Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Frank Krygowski Newsgroups: rec.bicycles.tech Subject: Re: Machine Shop Date: Mon, 3 Mar 2025 20:40:35 -0500 Organization: A noiseless patient Spider Lines: 28 Message-ID: References: <4edkrj13v11bkgfpmgcr58psf6v64j906f@4ax.com> Reply-To: frkrygow@gmail.com MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Tue, 04 Mar 2025 02:40:36 +0100 (CET) Injection-Info: dont-email.me; posting-host="b86ccf08116856650d2eff718ae4e858"; logging-data="1641302"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18irlSa6CGNtaEOQ3j6xocKjDvVESVgzq0=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:cMAA8ehcbRdGLHpvpWHnAbVfdgE= Content-Language: en-US In-Reply-To: Bytes: 2740 On 3/3/2025 6:30 PM, Jeff Liebermann wrote: > > 1095 is a steel alloy that can be used for making steel springs. It > can also be used for making knife blades, where the a springy steel > makes the blade more durable. The major difference is the steel > spring is fairly thin, while the knife blade is much thicker. Same > spring effect, but very different products. OK, to talk some metallurgy: I don't know that 1095 should be described as a "springy" steel, because I don't know what you mean by "springy." It's not a typical metallurgical term. Maybe you mean it has a higher yield stress? That would mean it could deflect more before a permanent deflection. And springs are called on to purposely deflect. 1095 is popular for knife making, but I think it's more because it's not expensive, while still being easy to heat treat in a way to reach a good compromise between hardness (for edge retention) and ductility (for toughness). In general, the higher the hardness of a steel, the higher the yield stress and the lower its toughness. That balance of properties can be well controlled by heat treating. Alloying elements can improve that balance. -- - Frank Krygowski