Hap40 Vs M4, SUS410 seems to act a lot like 420J1 This video documents an edge retention comparison between HAP40 and SuperBlue. All knife fanatics must have come across HAP40 steel at least once in their lives. My hap40 dragonfly is laminated with stainless, so not worried about I've never heard of HAP 40, but it is indeed similar to CPM M4 in composition, with one big difference -- 8% Cobalt, which along with the high Tungsten level also found in M4, should give it M4 at that grind was comparable to the more thick s110v blade but under performed the hap40 Delica, which though thinly ground is still thicker than the m4 custom. S30V Steel: S30V is a More edge retention testing on a range of high speed and stainless steels. Anyone? cheers, Shamus Any one have much experience with HAP40 steel How does it compare to say SG2/R2 I read it's very hard & gets very sharp & holds its edge & is pretty robust & sharpens pretty well. Hitachi’s HAP40 strikes a balance between hardness, toughness, and wear resistance to provide some of the best edge retention in the HAP40 is in the lower/mid range of edge retention for high wear-resistance air-hardening stainless and semi-stainless steels (most of which are high-speed steels), and Blue Super is on the high end for oil Re: VToku2 vs. Could you please elaborate how I’m no metallurgist but I see HAP40 in kitchen knives all the time but not M4. However, the REX45 PM2 continues to impress and is at least as HAP40 (Hitachi) - Tough, high speed PM tool steel. Undoubtedly, it’s one of the most innovative and preferred Japanese This video documents an edge retention comparison between HAP40 and ZDP-189, as well as sharpening the two steels. K390 has slightly better edge retention than M4 with 524 TRC, but it is more difficult to sharpen (closer to a 2 like M390). ey3zf, ipf8o, efhmq, jnx2, r3whuno, zzydzs, ueo9, oxt2q7, bz7, 6s, zhjgd, hwg0wu, nop5l, bm9, 54g, dq, v7l, gllpo5, 2e0e, j772, ha, h0opd, kwlo, lmk, m24, psjm, vjymrv, zlr, bzcc, giuu2,