Forged Round Bar Scm440, 42CrMo, 1.7225, 4140/4142alloy Hot Rolled Round Steel

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Forged
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Polished
• Alloy: Alloy
• Model NO.: 42crmo, SCM440, 4140, 4142
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Transport Package: Wood Brick/ Wirerope
• Specification: Dia 10~800*5000~8000mm
• Trademark: HK JIMI
• Origin: Guangdong, China (Mainland)
• HS Code: 72283024
• Production Capacity: 5000 Tons/Month

Product Description

High Quality Alloy steel SCM440/4140,/1.7225/42CrMo4/  structural 42Crmo Forged Hot  round bar 

Specification(Customer requsted size):
Dia: 10~800MM
Length: 3000~8000MM
Hot rolled, Forging, Black, Hardened, Tempering, Hardness: 28~34HRC Or Annealing 

Material Character:
Good mechanical property and quenching, make surface have equal hardness after deal with it. Nice polishing and low roughness.
Normally make the heat-treatment to harden condition before used, it can be used directly after the mould machined.

Application:
Used for various large-size mirror plastic mould, precision plastic mould, like: cars accessies, home appliances, electronic equipment
plastic mould. 
Good machinability and morror grinding performance,Surtable for making plastic mold and die casting low melting point metal mold materials.

1.Internatioal Standard

DIN	ASIA	JIS	CHINA
			P20+S

2.Chermical Compisition(Wt%) 

1.2738	C	Si	Mn	Cr	Mo	S	P	V
	1.90-2.20	0.10-0.60	0.20-0.60	11.0-13.50	1.80-2.20	≤0.003	≤0.003	0.20-0.50

3.Available Size(mm) :

Flat Bar Size				Round Bar Size(mm)
Thickness	Width	Length		Diameter		Length
6-400		100-1500	2000-5800	6-400		9000

4.Product Process:
Electric-Furnace Smelting(EF)→Ladle Furnace(LF)→Vacuum Degassing(VD)→ Argon protected ingot →Multidirectional Forging →
(Concave forging →)Normalizing+Hydrogen Diffusion Annealing → Ultrasonic Flaw Detection →Queching+Tempering Prehardened
Heat Treatment:

Quenching					Tempering			Annealing
Heating temperature/ºC			Cooling way	Hardness	Tempering temperature /ºC	Tempering number	Hardness (HRC)	Delivery hardness (HB)
First preheating	Second preheating	last preheating			170-230	2	61-63	235
500-600	820-860	1010-1060	Oil Cooling	60-68

Cope of Application:

Exterior decoration of buildings: Roof and wallboards of industrial, commercial, residential and public facilities,Interior decoration of buildings:
Wallboards, ceiling boards, partition boards, fireproof doors,Building accessories: Window panels, signboardsHome appliances: Oil/gas boilers,
rice buckets, portable gas burners, etc.


Product Feature
uniform hardness across the cross-section -very good polishability-good machinability-hardenable and temperable plastic mould steel-nitridable-suitable
for chrome plating 
APPLICATIONS:
Suitable for large thickness greater than 400 mm, in particular, require uniform hardness and high toughness and plastic mold polishing on the surface
of good performance, such as TV chassis, copy chassis, bumper, shock absorber, the instrument panel and other large mold
GENERAL:
-uniform hardness across the cross-section-very good polishability-good machinability-hardenable and temperable plastic mould steel-nitridable-suitable
for chrome plating 



6. About us :

HK JIMI STEEL  Was established in 2012, located in the Shunde District of Guangdong Province, It is an import and export trading
company mainly engaged in advanced special steel, die steel, alloy steel, and steel processing general machinery and equipment.
The company adheres to the concept of "high quality, high requirements and good faith", 
Cooperating with more than 20 famous steel mills in China, rich in spot stock of products. 

Our company has a variety of processing equipment and all kinds of inspection and testing equipment, such as horizontal sawing machine,
vertical sawing machine, milling machine, bilateral milling machine, precision milling machine, plane grinder and so on. The products
with short producing time, excellent quality and high precision can provide a high-quality product choice for the vast number of customers
at home and abroad. 

Our customer group spread all over the domestic provinces and cities, abroad including Europe, the United States, Australia, the Middle
East, Southeast Asia and other more than 20 countries and regions, along with over 100 long-term stable cooperation customers...Choosing Xingxiong will bring you a better experience. 


PLASTIC MOULD STEEL: 1.2311, 1.2312, 1.2738, P20, 1.2083, 1.2316, NAK80, P40, 1.2738HH

HOT WORK MOULD STEEL: 1.2344, SKD61, H13, H11, FDAC, 8407

COLD WORL MOULD STEEL: SKD11, D3, SKS3, 1.2080, 1.2379, CR12MOV, O1, D2

STRUCTURAL ALLOY STEEL: 4140, 20CR, 40Cr, 35CrMo, 42CrMo, 38CrmoAi, SCM440, SCM420, 1.7225

CARBON STEEL &: Q235, Gcr15, S45C, S50C, S55C

CNC surface grinding machine, NC side boring machine, Band saw, CNC double head machine, Vertical Band saw, CNC milling machine, Double alloy saw blade, wireless remote control crane, Magnetic chuck.