Modeling Shear Strength of Medium- to Ultra-High- Strength ...
D6A Ultra High-Strength Steel For Military Applications
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D6A Ultra High-Strength Steel For Military Applications Our D6A ultra high-strength steel is a high-quality clean, air-melted steel that we melt in an electric arc furnace, vacuum degas and refine to meet critical customer requirements. We create tailored steel products and services for demanding military applications, helping you meet your material performance needs to complete the required mission. You can heat-treat D6A to ultimate tensile strengths as high as 280 KSI with a high yield-to-tensile strength ratio and good ductility. Because of the high hardenability of D6A, you can through-harden it in large section sizes. Customers use D6A in critical military applications where high strength and toughness are essential. We apply our proprietary air-melt steel practices to provide ultra-clean air-melt steels with oxide inclusion contents that rival that of vacuum arc re-melted steels. We conducted laboratory studies of our ultra high-strength D6A steel, and the data from these studies are available on the back page. We austenitized the samples at 1675°F (913°C) for 60 minutes, quenched them in room-temperature oil, and tempered the samples for four hours at temperatures indicated. We have developed our heat-treat practices to achieve these results consistently.
Transcript of D6A Ultra High-Strength Steel For Military Applications
D6A Ultra High-Strength SteelFor Military Applications
Our D6A ultra high-strength steel is a high-quality clean, air-melted steel that we melt in an electric arc furnace, vacuum degas and refine to meet critical customer requirements.
We create tailored steel products and services for demanding military applications, helping you meet your material performance needs to complete the required mission.
You can heat-treat D6A to ultimate tensile strengths as high as 280 KSI with a high yield-to-tensile strength ratio and good ductility. Because of the high hardenability of D6A, you can through-harden it in large section sizes. Customers use D6A in critical military applications where high strength and toughness are essential. We apply our proprietary air-melt steel practices to provide ultra-clean air-melt steels with oxide inclusion contents that rival that of vacuum arc re-melted steels.
We conducted laboratory studies of our ultra high-strength D6A steel, and the data from these studies are available on the back page. We austenitized the samples at 1675°F (913°C) for 60 minutes, quenched them in room-temperature oil, and tempered the samples for four hours at temperatures indicated. We have developed our heat-treat practices to achieve these results consistently.
Table II. Mechanical properties of TimkenSteel ultra high-strength D6A steel for a limited range of tempering.
Tempering Temperature oF [oC]
Yield Strength ksi [MPa]
Ultimate Tensile Strength ksi [MPa]
Elongation %Reduction of Area %
Room Temperature Impact Energy
ft. lbs. [J]
500 [260] 251 [1731] 303 [2086] 8 25 12 [16]
550 [288] 246 [1696] 292 [2013] 8 25 11 [15]
650 [343] 238 [1638] 279 [1920] 11 40 11 [15]
750 [399] 220 [1517] 252 [1738] 11 41 11 [15]
850 [454] 213 [1465] 237 [1634] 12 44 12 [16]
950 [510] 212 [1462] 233 [1607] 14 47 13 [18]
1050 [566] 210 [1448] 229 [1579] 15 51 19 [26]
1150 [621] 196 [1351] 210 [1448] 15 52 22 [30]
1250 [677] 142 [979] 154 [1062] 19 58 51 [69]
1300 [704] 116 [800] 130 [896] 22 62 74 [100]
We’re Up For The Challenge
We customize every product and service we deliver to meet customers’ specific needs. Our focus is on improving performance by addressing the toughest challenges, whether that requires SBQ steel bars or seamless mechanical tubing, value-added steel components, honing, drilling or thermal-treatment services or supply chain solutions.
Our engineers are experts in materials, processing and applications, so we can work closely with each customer to deliver flexible solutions related to our products as well as their applications and supply chains. We believe few others in our industry can consistently deliver this kind of breadth, customization and responsiveness.
For more information, visit www.timkensteel.com or call us at 866.284.6536 (USA), +44 (0) 116 2325186 (Europe),
+52 (55) 5876 9888 (Latin America) and +86 (21) 60231080 (China).
250 09-15 :29 Order No. 0113 TimkenSteel® is a registered trademark. ©2015 TimkenSteel Corporation. Printed in U.S.A.
Table I. Typical chemical composition of TimkenSteel ultra high-strength D6A steel.
C Si Mn Cr Ni Mo V
0.47 0.22 .70 1.05 0.55 1.0 0.12
