ASCE 75 Rail
Product Overview
ASCE 75 Rail — 75 lb/yd (37.20 kg/m)-Mid-light rail section engineered for durability, interchangeability and cost efficiency. Widely used in mining railways, metro/light rail, industrial yards and crane tracks. ASCE 75 is essentially known by the commonly used designation TR37 in South America.
Primary value proposition: Global interchangeability, factory-tested mechanical properties, optional head hardening, full traceability and one-stop supply of rails and accessories.
Key Product Facts
Nominal mass: 75 lb/yd (37.20 kg/m)
Section dimensions (H / Base): 122.24 mm / 122.24 mm
Typical material grades: 900A / 1100 /55Q
Head hardness (options): Non-hardened ≥ R260; Head-hardened ≥ R320Cr (customizable)
Standard lengths: 12 m (cutting available 6–24 m)
Straightness tolerance: ≤ 0.5 mm per meter; total runout ≤ 4 mm per rail length
Standard tests / documents provided: MTC, chemical report, tensile (ASTM E8), impact (ASTM E23), hardness (ASTM E18), NDT (UT/ET)
MOQ & capacity: MOQ 10 tonnes; monthly capacity 3,000 tonnes
Lead times: Standard orders regularly 7 days ready to deliver; custom/heat-treated 2–6 weeks
ASCE 75 vs JIS 37A vs TR37 Side-by-Side Comparison
| Dimension / Property | ASCE 75 | JIS 37A | TR37 |
|---|---|---|---|
| Nominal mass | 37.2 kg/m (75 lb/yd) | 37.2 kg/m | 37.2 kg/m |
| Section (H / Base) | 122.24 / 122.24 mm | 122.24 / 122.24 mm | 122.24 / 122.24 mm |
| Governing standard | ASTM A1 / AREMA | JIS E1101 / E1103 | ASTM A1 / AREMA |
| Typical material grades | 900A / 1100 | 50Mn / 55Q | 900A / 1100 |
| Minimum tensile strength | ≥ 790 MPa (1100 grade) | ≥ 880 MPa | ≥ 790 MPa |
| Minimum yield strength | ≥ 480 MPa | ≥ 500 MPa | ≥ 480 MPa |
| Head hardness (hardened) | ≥ R320Cr | ≥ HB320 | Same as ASCE 75 |
| Common markets | North America, Middle East, Southeast Asia | Japan, Korea, parts of SE Asia | South America (Brazil, Argentina) |
| Core advantage | Global interchangeability; abundant accessory supply | Higher specified strength and reliability | Market compatibility in South America; common in mining |
Optional Services & Customization
Head hardening (specify target hardness and layer depth)
Special alloy steels or higher strength grades (by agreement)
Surface treatments: anti-corrosive coatings as per ISO or purchaser specification
Full rail accessory supply: fishplates, bolts, clips, concrete/wood sleepers
FAT (Factory Acceptance Test) checklist and on-site support packages
Quality Assurance & Documentation
Traceability: Heat number and batch markings on each rail.
Delivered documentation: Mill Test Certificate (MTC); chemical analysis; tensile, impact and hardness reports; NDT report; dimensional inspection report; packing list.
Third-party inspection: Available on request (buyer or mutually agreed inspector).
Certifications: ISO 9001 (factory certificate on request).
Typical Applications
Mine internal haulage lines and ore transport tracks
Metro/light rail surface and elevated lines where medium load capacity is required
Industrial yard and port rail lines for material handling
Crane and gantry tracks for light to medium cranes
Temporary construction rail and tourist/park railways
Supply, Packaging & Logistics
Minimum order quantity: 10 tonnes (negotiable for long-term contracts)
Monthly capacity: 3,000 tonnes
Standard delivery packaging: Bundles of 5–10 rails, wooden blocking, anti-oxidation coating as required.
Shipping terms: FOB / CIF / DDP negotiable.
Lead times: Standard orders 2–4 weeks; head-hardened or special alloys 4–6 weeks.
Handling recommendations: Provide lifting points and bundle weight limits; avoid point loads on tread; store on level sleepers or timber blocks.
FAQs
Q： Is ASCE 75 interchangeable with JIS 37A or TR37?
A: Geometrically they share the same nominal section; interchangeability is high. Confirm material grade and mechanical/hardness requirements in project specs because JIS 37A commonly specifies higher tensile/yield limits.
Q : Do you supply head-hardened rails suitable for heavy rolling contact?
A: Yes. Head-hardened rails are available. Specify target surface hardness, required hardened layer depth and any post-hardening machining or welding restrictions.
Q: What documentation is provided with shipment?
A: MTC, chemical and mechanical test reports, hardness and impact reports, NDT results, dimensional inspection report and packing list.
Why Choose ASCE 75 Rail？
Experience: Successfully deployed in North America, Middle East and Southeast Asia in heavy-duty mining and urban rail projects. On-site installation support and field training available.
Expertise: Manufactured by controlled hot-rolling and optional head-hardening processes. Material and mechanical properties meet the performance expectations for 900A/1100 grade rail steels (tensile, yield, elongation, low-temperature impact).
Authoritativeness: Produced to recognized industry standards (ASTM A1 / AREMA practices). Complete test documentation shipped with each lot for procurement and compliance.
Trustworthiness: Batch traceability (heat number per rail), documented inspection records, ISO 9001 certified manufacturing (certificate available), and clear warranty/claims procedure.