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sae 4140 alloy steel bar equivalent spec
Our company is a manufacturer of sae 4140 alloy steel bar including sae 4140 alloy steel round bar, sae 4140 alloy steel square bar, sae 4140 alloy steel flat bar, sae 4140 square alloy steel bar and sae 4140 hexagonal alloy steel bar.
What is 4140 steel? 4140 steel is a Chromium-Molybdenum through-hardening steel of medium hardenability. It is a general purpose high-tensile steel with medium strength level and good impact properties. Similar to sae 1045 steel grade and sae 5140 steel grade, the y are all medium carbon steel.
The difference between sae 1045 steel material and sae 4140 steel material: sae 4140 steel has alloy element, it is kind of alloy steel bar. After heat treatment, sae 4140 steel material can get between mechanical properties.
Sae 5140 vs sae 4140: sae 4140 steel grade has better hardenability than sae 5140 steel material. After quenching and tempering, sae 4140 can be whole pre hardened from core to side.
What is 4140 steel used for? 4140 steel bar is mainly used to produce high strength stud bolt, threaded rods, wind power bolt, pre-stressed anchor bolts, post stressed anchor bolt, steel tie rod, tie bar, tension rod, tension bar etc. Shaft, axle shaft, crankshaft, shaft for sleeve, linear shaft, pump shaft, rotor shaft, sensor shaft, spline shaft, drive shaft, mandrel shaft, transmission shaft, screw rod etc. CNC machines, precision CNC machines etc. Ejector pins and Ejector rods.
4140 steel spec / 4140 steel specifications:
1. Chemical composition of 4140 steel:
|
Materail |
Chemical Composition % |
||||||
|
ASTM/SAE/AISI |
C |
Si |
Mn |
S |
P |
Cr |
Mo |
|
Aisi 4140 / sae 4140 / astm 4140 |
0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
0.035 max |
0.035 max |
0.80-1.10 |
0.15-0.25 |
2. 4140 steel equivalent steel grade:
|
GB |
ASTM/SAE/AISI |
DIN |
SCM |
AS /NZS1444 |
|
42CrMo |
Aisi 4140 / sae 4140 / astm 4140 |
42CrMo4 / 42CrMoS4 |
SCM440 |
AS 4140 |
3. 4140 steel sizes:
|
4140 steel bar shapes |
4140 steel bar sizes range |
4140 steel bar tolerance |
|
4140 steel round bar |
8mm to 100mm for 4140 cold drawn steel round bar |
h9 h10 h11 -0.05mm/+0mm min |
|
30mm to 100mm for 4140 peeled steel round bar |
h9 h10 h11 -0.02mm/+0mm min |
|
|
100mm to 300mm for 4140 turned steel round bar |
+/-2mm max |
|
|
300mm to 800 for 4140 forged steel round bar |
+/-10mm max |
|
|
4140 steel square bar |
(8*8)mm to (100*100)mm |
h9 h10 h11 -0.05mm/+0mm min |
|
4140 steel flat bar / 4140 steel rectangular bar |
(8*20)mm to (80*100)mm |
+/-0.1mm |
|
4140 steel hex bar / octagon 4140 steel |
16mm to 75mm |
h9 h10 h11 |
4. Weight of 4140 steel:
|
Weight of 4140 steel round bar |
0.00617*D*D*Length |
|
Weight of 4140 square steel bar |
0.00785*D*D*Length |
|
Weight of 4140 hex bar |
0.0068*D*D*Length |
5. 4140 steel microstructure:
4140 steel bar grain size: 5 to 8
4140 steel nonmetal Impurity:
|
A |
B |
C |
D |
||||
|
T |
H |
T |
H |
T |
H |
T |
H |
|
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
6. Processing of 4140 steel:
We are a factory to process all kinds of steel bars on surface, size and microstructure. With complete production and processing facilities, we can supply all kind of pre heat treated 4140 steel bar and pre machining 4140 steel bar as following:
1) Heat treatment of 4140 steel
Oil quenching 4140 steel / 4140 normalizing steel / pre hardened 4140 steel / annealing 4140 steel / stress relieving 4140 steel / 4140 qt steel / flame hardening 4140 steel / 4140 steel induction hardening / case hardening 4140 steel / aisi 4140 oil quenched / austempering 4140 steel / 4140 steel water quenched / nitriding 4140 steel / milling 4140 steel
After heat treatment, 4140 steel bar can get better heat treated 4140 steel properties, for example:
4140 steel quenched and tempered properties:
Yield strength of 4140 steel: 930MPa min
Tensile strength of 4140 steel: 1080MPa min
Elongation of 4140 steel: 12% min
Reduction area of 4140 steel: 50% min
Rockwell hardness of 4140 steel: 32HRC min
Brinell hardness of annealed 4140 steel: 217HB max
Vickers hardness of 4140 steel: We can also guarantee the Vickers hardness based on your special requirements.
2) Machining 4140 steel:
knurling 4140 steel / tapping 4140 steel / grinding 4140 steel / turning 4140 steel / threading 4140 steel / cutting 4140 steel / drilling 4140 steel / forging 4140 steel / laser cutting 4140 steel / reaming 4140 steel / stick welding rod for 4140 steel / bending 4140 steel / brazing 4140 steel / straightening 4140 steel / tg&p 4140 steel / polishing 4140 steel / cold drawing 4140 steel
After the machining, 4140 steel can get precision size, various surface, better roughness, straightness etc. 4140 steel can be used for axe, pins, knives, gun barrels, gears, bolts, washers, hammer, sword etc.
As a Chinese steel bar professional manufacturer and supplier of more than twenty years, with complete produce and processing facilities, advanced testing equipments and big stock of steel bar, we can supply 4140 steel bar with good quality, competitive price, short delivery time and personalized customization. We welcome old and new customers to inquire to us for technical questions and demands.
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Main Product:
Cold Drawn Steel Bar,
Bright Steel Bar,
Heat Treated Steel Bar and Tube,
Threaded Rods,
High Strength Steel Tie Rod ,
High Strength Steel Bolts
