CR300LA+Z Cold-rolled Galvanized Steel Coil

CR300LA+Z is a high-strength cold-rolled galvanized steel coil, designed with low alloy (LA) composition and hot-dip galvanizing (Z) process. It has excellent strength, formability and corrosion resistance and is widely used in automotive structural parts, home appliance housings and light steel structures in buildings.

CR: Cold Rolled
300: Yield strength ≥300 MPa (low alloy high strength steel)
LA: Low Alloy (low alloy, containing micro alloying elements such as Nb and Ti)
+Z: Hot dip galvanized (Zinc Coated), common coating codes such as Z60 (60g/m² double-sided)

CR300LA+Z：

CR300LA+Z galvanized steel coil advantages
High strength and lightweight advantages
300MPa grade high yield strength: more than 40% strength improvement compared to traditional galvanized steel (such as DX51D)
Significant weight reduction effect: 15%-20% thickness reduction under the same load
Low alloy strengthening technology: high strength achieved through Nb/Ti microalloying, avoiding the brittleness of traditional high-strength steel

Excellent forming and processing performance
Elongation ≥20%: meet the deep drawing requirements of complex automotive structural parts
Strong coating bonding: zinc layer adhesion test ≥60N/cm² (GB/T 5270)

Long-term anti-corrosion protection
Double-sided galvanized protection: Z60-Z180 optional (corresponding to 6-18μm zinc layer)
Salt spray test performance:
Z80: 1000 hours without red rust (ASTM B117)
Z120: 1500 hours without red rust
Special treatment options: chrome-free passivation, fingerprint-resistant and other environmentally friendly surface treatments

Excellent safety performance
Collision energy absorption: 25% higher than ordinary steel
Fatigue life: Strength retention rate > 90% after 2 million cycles
Welding integrity: spot welding shear strength ≥ 4.5kN (1.2mm plate thickness)

Green environmental characteristics
100% recyclable: in line with ELV directive requirements
Low-carbon process: 30% energy saving compared to hot-rolled steel production
Chrome-free passivation: ROHS 2.0 certified

CR300LA+Z cold-rolled steel coil

Automotive industry: door anti-collision beams, seat frames, chassis reinforcements
Home appliance manufacturing: refrigerator/washing machine housings, air conditioning panels, electrical brackets
Construction: light steel keels, cable trays, ventilation ducts
Others: shelves, storage equipment, agricultural machinery

Packaging method: inner diameter of steel coil Φ508/Φ610mm, covered with anti-rust film + steel strapping, or customized according to customer requirements.
Delivery status: cold rolled annealing + galvanized, warranty certificate (MTC) can be provided.
Delivery cycle: conventional specifications are available from stock

Support customization: the coating, thickness, width and surface treatment process can be adjusted according to needs!

FAQ
❓ Q1: What is the difference between CR300LA+Z and ordinary galvanized steel (such as DX51D+Z)?
→ A: CR300LA+Z has higher strength (yield ≥ 300MPa) and contains low alloy elements (such as Nb, Ti), which is suitable for structural parts that require lightweight design, while DX51D+Z is more suitable for general molding purposes.

❓ Q2: How to choose between galvanized layers Z60 and Z120?
→ A:
Z60 (60g/m² on both sides): suitable for indoor environments (such as home appliances, furniture).

Z120 (120g/m² on both sides): suitable for outdoor or high humidity environments (such as buildings, automotive exterior panels).

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