1.7225 SAE4140 SCM440 Mechanical Mould Die Alloy Tool Steel

• Type: Steel Plate
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy Steel
• Technique: Hot Rolled
• Shape: Plate
• Surface Treatment: Black surface
• Model NO.: 1.7225, SAE4140, SCM440
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar
• Thickness: 12-500mm
• Heat Treatment: Annealing/Q+T
• Technology: Hot Rolled/Forged/Clod Drawn
• Certificate: ISO/Mill Certificate
• Test: SGS/Ut100%/Elements Testing
• Payment: 30% Deposit, Blance by L/C at Sight or T/T
• Delivery Quantity: Include MOQ
• Transport Package: for Customers′ Request
• Specification: thickness: 20-500mm width: >=155mm, length: 5800m
• Trademark: CF STEEL
• Origin: China
• HS Code: 7225401000
• Production Capacity: 1000t/Month

Product Description

1.7225 SAE4140 SCM440 Mechanical Mould Die Alloy Tool Steel

1. Perform Standard: GB/T 3077-1999

2. Chemical composition(%):

C	Si	Mn	Cr	Mo	P	S	Ni
0.38~0.45	0.17~0.37	0.60~0.90	0.90~1.20	0.15-0.25	≤0.018	≤0.030	≤0.012

3. Available Size:

Grade	Size(mm)
SCM440 Plate	Thickness	Width	Length
	20-500	2200	5800
SCM440 Round Bar	Diameter		Length
	16-450		3000-6000

4. Application
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip,oil drill pipe joints and fishing tools,etc.

5. Mechanical Properties:
Tensile strength:σb (MPa):≥1080(110) 
Yield strength:σs (MPa):≥930(95)
Elongation:δ5 (%):≥12
Section shrinkage:ψ (%):≥45
Impact work:Akv (J):≥63
Impact toughness value:αkv (J/cm²):≥78(8)
 
6.Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
Annealing:HBS<=235.

7. Delivery time
For abundant stock, 7-15 days.For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.

8. Features
1.Vacuum degassing refining processing steel purity, suitable for polishing or etch processing plastic mold.
2. In pre-harden state delivery, no need for heat treatment can be directly used for mold processing, shorten the construction.
3. After heat treatment machining and polishing performance is good, the nitriding treatment, can be suitable for chrome plating surface treatment, such as material is the qualitative hardness is uniform (400mm thick), good toughness and good machining performance.
4.Good hardness uniformity and polishing property, good machining properties. 
5.Good integral mechanical performance under high temperatures. 
6.Good heat-resistance and fatigue-resistance.
7. Pre-hardened to HRC30-36 can be directly used for mold processing, shorten the construction period. 

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