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[edit]
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 | - |
SVCM[edit]
SVCM steel is 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[edit]
- ^ a b c d e f g Isakov, Edmund (2007), Cutting Data for Turning of Steel, Industrial Press Inc., Chapter 1 § 1.5.2 Shock-resisting tool steels. pp.82-84
- ^ Materials Selection for the Minerals Industry, Metallurgical Society of AIME, 1977, p. 69
- ^ a b c d e f "Tool Steels - Shock-Resisting Tool Steels", www.azom.com
- ^ Davis, Joseph R., ed. (1995), ASM Specialty Handbook: Tool Materials, p.123, Table 2.
- ^ "What Our Tools Are Made Out of". Olsa Tools.
- ^ a b "Screwdrivers | Hand Tools | Draper Tools". www.drapertools.com.
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
- ^ "Common materials for hand tools:Carbon steel & Chromium-vanadium steel". August 14, 2018.