D2 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

High-carbon, air-hardening tool steel that provides good resistance to wear. D-2 provides a good blend of toughness, strength, and affordability. Typically used in rolls, punches, shear knives, food processing knives

Common Trade Names

UNS T30402, AISI Type D2, High Carbon Tool Steel, High Chromium Tool Steel, Aristocrat

Other Resources

Weight Calculator | Mill Test Reports

Products

D2 Drill Rod | D2 Rectangle Bar | D2 Square Bar

Applications

Gauges
Blades
Punches
Tooling

Specifications

ASTM	SAE
A681	J437

Hardness	Heat Treat Temp.	Quench Medium	Applications	Advantages
D-2 Tool Steel Heat Treatment
As Shipped: Rockwell 97-102B After Heat Treating: Rockwell 59-62C	1600°-1650°F	Air or Oil	D2 can be used in the same applications as both O1 and W1.	D2 has high wear resistance, good toughness, and low distortion. It is often chosen when long tool life is required.

	Annealed	Hardened
Physical Properties D2
Density	0.278 lb/in3	0.278 lb/in3
Ultimate Tensile Strength	110 ksi	290 ksi
Yield Tensile Strength	68 ksi	220 ksi
Shear Modulus	11,000 ksi	11,000 ksi
Shear Strength	67 ksi	170 ksi
Fatigue Strength	45 ksi	120 ksi
Hardness Rockwell \| Brinell	B97-102 \| 220-255	C59-62 \| 634-688
Elongation at Break Percentage	16%	5.1%
Modulus of Elasticity	30,000 ksi	30,000 ksi
Poisson's Ratio	0.29	0.29
Machinability Percentage	50%	N/A
Melting Point	2,540-2,650 °F	2,540-2,650 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	216 BTU-in/hr-ft^2-°F	216 BTU-in/hr-ft^2-°F
Electrical Conductivity	4.3% IACS	4.3% IACS

Chemistry Information
Element	Percentage
C	1.4 - 1.6
Cr	11 - 13
Co	1 max
Mn	0.6 max
Mo	0.7 - 1.2
P	0.03 max
Si	0.6 max
S	0.03 max
V	1.1 max

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