Shock-resisting steel

Shock-resisting steels are a class of tool steels designed to resist breakage by shock. Under the AISI classification system there are seven types, labeled S1 to S7.

Overview

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Shock-resisting steels are designed to have high impact resistance (toughness), along with other properties such as strength, hardness. Silicon is a common addition to this class of steels, as it provides tempering resistance and increases toughness.[1]

Applications for shock-resisting steels includes springs, as well as chisels, dies for forging, and punches.[1] S2 steel is also used to make ball bearings for the mining industry.[2] They are also used for screwdrivers and driver bits.[3]

Type C % Si % V % Cr % Mn % Ni % Mo % W %
S1 (UNS T41901)[1][3][a] 0.40–0.55 0.15–1.20 0.15–0.30 1.00–1.80 0.10–0.40 <0.30 <0.50 1.50–3.00
S2 (UNS T41902)[1][3] 0.40–0.55 0.90–1.20 <0.50 — 0.30–0.50 <0.30 0.30–0.60 —
S3[4] 0.50 2.00 — 0.74 — — — 1.00
S4 (UNS T41904)[1] ? ~0.4–0.65 1.75–2.25 0.35 0.35 0.60–0.90 —
S5 (UNS T41905)[1][3] 0.50–0.65 1.75–2.25 <0.35 <0.50 0.60–1.00 — 0.20–1.35 —
S6 (UNS T41906)[3] 0.40–0.50 2.00–2.50 0.20–0.40 1.20–1.50 1.20–1.50 — 0.30–0.50 —
S7 (UNS T41907)[1][3] 0.45–0.55 0.20–1.00 0.20–0.30[b] 3.00–3.50 0.20–0.90 — 1.30–1.80 —
  1. ^ Commonly known as "tungsten chisel steel".
  2. ^ May be omitted.

SVCM

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"SVCM" redirects here. For the medical technique, see Spatial vectorcardiometry.

SVCM steel is a kind of shock-resisting steel.[5] SVCM steel is an alloy of carbon, silicon, chromium, magnesium, nickel, molybdenum and lead.[6] SVCM+ in addition is quenched and tempered achieving a high hardness (HRC 59).[6] SCVM+ has better torsional properties than chromium-vanadium steel (Cr-V).[7]

References

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  1. ^ a b c d e f g Isakov, Edmund (2007). "1.5.2 Shock-resisting tool steels". Cutting Data for Turning of Steel. Industrial Press Inc. pp. 82–84.
  2. ^ Materials Selection for the Minerals Industry: A Short Course. Metallurgical Society of AIME. 1977. p. 69.
  3. ^ a b c d e f "Tool Steels – Shock-Resisting Tool Steels". AMO Materials. Jul 9, 2012.
  4. ^ Davis, Joseph R., ed. (1995). ASM Specialty Handbook: Tool Materials. ASM International. p. 123, Table 2. ISBN 978-0-87170-545-7.
  5. ^ "What Our Tools Are Made Out of". Olsa Tools. 12 March 2021.
  6. ^ a b "Screwdrivers". Draper Tools. Made by blending carbon, silicon, magnesium, nickel, chromium, molybdenum and lead to create a metal featuring a host of qualities including high strength and ductility
  7. ^ "Common materials for hand tools: Carbon steel & Chromium-vanadium steel". Wait. August 14, 2018.
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