days for customized specifications
📄 Certification support: Provide SGS report, IATF16949 system documents
Frequently Asked Questions by Customers
❓ Q1: Can it replace hot-rolled steel S355MC?
→ A1: Yes! Thinner and lighter (such as using 2.0mm CR420LA+Z to replace 3.0mm S355MC), but the stiffness requirements need to be verified.
❓ Q2: How to choose between Z80 and Z120 coatings?
→ A2:
Z80: Suitable for dry environments (such as in-vehicle structural parts)
Z120: Recommended for chassis parts/outdoor equipment
❓ Q3: Does it support free sample testing?
→ A3: Provide ≤1㎡ free samples (thickness ≤2.0mm), and come with an electronic version of the "Processing Technology Guide".
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