4120 steel round bar properties
$800-1100 /Metric Ton
Min. Order: | 5 Metric Ton |
Selling Units | : | Metric Ton |
aisi 4120 steel round bar
4120 steel grade is one kind of low carbon Chromium Molybdenum steel material which is usually used to produce 4120 steel joint, 4120 steel nut, 4120 steel screws, 4120 steel shaft, steel stud, 4120 steel flanges and valves etc. 4120 steel material is in US standard as aisi 4120, sae 4120 and astm 4120. 4120 steel grade equivalent materials includes scm420, 18CrMo4, 20CrMo etc. Except 4120 steel material, there is also 4120h steel material. The difference of 4120 steel and 4120h steel is that 4120h steel is one kind of gear steel which is popular to be used to produce gears and shafts in cars, motors and parts needed strength and cutting features.
Our company is a manufacturer of 4120 alloy steel bar including 4120 Alloy Steel Round Bar, 4120 Alloy Steel Square Bar, 4120 alloy steel flat bar, 4120 alloy Square Steel Bar and 4120 alloy Hexagonal Steel Bar.
4120 steel spec / 4120 steel specifications:
1. Chemical composition of 4120 steel:
Material | Chemical Composition % | ||||||
ASTM/SAE/AISI | C | Si | Mn | S | P | Cr | Mo |
Aisi 4120 / sae 4120 / astm 4120 | 0.17-0.24 | 0.17-0.37 | 0.40-0.70 | 0.035 max | 0.035 max | 0.80-1.10 | 0.15-0.25 |
2. 4120 steel equivalent steel grade:
GB | ASTM/SAE/AISI | DIN | SCM | AS /NZS1444 |
20CrMo | Aisi 4120 / sae 4120 / astm 4120 | 18CrMo4 | SCM420 | AS 4120 |
3. 4120 steel sizes:
4120 steel bar shapes | 4120 steel bar sizes range | 4120 steel bar tolerance |
4120 steel round bar | 8mm to 100mm for 4135 Cold Drawn Steel Round Bar | h9 h10 h11 -0.05mm/+0mm min |
30mm to 100mm for 4135 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 | |
4120 Steel Square Bar | (8*8)mm to (100*100)mm | h9 h10 h11 -0.05mm/+0mm min |
4120 steel flat bar / 4120 steel rectangular bar | (8*20)mm to (80*100)mm | +/-0.1mm |
4120 steel hex bar / octagon 4120 steel | 16mm to 75mm | h9 h10 h11 |
4. Weight of 4120 steel:
Weight of 4120 steel round bar | 0.00617*D*D*Length |
Weight of 4120 square steel bar | 0.00785*D*D*Length |
Weight of 4120 hex bar | 0.0068*D*D*Length |
5. 4120 steel microstructure:
4120 steel bar grain size: 5 to 8
4120 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 4120 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 4135 steel bar and pre machining 4120 steel bar as following:
1) Heat treatment of 4120 steel
Oil quenching 4120 steel / 4120 normalizing steel / pre hardened 4120 steel / annealing 4120 steel / stress relieving 4120 steel / 4120 qt steel / flame hardening 4120 steel / 4120 steel induction hardening / case hardening 4120 steel / aisi 4120 oil quenched / austempering 4120 steel / 4120 steel water quenched / nitriding 4120 steel / milling 4120 steel
After heat treatment, 4120 steel bar can get better heat treated 4120 steel properties, for example:
4120 steel quenched and tempered properties:
Yield strength of 4120 steel: 685MPa min
Tensile strength of 4120 steel: 885MPa min
Elongation of 4120 steel: 12% min
Reduction area of 4120 steel: 50% min
Rockwell hardness of 4120 steel: 32HRC max
Brinell hardness of annealed 4120 steel: 197HB max
Vickers hardness of 4120 steel hv: We can also guarantee the Vickers hardness based on your special requirements.
2) Machining 4120 steel:
knurling 4120 steel / tapping 4120 steel / grinding 4120 steel / turning 4120 steel / threading 4120 steel / cutting 4120 steel / drilling 4120 steel / forging 4120 steel / laser cutting 4120 steel / reaming 4120 steel / stick welding rod for 4120 steel / bending 4120 steel / brazing 4120 steel / straightening 4120 steel / tg&p 4120 steel / polishing 4120 steel / cold drawing 4120 steel
After the machining, 4120 steel can get precision size, various surface, better roughness, straightness etc. 4120 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 4120 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.
Shandong Le Ren Special Steel CO., Ltd. owns three factories to produce all kinds of steel rod, steel bar and finished steel products. Among three factories, one is to produce steel bars such as annealed, normalized and quenched and tempered steel bar and pipe, cold drawn, peeled, ground and polished steel bar etc; one is to produce threaded or knurled steel rod and steel bar; another one is to do steel bar, steel rods or steel pipe machining.
In the tactories, we have complete and advanced production, inspection and testing facilities such as shot blasting machines, cold drawing machines,straightening machines, annealing furnace, quenching and tempering furnaces, threading machines, cnc machines, welding machines etc, and inspections and testing facilities to inspect dimension tolernaces, corner radius, length, straightness, surface roughness, mechanical properties, AKV, UT testing, Eddy testing and MPI testing etc. All of these, including more than twenty years production and exporting experiences, we can supply you good quality products and services.
Our factory is equipped with complete inspection and testing facilities to inspect steel bar dimension tolernaces, corner radius, length, straightness, surface roughness, mechanical properties, AKV, UT testing, Eddy testing and MPI testing etc.
Most of our steel bar are cold drawn, peeled, ground and polished steel bar which require good surface and straightness. So steel bar packing is very important to keep good quality. We use several kinds of steel bar packing according to your technical requirements.
Our hot selling steel products include annealed steel bar, quenched and tempered steel bar, cold drawn steel bar, peeled, ground and polished steel bar, cold drawn hexagonal steel bar, steel threaded rods and knurled steel bar, heat treated steel pipe, olympic barbell bar etc.
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
Fill in more information so that we can get in touch with you faster
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.