KZ70 70T 4-Axle

RailMac KZ70 70T 4-Axle

The KZ70 ballast hopper wagon was designed by CRRC Taiyuan in 2005 to meet the equipment requirements of China’s rapidly developing heavy‑haul railway transportation. It was developed as an advanced solution for ballast transportation under heavy‑load working conditions.
Compared with the K13NK ballast hopper, the KZ70 features significant improvements in multiple performance indicators, especially in load‑bearing capacity and carbody structural strength. With enhanced structural design and higher reliability, it better adapts to heavy‑haul railway operation and long‑term service. The wagon delivers higher efficiency, greater stability, and longer service life in railway maintenance and ballast distribution.
As part of SinoMac, RailMac provides full life‑cycle services for the KZ70 ballast hopper wagon, covering design, system supply, installation and commissioning, after‑sales training, spare parts supply, troubleshooting and overhaul technical support, ensuring stable and efficient operation throughout its service life.

Advantages of KZ70 70T 4-Axle

Main bearing parts adopt 450MPa yield strength high-strength weathering steel and special cold-formed steel, effectively reducing dead weight and significantly improving the net load capacity for ballast transportation.
The wagon body steel structure is optimized for enhanced strength reserve, with hyperboloid U-shaped cold-formed steel side columns that boost sidewall rigidity, strength, and reliability, ensuring stable performance under heavy loads.
Equipped with E-grade steel 17-type high-strength couplers and MT-2 large-capacity buffers, the coupler buffer system delivers improved durability and impact resistance, ensuring safe and stable marshalling and operation.
K5/K6 bogies enable a fully loaded driving speed of 120 km/h, while effectively reducing wheel-rail forces to minimize wear on rails and wheels, extending service life and lowering maintenance costs.

Technical Specifications

Trains Model:	KZ70 70T 4-Axle
Loading Capacity:	70 t
Gauge:	1435 mm
Axle Load:	23 t/axle
Max Speed (Full Load):	120 km/h
Loading Volume:	42 m³

coming soon

Model	Loading Capacity	Gauge	Axle Load	Max Speed (Full Load）	Loading Volume
KZ70 70T 4-Axle	70 t	1435 mm	23 t/axle	120 km/h	42 m³
KZ80 80T 4-Axle	80 t	1435 mm	27 t/axle	120 km/h	48 m³
K13NK 60T 4-Axle	60 t	1435 mm	21 t/axle	120 km/h	36 m³
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Main Parameters
Model	KZ70 70T 4-Axle	Loading capacity	70t
Gauge	1435mm (Standard Gauge)	Axle load	23t/axle
Maximum operating speed	120km/h	Loading volume	42m³
Main bearing material	High-strength weathering steel (yield strength: 450MPa) + special cold-formed steel	Weight & load benefit	Effectively reduces dead weight, improves net load
Body steel structure	Optimized to increase strength reserve	Side column structure	Hyperboloid U-shaped cold-formed steel, improves sidewall rigidity, strength and reliability
Coupler	E-grade steel 17 type high-strength coupler	Buffer	MT-2 type large-capacity buffer
Bogie	K5 or K6 type bogies	Wheel-rail benefit	Reduces wheel-rail action force, relieves rail and wheel wear
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Q1: Do you have the design capability to provide customized railway vehicles?

A: Yes, we have a professional technical team and are familiar with international railway standards such as UIC, AAR, EN, etc. We are able to provide railway equipment according to customer requirements.

Q2: The Chinese railway gauge is 1435 mm, but the railway gauge in our country is 1000 mm. Will this be a problem for you?

A: Of course not, we are able to design railway vehicles with different gauges, such as 1435 mm, 1000 mm, 1067 mm, 1520 mm or other required railway gauges.

Q3: Compared with your competitors, why should I choose you?

A: Tieke Railway was transformed from China Railway Freight Car Factory in 2016. The company has more than 10 years of experience in railway vehicle manufacturing; now, as Tieke Railway is a private company with modern market management strategies, our services are flexible, considerate, and the cost is more controllable.

Q4: What should I provide to get your quotation?

A: You can send an inquiry with detailed drawings, product photos, detailed technical parameters or demand description. Complete demand input is very important for us to provide you with an accurate quotation.