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

Shandong Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of Alloy Tool Steel Bar

Property	Parameter	Description
Product Name	Alloy Tool Steel Bar	High-performance steel for tooling and die applications
Material Grade	AISI D2 / EN 1.2379 / JIS SKD11 / GB Cr12Mo1V1	International grade equivalents for cold work tool steel
Standard Compliance	ASTM A681, EN ISO 4957, JIS G4404	Meets major international tool steel standards
Carbon (C)	1.40-1.60%	High carbon content for hardness and wear resistance
Chromium (Cr)	11.0-13.0%	Provides deep hardening and corrosion resistance
Molybdenum (Mo)	0.70-1.20%	Enhances hardenability and toughness
Vanadium (V)	0.15-0.30%	Grain refinement and wear resistance improvement
Manganese (Mn)	0.20-0.60%	Improves hardenability and strength
Silicon (Si)	0.10-0.60%	Deoxidizer and strength enhancer
Hardness (Annealed)	≤255 HBW	Maximum hardness in annealed condition
Hardness (Quenched & Tempered)	58-62 HRC	Achievable hardness after heat treatment
Tensile Strength	≥1900 MPa	Minimum tensile strength after heat treatment
Diameter Range	6mm - 500mm	Available round bar diameter options
Length	3m - 6m or custom	Standard and customized lengths available
Surface Finish	Black, Peeled, Turned, Ground	Multiple surface treatment options
Application	Stamping dies, cutting tools, cold forming dies	Typical industrial applications
Heat Treatment	Annealing, Quenching, Tempering	Required processes for optimal performance
Certification	EN 10204 3.1, ISO 9001, Mill Test Certificate	Quality certifications provided
Packaging	Bundled with steel straps, wooden case for export	Standard export packaging method
MOQ	500 kg	Minimum order quantity

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.

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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.

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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.

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Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Carlos Silva

Brazil

verified purchases

2025-08-15

Perfect for Custom Die Applications
Sourced 900kg of H13 bars with custom sawing service (multiple lengths from 800mm-2400mm, tolerance ±0.8mm) for progressive stamping dies. Value-added cutting service saved 15 hours of our machine shop time. Chemical composition analysis showed vanadium at 0.95%, enhancing wear resistance for our 500,000-cycle production runs. CNC turning service provided concentricity of 0.03mm on 120mm diameter sections. Technical consultation helped us select optimal tempering parameters for 46 HRC working hardness. Outstanding service for specialized tooling requirements.

Ahmed Al-Hassan

UAE

verified purchases

2025-09-06

Acceptable Quality with Initial Documentation Issues
Purchased 550kg of D2 bars (75mm square section) for concrete mold manufacturing. Material mechanical properties met ASTM A681 standards after verification testing. Initial shipment arrived without proper EN 10204 3.1 certificates, causing 5-day project delay. Supplier immediately couriered correct documentation and offered 8% discount on next order as compensation. After resolution, material performed adequately in our high-wear application with acceptable tool life. Communication improved significantly after initial issue.

William Taylor

Australia

verified purchases

2025-09-28

Solid Performance with Minor Delivery Delay
Ordered 450kg of H13 bars (65mm diameter, 3000mm length) for hydraulic press tooling in our shipyard operations. Material quality excellent with rockwell hardness achieving 52 HRC after oil quenching. NACE MR0175 compliance documentation provided for our offshore application. Delivery took 52 days instead of promised 45 days due to customs clearance issues, though supplier kept us informed throughout. Pricing competitive compared to three other quotes we received. Would order again for non-urgent projects.

Robert Brown

United Kingdom

verified purchases

2025-10-19

Reliable Supply for Repeat Orders
This is our 4th purchase of D2 tool steel bars (40mm diameter) totaling over 3 tons for marine component dies. Consistent quality across all batches with carbide distribution uniformity verified through our metallographic analysis. Annual supply agreement locked pricing for 12 months despite market fluctuations. Delivery schedule aligned perfectly with our production planning, receiving 500kg shipments every 6 weeks. Same-specification replacement guarantee provided confidence for our ISO 9001 audit requirements. Excellent long-term partnership for ongoing manufacturing needs.

Wei Chen

Singapore

verified purchases

2025-11-10

Premium H13 with Excellent Technical Support
Sourced 2.5 tons of H13 bars (diameters ranging 100mm-200mm) for hot forging die blocks in our semiconductor equipment manufacturing. Supplier's metallurgist provided detailed heat treatment recommendations specific to our application requiring 450°C working temperature. Electroslag remelting process eliminated center porosity issues we experienced with conventional H13. Hardness uniformity across 200mm diameter sections varied only 1.5 HRC. Consignment inventory program reduced our working capital by 30%. Highly recommended for critical hot-work tooling.

Hans Mueller

Germany

verified purchases

2025-12-01

Good Value A2 Bars for Extrusion Tooling
Ordered 800kg of A2 grade rectangular bars (60mm x 80mm cross-section) for aluminum extrusion die components. Pricing was 12% lower than our local distributor while maintaining comparable quality. Material certificates documented proper vacuum degassing process. Minor surface decarburization of 0.3mm depth required additional machining allowance, but supplier proactively informed us before shipment. Delivery in 38 days was acceptable for mill-direct order. Overall solid value for production tooling applications.

James Wilson

United Kingdom

verified purchases

2025-12-23

Outstanding D2 Quality with Fast Response
Purchased 650kg of D2 cold-work steel bars (50mm round, 6000mm length) for precision cutting tool manufacturing. Technical sales team responded within 2 hours with complete material traceability documentation. Carbon content at 1.52% and chromium at 12.1% met our strict aerospace tooling requirements. EN 10204 Type 3.1 certificates included tensile test data showing 2,100 MPa after triple tempering. Cut-to-length service was accurate to ±0.5mm. We've now placed our second order for ongoing production.

Michael Johnson

United States

verified purchases

2026-01-07

Excellent H13 Bars for Injection Molding Dies
Ordered 1.2 tons of H13 grade bars (80mm diameter, 3000mm length) for our automotive injection molding die project. Mill certificates confirmed chromium at 5.12% and molybdenum at 1.35%, perfectly within ASTM A681 specifications. After our heat treatment to 48 HRC, dimensional stability was outstanding with less than 0.02mm distortion. Ultrasonic testing reports showed zero defects above 2mm FBH. Delivery took 6 days to our Michigan facility. This material significantly outperformed our previous supplier's H13 stock.