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Basic Info.
Product Description
Alloy steel 42CrMo/4140/42CrMo4/SCM440
Ningshing Precision Machinery began in 1992. We devote oneself to providing One-Stop Solutions to our customers on Tool Steel, Die Steel, Alloy Steel, Mold Base, Machining Parts, CNC Machine.
Product Description
AISI/SAE 4140 Alloy Steel is a versatile alloy with good atmospheric corrosion resistance and reasonable strength. It shows good overall combinations of strength, toughness, wear resistance and fatigue strength.
Dimensions
Hot Rolled Round: dia.16-300 mm
Forged Round: dia.150-1200 mm
Cold Drawn Round: dia.6-30 mm
Hot Rolled Plate: 10-150 x 2000-2300 mm
Forged Block: 150-1000 x 200-1900 mm
Delivery Condition
EAF+LF+VD, Hot Rolled or Forged or Cold Drawn, Annealed or Q+T, Black surface or Machined surface, UT SEP1921 Class3 C/c or D/d
Equivalence
| AISI / SAE | DIN / W.Nr | JIS | GB |
| 4140 | 42CrMo4 / 42CrMoS4 / 1.7225 | SCM440 | 42CrMo |
| Other designations equivalent to AISI 4140 alloy steel are listed in the following table. | |||
| AMS 6349 | ASTM A193 (B7, B7M) | ASTM A506 (4140) | ASTM A752 (4140) |
| AMS 6381 | ASTM A194 (7, 7M) | ASTM A513 | ASTM A829 |
| AMS 6382 | ASTM A29 (4140) | ASTM A513 (4140) | SAE J1397 (4140) |
| AMS 6390 | ASTM A320 (L7, L7M, L7D) | ASTM A519 (4140) | SAE J404 (4140) |
| AMS 6395 | ASTM A322 (4140) | ASTM A646 (4140) | SAE J412 (4140) |
| AMS 6529 | ASTM A331 (4140) | ASTM A711 | |
Chemical Composition (%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo |
| 42CrMo4 | 0.38-0.45 | ≤ 0.40 | 0.60-0.90 | ≤ 0.035 | ≤ 0.035 | 0.90-1.20 | 0.15-0.30 |
| 1.7225 | |||||||
| 42CrMoS4 | 0.38-0.45 | ≤ 0.40 | 0.60-0.90 | ≤ 0.035 | 0.020-0.040 | 0.90-1.20 | 0.15-0.30 |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤ 0.035 | ≤ 0.040 | 0.80-1.10 | 0.15-0.25 |
| SCM440 | 0.38-0.43 | 0.15-0.35 | 0.60-0.85 | ≤ 0.035 | ≤ 0.040 | 0.90-1.20 | 0.15-0.30 |
| 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | ≤ 0.035 | ≤ 0.035 | 0.90-1.20 | 0.15-0.25 |
Applications
AISI 4140 Alloy Steel is used for as wide variety of applications where greater toughness and wear resistance is needed over lower carbon grades. Typical applications for 4140 tool steel uses include Components, Adapters, Arbors,strippers, holder blocks, mold bases, ejectors, back up and support tooling, fixtures, jigs, molds, cams, drill collars, Axle Shafts, Bolts, Crankshafts,stubs, couplings, reamer bodies, axles, shafting, piston rods, rams, hydraulic machinery shafts, gears, sprockets, gear racks, chain links, spindles, tool bodies, tool holders, tie rods, Connection Rods, Chuck Bodies, Collets, Conveyor Pins & Rolls, Ejector Pins, Forks, Gears, Guide Rods, Hydraulic Shafts & Parts, Lathe Spindles, Logging Parts, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pinions, Pump Shafts,boring bars,tracks, slides, wear strips or parts, forming dies, brake dies, trim dies, bolsters, machinery parts and components, etc.
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| Die Casting Die | Mold Base | Aluminum Die |
