4140 Annealed steel bar is a medium carbon, chromium-molybdenum alloy steel that has a high hardenability. This grade is also widely used for forging. 4140 steel also has good fatigue and impact resistance after heat treating. The average hardness for 4140 annealed is 185/200 BHN, but it can be hardened to RC 54.
Typical applications for this grade include drill collars, pins, axles, bolts, and shafts.
Common specifications for this grade:
Shapes and Sizes
Peterson Steel supplies 4140 steel bar in a wide range of sizes. The shapes available for this grade include:
Standard “4140 Grade” Chemical Composition
4140 Heat Treated is a medium carbon, chromium-molybdenum alloy steel. 4140 HT is the most commonly used high tensile steel with endless applications including everything from gears and pumps to various applications in the automotive and construction industry. 4140 HT has a typical hardness of 28/32 HRC. This grade can also be surface hardened to increase wear resistance.
Peterson Steel supplies 4140 HT steel bar in a wide range of sizes (METRIC INCLUDED).The shapes available for this grade include:
8620 is a low nickel – chromium – molybdenum medium hardenability, case hardening (carburizing) steel, generally supplied in the as rolled condition with a maximum Brinell hardness of 280 (RC30). Characterized by good core strength and toughness in small to medium sections with case hardness up to RC62 when carburized, hardened and tempered. 8620 can also be used (un-carburized) as a high tensile steel, which when suitably hardened and tempered can be utilized for various applications requiring good tensile strength and reasonable toughness.
Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons, Pins, Splined Shafts, Ratchets, Sleeves etc…
Peterson Steel supplies 8620 steel bar in a wide range of sizes. The shapes available for this grade include:
Standard “8620 Grade” Chemical Composition
4340 is a medium-carbon nickel-chromium-molybdenum steel alloy with excellent tensile strength, toughness, and fatigue resistance. Since the material usually comes in the annealed condition, additional heat treatments (oil quenching and tempering, or normalizing and tempering) can produce parts with even higher strength and fatigue resistance. 4340 is a wear-resistant material with especially good abrasion resistance, shock- and -impact resistance, and excellent atmospheric corrosion resistance. The alloy also possesses very good ductility, especially in the annealed condition, where it can be easily formed and machined. Applications 4340 finds use in heavy machinery, specifically for the manufacturing of transmission parts, such as heavy-duty shafts, gears, and axles. Requirements Common specifications for this grade:
Shapes and Sizes Peterson Steel supplies 4340 steel bar in a wide range of sizes. The shapes available for this grade include:
Standard “4340 Grade” Chemical Composition
52100 is a high-carbon chromium alloy steel, which, because of its versatility, is used in a variety of mechanical applications. In the annealed condition this steel is comparatively easy to machine, yet very high hardness and abrasion resistance can be developed by heat treatment to make the steel particularly suitable for applications requiring extreme wear resistance. In addition, 52100 alloy steel can be heat treated to high levels of tensile strength and fatigue strength.
Anti-Friction Bearings & Rollers, Slitting Rolls, Spacers and Knives, Seals, Sleeves & Bushings, Tools, Dies & Molds, Engine & Hydraulic Parts.
Peterson Steel supplies 52100 steel bar in a wide range of sizes. The shapes available for this grade include:
Standard “52100 Grade” Chemical Composition