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scm 420 grade chemical composition
scm 420 grade chemical composition
scm 420 grade chemical composition

scm 420 grade chemical composition

$800-1100 /Metric Ton

Min. Order:5 Metric Ton
Packaging & Delivery
Selling Units : Metric Ton
Product Description

scm420 steel round bar


SCM420 steel grade is one kind of low carbon Chromium Molybdenum steel material which is usually used to produce SCM420 steel joint, SCM420 steel nut, SCM420 steel screws, SCM420 steel shaft, steel stud, SCM420 steel flanges and valves etc. SCM420 steel material is in US standard as SCM420, SCM420 and SCM420. SCM420 steel grade equivalent materials includes aisi 4120, sae 4120, astm 4120, 18CrMo4, 20CrMo etc.  Except SCM420 steel material, there is also SCM420h steel material. The difference of SCM420 steel and SCM420h steel is that SCM420h 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 SCM420 alloy steel bar including SCM420 Alloy Steel Round Bar, SCM420 Alloy Steel Square Bar, SCM420 alloy steel flat bar, SCM420 alloy Square Steel Bar and SCM420 alloy Hexagonal Steel Bar.

SCM420 steel spec / SCM420 steel specifications:

1.      Chemical composition of SCM420 steel:

Material

Chemical Composition %

JIS

C

Si

Mn

S

P

Cr

Mo

SCM420

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.      SCM420 steel equivalent steel grade:

GB 

ASTM/SAE/AISI 

DIN 

SCM

AS /NZS1444

20CrMo

Aisi 4120 / sae 4120 / astm 4120

18CrMo4

SCM420

AS 4120

3.      SCM420 steel sizes:

SCM420 steel bar shapes

SCM420 steel bar sizes range

SCM420 steel bar tolerance

SCM420 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

SCM420 Steel Square Bar

(8*8)mm to (100*100)mm

h9 h10 h11

-0.05mm/+0mm min

SCM420 steel flat bar / SCM420 steel rectangular bar

(8*20)mm to (80*100)mm

+/-0.1mm

SCM420 steel hex bar / octagon SCM420 steel

16mm to 75mm

h9 h10 h11

4.      Weight of SCM420 steel:

Weight of SCM420 steel round bar

0.00617*D*D*Length

Weight of SCM420 square steel bar

0.00785*D*D*Length

Weight of SCM420 hex bar

0.0068*D*D*Length

5.      SCM420 steel microstructure:

SCM420 steel bar grain size: 5 to 8

SCM420 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 SCM420 steel bar and pre machining SCM420 steel bar as following:

1)      Heat treatment of SCM420 steel

Oil quenching SCM420 steel / SCM420 normalizing steel / pre hardened SCM420 steel / annealing SCM420 steel / stress relieving SCM420 steel / SCM420 qt steel / flame hardening SCM420 steel / SCM420 steel induction hardening / case hardening SCM420 steel / aisi SCM420 oil quenched / austempering SCM420 steel / SCM420 steel water quenched / nitriding SCM420 steel /  milling SCM420 steel

After heat treatment, SCM420 steel bar can get better heat treated SCM420 steel properties, for example:

SCM420 steel quenched and tempered properties:

Yield strength of SCM420 steel: 685MPa min

Tensile strength of SCM420 steel: 885MPa min

Elongation of SCM420 steel: 12% min

Reduction area of SCM420 steel: 50% min

Rockwell hardness of SCM420 steel: 32HRC max

Brinell hardness of annealed SCM420 steel: 197HB max

Vickers hardness of SCM420 steel hv: We can also guarantee the Vickers hardness based on your special requirements.

2)      Machining SCM420 steel:

knurling SCM420 steel / tapping SCM420 steel / grinding SCM420 steel / turning SCM420 steel / threading SCM420 steel / cutting SCM420 steel / drilling SCM420 steel / forging SCM420 steel / laser cutting SCM420 steel / reaming SCM420 steel / stick welding rod for SCM420 steel /  bending SCM420 steel / brazing SCM420 steel / straightening SCM420 steel / tg&p SCM420 steel / polishing SCM420 steel / cold drawing SCM420 steel

     After the machining, SCM420 steel can get precision size, various surface, better roughness, straightness etc. SCM420 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 SCM420 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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