SAE AISI 4140 Steel Round Bar / Alloy 4140 Steel Rod Diameter 10 -
350mm
Products Specification
| Products Name | SAE4140 Alloy Steel Round Bar |
| Diameter | 10 - 300mm |
| Length | 6m or custom cutting any length as request |
| Type | Hot Rolled |
| Brand | BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc |
| MOQ | 1 Ton |
| Loading Port | Shanghai Port |
| Packing | packing by steel wire rope |
| Deliver time | 5 - 7 days for stock materials |
| Other Grade | Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo,304,3 16,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,5CrMnMo |
| Standard | ASTM GB EN DIN |
| Application | Structure and Industrial |
Regular Standard Size of our Round Bar in Stock
| Standard Diameter | 10 12 15 18 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105
110 120 130 140 150 160 180 200 210 220 230 250 270 300 |
About 4140 Alloy Steel
SAE 4140 (AISI 4140 steel) is a Cr-Mo series (Chrome molybdenum
series) low alloy steel, the material has high strength and
hardenability, good toughness, small deformation during quenching,
high creep strength and long-lasting strength at high temperature.
Application of 4140 Alloy Steel
AISI SAE 4140 alloy steel can be made into round steel bar, flat &
square steel bar, steel plate, steel tube, and has many uses in the
aerospace, oil and gas and automotive industries, typical uses are
thin-walled pressure vessels, forged gears and shafts (Motor
shafts, pump shafts, hydraulic shafts, etc.), spindles (lathe
spindles, milling spindles, etc.), collars, clamps, high strength
bolts, valve bonnet, screws, nuts, worms, collets, torsion bars and
various carburized parts.
AISI SAE 4140 Chemical Composition
The table below lists AISI 4140 chemical composition.
| AISI SAE 4140 Chemical Composition (%) |
| Steel (UNS) | C | Si | Mn | P (≤) | S (≤) | Cr | Mo | Ni |
| 4140 (G41400) | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | 0.035 | 0.040 | 0.80-1.10 | 0.15-0.25 | – |
AISI 4140 Steel Mechanical Properties
Material 4140 mechanical properties are given in the table below.
| Steel | Tensile strength, Mpa (ksi) | Yield strength, Mpa (ksi) | Elongation in 50 mm (2 in), % | Reduction in area, % | Hardness (HB) | Sample diameter |
| AISI 4140 | 1020 (148) | 655 (95) | 17.7 | 46.8 | 302 | 25.4mm (1 in.) |
| 655 (95) | 414 (60) | 25.7 | 56.9 | 197 |
| 1075 (156) | 986 (143) | 15.5 | 56.9 | 311 |
Equivalent Material
AISI 4140 equivalent material is listed in the table below.
