Selection Guide The information provided here was gathered from published literatures and other resources. It is intended to be used for informational purpose only. We DID NOT test all the metals listed on this document. Users should make their own investigations to determine the suitability of the information for their particular purposes. ES Laboratory, LLC makes no representations, warranties or conditions of any kind, express or implied. Last updated on 11/17/2015 Iron & Carbon Steels (General) Name General microstructure (unknown grade) Bainite Both ferrite grains and carbides Carbide networks Cold-worked ferrite Ferrite grains and grain boundaries General alloy segregation Grain-boundary of carbides Granular bainite (martensite-austenite constituent) Martensite, as-quenched Martensite, tempered Pearlite First then 2% First then 2% 2% 2% 2% First then 2% 2% or Stainless Steels (General) Name General microstructure (unknown grade) Austenite grains (austenitic stainless steel) Carbides Carbides, sensitized Delta ferrite Ferrite grains (ferritic stainless steel) Martensite structure Sigma phase reagent Electrolytic etching (best) or Marble's (aggressive) reagent reagent Kalling s,, or Kalling s Page 1 of 6
Tool Steels 51100 52100 A2 A6 D2 D3 H11 or H12 H13 H21 H46 L6 M2 M4 M42 M50 M52 O2 T1 T2 W1 Cast Irons Ductile cast iron (Nodular cast iron) Gray cast iron Malleable cast iron White cast iron Wrought iron Page 2 of 6
Stainless Steels and Superalloys 301 302, 302HQ 303 or 303SE Kalling s 2 304 or 309 310 316 Marble s 317 Marble s 321 Marble s 347 403 405 410 416 418 420 422 430, 430F, 430FR Vilella's 431 440A, 440B, 440C Vilella's 135 Mod (Nitralloy 135 Mod) 13-8 PH 15-5 PH 17-22 17-22A 17-4 PH 21-6-9 (21Cr-6Ni-9Mn) 22-13-5 (22Cr-13Ni-5Mn) 300M A182 F51 A286 AerMet (All) Fry's AISI 664 (V-57) Kalling s 2 Alloy 20 (20Cb-3 stainless) Alloy 901 (Nimonic 901, Pyromet 901) Kalling s 2 Alloy 92 Alloy X AM 355 Vilella's Chrome Core 12-FM Kalling s 2 Chrome Core 13-FM Kalling s 2 Chrome Core 13-XP Kalling s 2 Page 3 of 6
Chrome Core 18-FM Kalling s 2 Chromoly Colmonoy CK20 (Cast 310) CRES (corrosion-resistant steel) D6AC Discaloy ER308 FV535 Greek Ascoloy GTD222 Hastelloy X (Pyromet 680) Hastelloy HR-120 HP 9-4-20 HP 9-4-30 Hy-Tuf Incoloy 800 HT Incoloy 903 Incoloy 907 Incoloy 909 Marble s or Incoloy 925 Kalling s 2 Inconel 600 Inconel 706 Kalling s 2 Inconel 713 Inconel 718 Kalling s 2 Inconel 722 Inconel 783 Inconel 901 Inco X750 Invar 36 JBK-75 Jethete Kovar Monel Monel 400 (Nickel Copper 400) Monel K-500 N155 (Alloy N155) N161 NCF 3015 Kalling s 2 Nickel 200/201 Kalling s 2 Nimonic Nimonic C263 Nimonic PE16 Nitralloy Nitronic Page 4 of 6
Pyromet 720 Kalling s 2 Pyromet 860 Kalling s 2 Pyromet V-57 Kalling s 2 Pyrowear 675 T321 stainless Thermo-Span or Kalling s 2 TrimRite Trinamet stainless UDIMET 720 (U720) Waspaloy Page 5 of 6
Aluminum Alloys 206 Keller's 224 Keller's 308 Keller's 356 Keller's 357 Keller's 384 Keller's 390 Keller's 413 Keller's 520 Keller's 1100 Keller's 2219 Keller's 2618 Keller's 3003 Keller's 6061 T6 Keller's 7075 Keller's 2024 T6 Keller's Cast aluminum (most) Keller's Titanium Alloys Titanium alloys (Unknown grade) Beta C CP Ti (Commercially pure titanium, Grade 1-4) Ti 15-3 Ti 21S (Beta 21S) Ti 3-2.5 (Ti 3Al-2.5V, Grade 9) Ti 5-2.5 (Ti 5Al-2.5Sn, Grade 6) Ti 6-2-4-2 (Ti 6Al-2Sn-4Zr-2Mo) Ti 6-4 (Ti 6Al-4V, Grade 5) Ti 6-6-2 (Ti 6Al-6V-2Sn) Alpha case detection First then 2% HF Page 6 of 6