Alloy Tool Steel Bar - High-Strength Heat-Treated AISI H13 & D2 Grades

Technical Specifications of Alloy Tool Steel Bar

Alloy Tool Steel Bar - High-Strength Heat-Treated AISI H13 & D2 Grades

Alloy tool steel bar represents a premium category of specialty steel products engineered for demanding applications requiring exceptional hardness, wear resistance, and dimensional stability under extreme conditions. Manufactured through precision hot rolling and heat treatment processes, these bars serve critical roles in die-making, cutting tool production, and high-stress industrial components where standard carbon steels prove inadequate. Our mill-direct supply chain ensures cost-effective pricing for manufacturers in automotive, aerospace, and precision machining sectors seeking reliable material performance.

What is Alloy Tool Steel Bar?

Alloy tool steel bar is a specialized ferrous product containing controlled additions of chromium, molybdenum, vanadium, and tungsten to enhance hardenability, hot hardness, and resistance to abrasive wear. These bars are produced to ASTM A681 and AISI standards, with popular grades like H13 (chromium hot-work steel) and D2 (high-carbon high-chromium cold-work steel) offering tensile strengths exceeding 1,800 MPa after proper heat treatment. The material finds extensive application in injection molding dies, extrusion tooling, and precision cutting applications where thermal fatigue resistance is paramount.

Alloy Tool Steel Bar Technical Specifications

Our inventory includes AISI H13 bars with chromium content of 4.75-5.50% and molybdenum at 1.10-1.75%, providing superior thermal shock resistance per ASTM A681-08 Section 7.3. D2 grade bars feature carbon levels of 1.40-1.60% combined with 11.00-13.00% chromium, delivering Rockwell hardness of 58-62 HRC after oil quenching and triple tempering. Available diameters range from 12mm to 350mm with standard lengths of 3000mm and 6000mm, all supplied with mill test certificates documenting chemical composition and mechanical properties according to EN 10204 Type 3.1 requirements.

Why Choose Our Alloy Tool Steel Bar Supply

We maintain strategic partnerships with ISO 9001:2015 certified mills specializing in vacuum degassing and electroslag remelting processes that eliminate macro-segregation and ensure uniform carbide distribution. Our quality control protocol includes ultrasonic testing per ASTM A388 to detect internal discontinuities, with acceptance criteria of FBH diameter less than 3mm. Direct mill relationships enable us to offer factory-competitive pricing with flexible minimum order quantities starting at 500 kg, supported by comprehensive material traceability and same-specification replacement guarantees.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 500 kilograms per specification, though we accommodate smaller trial orders of 200 kg for new product development projects. Volume purchasers ordering 5+ metric tons qualify for mill-direct pricing with customized delivery schedules aligned to production planning requirements.

Do you provide material test certificates?

Yes, every shipment includes EN 10204 Type 3.1 certificates issued by the manufacturing mill, documenting chemical composition analyzed per ASTM E1019 and mechanical properties verified through tensile testing according to ASTM E8. Additional certifications such as NACE MR0175 compliance or third-party inspection reports can be arranged upon request.

What is the typical delivery time?

Stock items in common grades (H13, D2, A2) ship within 5-7 business days from our regional distribution centers. Special sizes requiring mill production typically require 35-45 days lead time, with expedited processing available for urgent tooling projects at a 15% premium charge.

Can you cut to custom sizes?

Our value-added services include precision sawing to tolerances of ±1mm, CNC turning for round bars down to 0.05mm concentricity, and milling operations for rectangular cross-sections. Heat treatment services encompassing vacuum hardening and cryogenic processing are available through certified subcontractors, with complete dimensional inspection reports provided for critical aerospace applications.

Get a Competitive Quote for Alloy Tool Steel Bar

Request a detailed quotation by submitting your specifications including grade designation, dimensions, quantity, and delivery location. Our technical sales team responds within 4 hours during business days with pricing, availability confirmation, and material substitution recommendations if applicable. For ongoing production requirements, we offer annual supply agreements with price protection clauses and consignment inventory programs to optimize your working capital.