Main product:

*** Brass : C3601 -- C3602 -- C3604 , etc. *** Aluminium Alloy : A2011 -- A2017 -- A5052 -- A5056 -- A6061 -- A7075 , etc. *** Stainless steel : SUS303 -- SUS304 -- SUS316 -- SUS416 -- SUS420 -- SUS430 --, etc. *** Steel : ** Free cutting steel : SUM22L -- SUM23 -- SUM24L -- SUM43 , etc. ** Alloy Steel : SCM415 -- SCM420 -- SCM435 -- SCM440 , etc. ** Carbon Steel : S10C -- S15C -- S20C -- S35C -- S45C -- S48C -- S50C --, etc. ** Other Grades: SS400 -- SGD400D -- SW -- SWRCH -- SUP -- SUJ , etc.

SCM440

SCM440 & SCM440H : Thép hợp kim

 


* Standard            
              : JIS G4105-1979
SCM440

*  Equivalent Grades:                : GB 42CrMoA, JIS SCM440, ASTM 4140, 4142, DIN 42CrMo4, 42CrMoS4. 

 

 SCM440 is medium carbon chromium molybdenum alloy steel, which is an alloy steel containing chromium and molybdenum. It has the advantages of stable composition, low harmful elements, high steel purity, small decarburization layer and few surface defects. It is easy to be spheroidized and has low cold cracking rate. It is usually hardened and tempered. The ultimate tensile strength is 850-1000 Mpa. This material achieves a very good balance between strength, toughness and wear resistance. The chromium content of the alloy provides good hardness permeability, and the molybdenum element imparts average hardness and high strength.

 

SCM440 reacts well in heat treatment and it is easy to process under heat treatment conditions. This material provides many desirable properties such as good strength and wear resistance, excellent toughness, good ductility and resistance to high-temperature stresses.

 

This material is widely used in the production of high-strength steel fasteners, such as engines, molds, motors, gears, transmission parts, shafts, gears, arms, cold forged parts, screws and other products.

 

* Shapes                         : Round, Hexagon, Flat, Square, Profile.

* Surface Finish            : Cold drawn, Hot rolled, Bright, Polished, Centerless Grinding (CG), Chamfered.

 

 Available size range  :

 

Bar

ØRound bars       

Cold drawn : 2mm ~ 55mm

Hot Rlooed  : 32mm ~ 90mm

ØSquare bars              : 3mm ~ 45mm

ØFlat Bar                      : 3mm ~ 65mm

ØHexagonal bars       : 3mm ~ 50mm

·  Available Length 2meter ~ 5.8 meter

  

* Chemical Composition : 

SCM440

Chemical SCM1

 

SCM440H

SCM415H chemical1

* Mechanical properties

Tensile strength (kgf/mm²): 100

Yield strength (kgf/mm²): 85

Elongation (%): 12

Cross section reduction rate (%): 45

Impact value (J/cm2): 6

 

 

* Conditions of heat treatment

 

Annealing: 830 Furnace Cooling

 

Normalization: 830~880 Air Cooling

 

Hardening: 830~880 Oil Cooling

 

Tempering: 530~630 Rapid Cooling

 

 

* Criterion for heat treating conditions revise:

 

Ac: 750~790

 

Ar: 740~690

 

Ms: 310

 

 

Contact

Office:
+84 28 38 32 98 00
tanviet@tanvietmetal.com
Warehouse:
+84 28 38 91 25 99
tanviet@tanvietmetal.com

TAN VIET METAL TRADING CO., LTD