QU120 Rail

The QU120 heavy-duty crane rail is engineered for extreme load conditions, offering unmatched strength and durability. Constructed from U71Mn or U75V alloy steel , it complies with YB/T 5055-2014 standards . Its robust design includes a head width of 120 mm, base width of 170 mm, and web thickness of 44 mm, with a theoretical weight of 118.10 kg/m . This rail is optimized for long-term performance under repetitive heavy loads.

QU120 Rail Key features

Rail height: 170mm ; base width: 170mm
Web thickness: 44mm; head width: 120mm.
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 (118.1kg/m)

Extreme Load Capacity:
Supports crane systems with axle loads up to 250 tons .
High tensile strength (≥ 880 MPa) and yield strength (≥ 550 MPa) .
Enhanced Wear Resistance:
Heat-treated hardness of 320-380 HBW ensures resistance to abrasive wear.
Advanced metallurgy reduces rail deformation by 40% compared to standard rails .
Structural Integrity:
Hot-rolled or quenched-and-tempered processes eliminate internal stress .
Meets strict dimensional tolerances (±0.3 mm) for seamless integration into crane systems .

QU120 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

Heavy Industry: Used in shipyards (e.g., Jiangmen Shipyard, China) for shipbuilding cranes .
Power Plants: Supports overhead cranes in coal handling and boiler maintenance.
Automotive Manufacturing: Installed in assembly lines for robotic material handling .
Aerospace: Suitable for aircraft hangar cranes requiring precision and reliability .

Why Choose US？

As a leading crane rail Supplier in China, we use localized manufacturing expertise to offer competitive pricing and rapid delivery. Our Qu120 crane rail is trusted globally for its consistent quality, safety, and we have more than 15 years experience focused on steel rails.