JIS 37kg Rail
Product Overview
JIS 37kg heavy rail steel (also known as JIS 37A) is engineered to meet the rigorous standards of JIS E 1101-93 (Japanese Industrial Standards), delivering exceptional durability for heavy-load applications. Constructed from U71Mn high-strength steel, it offers a balance of high tensile strength (≥880 MPa), yield strength (≥685 MPa), and hardness (HBW ≥260), making it suitable for long-term use in harsh industrial and railway settings.
Key Features
Dimensions:
Weight: 37.2kg/m
Head Width: 62.71 mm
Rail Height: 122.24 mm
Base Width: 122.24 mm
Web Thickness: 13.49 mm
Length: customized from 6m to 24m.
Optional Steel Grades:
55Q | 50Mn | U71Mn(Material details are at the bottom)
Standards: JIS E 1103-91/JIS E 1101-93
Applications
Mainline Railways
Heavy-haul freight lines and passenger railways requiring high-strength rails for long-term performance.
Mining & Quarrying
Permanent haulage tracks for ore transport in underground mines and open-pit operations, supporting heavy machinery and repetitive loads.
Industrial Facilities
High-capacity internal logistics systems in factories, ports, and manufacturing plants for material handling.
Crane Systems
Trolley rails and crane tracks in warehouses and workshops, providing stable support for overhead lifting equipment.
Narrow-Gauge Railways
Heavy-duty tourist railways and industrial trams requiring medium-to-heavy load capacity.
Materials：
………………………………………………………………………………………………………………………………………………………………………………………………
| 55Q | Mechanical property | Chemical composition(%) | |||||||||
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | |||
| MPa | kg/mm² | MPa | kg/mm² | min | HBW | ≤ | ≤ | ||||
| ≥ | ≥ | ≥ | ≥ | ≥ | |||||||
| 685 | 69 | 197 | 0.50-0.60 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.04 | ||||
| 50Mn | 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 | ≤ | ≤ | ≤ | ≤ | ≤ | ||||
| ≥880 | 9% | 0.48-0.56 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 | 0.25 | 0.25 | 0.25 | |||||
| U71Mn | 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 | ≤ | ≤ | ≤ | ≤ | ≤ | ||||
| ≥880 | 9% | 0.65-0.76 | 0.15-0.35 | 1.10-1.40 | 0.03 | 0.03 | 0.25 | 0.25 | 0.25 | |||||
Why Choose Glory Rail?
As a leading rail Supplier in China, we offer competitive pricing and rapid delivery. Our JIS Standard rail track 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.