CR73 Crane Rail

The JIS CR73 crane rail is a high-strength, precision-engineered rail designed for medium-to-heavy-duty overhead cranes, gantry cranes, and material handling systems in industrial and port environments. Manufactured to JIS E 1101 and JIS E 1103 standards, it combines robust load-bearing capacity with superior wear resistance, ensuring reliable performance in challenging conditions.

CR73 Rail Key features

Rail height: 135mm ; base width: 140mm
Web thickness: 32mm; head width: 100mm.
Material:
U71Mn High-Strength Rail Steel (default): Tensile strength ≥880MPa, hardness ≥260HBW, ideal for heavy freight and high-speed applications.

Key Specifications:

Profile: Symmetrical wide-flange design (73.3kg/m)

Length:Standard: 10/12 m; custom lengths available upon request.

Heavy-Duty Load Capacity
U71Mn steel structure withstands dynamic loads and frequent start-stop operations, minimizing deformation.
Enhanced Wear Resistance
As-rolled hardness of 260–300 HBW reduces rail head wear compared to conventional carbon steel.
Microalloyed composition (0.65–0.76% C, 1.10–1.40% Mn) ensures resistance to surface fatigue and abrasion.
Precision Engineering
Tight dimensional tolerances (±0.5 mm for height/width; ±0.3 mm for head profile) ensure seamless alignment with crane wheels and fasteners.
Straightness tolerance: ≤2 mm/m , reducing vibration and noise during operation.
Corrosion Protection
Optional hot-dip galvanization or epoxy coatings for outdoor applications in marine or high-humidity environments.

CR73 Crane Rail Material Properties

Grade	Mechanical Property						Chemical Composition (%)
	Yield Strength		Tensile Strength		Elongation	Hardness	C	Si	Mn	S	P	Cr	Ni	Cu
	MPa	kg/mm²	MPa	kg/mm²	Min.	HB	C	Si	Mn				≤	≤
U71Mn	-	-	≥880	-	9%	-	0.65-0.76	0.15-0.35	1.10-1.40	0.03	0.03	0.25	0.25	0.25

Steel Grade U71Mn

Mechanical Property

Yield Strength (MPa) -

Yield Strength (kg/mm²) -

Tensile Strength (MPa) ≥880

Tensile Strength (kg/mm²) -

Elongation (Min.) 9%

Hardness (HB) -

Chemical Composition (%)

Carbon (C) 0.65-0.76

Silicon (Si) 0.15-0.35

Manganese (Mn) 1.10-1.40

Sulfur (S) 0.03

Phosphorus (P) 0.03

Chromium (Cr) 0.25

Nickel (Ni) ≤ 0.25

Copper (Cu) ≤ 0.25

Applications

Ports & Logistics
Container cranes in international ports (e.g., Yokohama) .
Automated storage and retrieval systems (AS/RS) in e-commerce fulfillment centers.
Heavy Industry
Overhead cranes in steel mills and foundries handling molten metal.
Gantry cranes in shipyards for vessel assembly and repair.
Mining & Construction
Underground mining transport systems with moderate load requirements.
Mobile cranes in construction sites for material lifting.
Aerospace & Automotive
Assembly line cranes in aircraft hangars and automotive manufacturing plants.

Key Advantage

Precision Control ±0.1mm
High-Quality Carbon Steel
15 Years of Professional Manufacturing Experience

Why Choose US？

As a leading crane rail Supplier in China, we use localized manufacturing expertise to offer competitive pricing and rapid delivery. Our CR73 crane rail is trusted globally for its consistent quality, safety, and we have more than 15 years experience focused on steel rails.

Explore our full range of steel rails solutions and request a quote today. Partner with us for reliable, high-performance rails that drive efficiency in your operations.