Scm415 Scm420h Scm435 Scm440 Alloy Steel 4140 Round Bar

• Customization: Available
• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB
• Model NO.: alloy steel bar
• Composition: Ferrous Steel Scrap
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Black or Bright Surface
• Special Use: Cold Heading Steel, Free Cutting Steel
• Application: Structural Steel Bar
• Steel Grade: Alloy Steel Bar
• Steel Shape: Round Bar
• Supply Condition: Hot Rolle/Forged/Cold Drawn+Qt
• Main Grade: 4140 4150 4130 Scm440 Scm435 Scm415
• Transport Package: Seaworthy Packaging
• Specification: dia: 5mm-800mm
• Trademark: dajin
• Origin: China
• Production Capacity: 2000

Product Description

SCM415 SCM420H SCM435 SCM440
Alloy steel 4140,hot rolled heat treated round bar 
AISI 4140 SCM440 42CrMo Cold drawn steel bar steel shafts
READY STOCK,SHIPMENT 7DAYS

1. AISI4140 cold drawn steel bar

CD 4140 / 4142 alloy bar's chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength.  This alloy responds well to heat treatment.  In the annealed condition it machines at 110 sfm.  It also has good wear resistance, toughness, and good ductility in the quenched and tempered condition.  This grade can also be supplied as turned ground and polished for tighter dimensional tolerances for bearing fitting applications.

2.AISI 4140 Cold drawn steel bar Typical applications

Typical applications are highly stressed parts or parts subject to severe wear..

3.AISI 4140 cold drawn steel bar main type and avaliable sizes

Round bars	5mm-130mm
Suqare bar	6*6mm-100*100mm
Flat bars	3mm*20mm-50mm*100mm
Hex bars	6mm-100mm
Bar Finsihe	Peeled, Cold Drawn, TurnedTurned & Polished, Centreless Ground

4.AISI 4140 Cold drawn steel bar size tolerance

h9,h10,h11 or other tolerance according to client's requirement

5.AISI 4140 Cold drawn steel bar chemical composition(%)

Grade	C	Si	Mn	P	S	Cr	Mo
42CrMo4	0.38-0.45	0.17-0.37	0.40-0.70	≤0.035	≤0.035	0.90-1.20	0.15-0.25
1.7225	0.38-0.45	≤0.40	0.60-0.90	≤0.025	≤0.035	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

6.AISI 4140 Alternative grade in different standard

GB	42CrMo
ASTM	4140
JIS	SCM440
DIN	1.7225

7.AISI 4140 Typical Mechanical Properties

Grade:ASTM A29  4140  42CrMo  SCM440
Hardness:217HB  
Tensile  strength:1080(110)MPA  
Yield  strength: 930(95)MPA
elogation:12%  Reduction  of  area:45%   AKV(impact  value):63J

TYPICAL MECHANICAL PROPERTIES FOR ANNEALED

Tensile Strength	723 - 830Mpa
Yield Strength	585 - 450Mpa
Elongation in 2"	15% - 25%
Reduction of area	45% - 55%
Brinelle Hardness	215-235HB

TYPICAL MECHANICAL PROPERTIES FOR QT

Tensile Strength	890
Yield Strength	755
Elongation in 2"	16%
Reduction of area	50%
Brinelle Hardness	269-321

8.Straightness: 1mm/m(max)
9. Steel bar Packing:
*Bars from different heats will not be mixed and dispatched.
*Bars will be bundles and securely metal strapped in 3 min places of the bar length and tagged properly.
*For further processing products such as cold drawn/peeled or heat treated goods, plastics bag wrapped or pallet loading is available according to customer's demands.
10.Delivery time of steel bar:
7-10days of stock,30 days after order confirmed of new material
11.Payment term:TT or LC

12.Free sample:Yes

13.steel bar Inspection: Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,UT test

14.Our cold drawn factory equipments
We adopt advanced production technology and first-class processing equipments, such as heat treatment furnace, straightening machine, centerless grinding machine, polishing machine, as well as lathing and milling machine etc.

15.Our steel bar mill's certificates

ISO901&ISO.TS16949,ISO4001,OHSAS18001
Special Equipment Manufacturing License of P.R.C for pipeline plate,steel plate for boiler&Vessel;
ISO/TS16949 2009 for Manufacturing of Special steel;
Europe CE Mark Certificate;JIS MARK,KS MARK.

With dynamic and passionate professional sales team and technical team,Our company Dajin make great efforts to integrate China's steel resources and dedication to customers the provision of specialized steel products and services.Hope establish a good relationship with clients, growth together.