D7 Tool Steel Round & Flat Bar
Arch Metals supplies D7 tool steel round and flat bar from Dallas, Texas, to tool and die shops across Texas and the surrounding states. D7 is a high-carbon, high-chromium cold-work tool steel with about 4% vanadium, giving it one of the highest levels of abrasion resistance among conventional tool steels. We supply annealed D7 to ASTM A681 with certified material and saw cutting to size. Request a quote and we’ll confirm sizes and availability.
D7 Tool Steel Forms
- Round bar, annealed
- Flat bar, annealed
- Saw-cut blanks and blocks
Size availability changes with mill supply. Send us your sizes through our quote request form and we’ll confirm stock, lead time and pricing.
D7 Tool Steel Condition and Specifications
- Annealed bar (ASTM A681): supplied soft for machining. D7 is difficult to machine and grind, so allow for it in planning.
- Heat treatment (Air quench): air hardening with typical working hardness of about 58–64 HRC.
- Equivalent designations (UNS T30407)
Not sure which condition or specification your drawing calls for? Send us the print requirements and we’ll match the material.
Typical Properties of D7 Tool Steel
- Annealed hardness: about 235–262 HB
- Working hardness: about 58–64 HRC after hardening and tempering
- Wear resistance: very high, due to vanadium carbides
- Density: 0.277 lb/in³ (7.67 g/cm³)
- Chemistry: about 2.35% carbon, 12% chromium, 1% molybdenum and 4% vanadium
These are typical values for D7 tool steel. Guaranteed minimums vary by specification, condition and size, so check the governing spec or your mill cert for design values.
Why Toolmakers Choose D7 Tool Steel
D7 is built for tooling that wears out from abrasion rather than breaking from impact. Its very high carbon and vanadium content forms hard carbides that outlast D2 in abrasive work. Toughness is lower, so for impact-loaded tools choose S7 tool steel, and for a balance of wear and toughness see A3 tool steel. Common uses for D7 include:
- Brick and ceramic molds
- Liners and wear plates
- Abrasive blanking and forming dies
- Shot-blast and slurry wear parts
D7 Tool Steel FAQs
How does D7 compare with D2 tool steel?
D7 has much more carbon and vanadium than D2, so it is significantly more wear resistant, but it is harder to machine and grind and somewhat less tough.
Is D7 hard to machine?
Yes. In the annealed condition it machines more slowly than A- or S-series steels, and grinding after hardening needs suitable wheels.
When should I not use D7?
Avoid D7 for tools that see heavy shock or impact. A tougher grade such as S7 is a better choice there.
Cut-to-Size D7 Tool Steel With Delivery Across Texas
We ship D7 tool steel throughout Texas, Oklahoma, Louisiana, New Mexico and Arizona, and we saw bar and plate to the size you need. See our processing services for cutting options, or browse all the metals we supply. We also supply A3, S7 and H11 tool steel.
To get pricing, send us the grade, condition, form, size, length and quantity through our quote request form, or call (888) 444-6061.