High quality cast steel shot with high wear resistance

Short Description:

Junda Steel Shot is manufactured by melting selected scrap in electric induction furnace. The chemical composition of molten metal is analyzed and strictly controlled by spectrometer to obtain SAE Standard specification. The molten metal is atomized and transformed into round particle and subsequently quenched and tempered in a heat treating process to obtain a product of uniform hardness and microstructure, screened by size according to SAE Standard specification.

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Junda industrial steel shot is divided into four, a national standard cast steel shot, containing chromium cast steel shot, pills for low carbon steel, stainless steel, including national standard cast steel shot is completely in accordance with the national standard requirements of element content in production, and the element of chromium cast steel shot, is based on national standard of steel balls, adding ferromanganese ferrochrome smelting process in production elements, such as Owen live longer; Low carbon steel shot production process and national standard steel shot, but the raw material is low carbon steel, carbon content is lower; Stainless steel shot is produced by atomizing forming process, raw materials are stainless steel, 304, 430 stainless steel and so on.

This type of shot is made for use in shot blasting and blasting processes under pressure by compressed air. It is basically used on non-ferrous metals such as aluminium, zinc alloys, stainless steels, bronze, brass, copper...
With its wide range of gradings, it is used for cleaning, deburring, compaction, shot peening and general finishing processes, on all kinds of parts, without contaminating its surface by ferrous dusts which deteriorate and change the colour of the treated metals. for the aging process of marble and granite.

Industrial application

Steel shot blasting
Steel shot cleaning the casting sand and burnt -on sand of the casting to make the surface get good cleanliness and required roughness, so that can be benefit to the subsequent processing and coating.

Cast steel shot for Steel plate surface preparation
Cast steel shot cleaning the oxide skin, rust and other impurity by shot Blasting, then using the vacuum cleaner or the purified compressed air to clean up the steel products surface.

Steel shots used for Engineering machinery
Steel shots used for Machinery cleaning can effectively remove the rust, welding slag, and oxide skin, eliminate the welding stress,and increase basic binding force between rust removing coating and the metal ,thus greatly enhancing the derust quality of engineering machinery spare part.

Steel shot size for Stainless steel plate cleaning
In order to achieve clean, luminous, exquisite burnish surface treatment of stainless steel plate, it must select the suitable abrasive materials to remove the scale from cold rolled stainless steel surface.
According to different grades,the stainless steel surface needs to select different diameter abrasives and proportion to process. Compared to the traditional chemical process, it could lower the cleaning cost and achieve green production.

Steel shot blast media for Pipeline anti-corrosion
The steel pipes need surface treatment in order to strengthen the corrosion resistance. By steel shot, blasting media polishes, cleans and removes the oxide and the attachments achieve the requested rust removing grade and the grain depth, not only cleaning surface but also satisfying the adhesion between steel pipe and coating,achieve good anti-corrosion effect

Steel shot peening strengthening
The metal parts operated in cyclic loading condition and subjected to the action of cycling stress need shot peening strengthening process to improve the fatigue life.

Cast steel shot Application domains
steel shots peening is mainly used in strengthening processing of crucial parts such as helical spring ,leaf spring, twisted bar,gear, transmission parts, bearing ,cam shaft, bent axle , connecting rod and so on. When the airplane landing, the landing gear must withstand the formidable impact that it needs shot peening treatment regularly. The wings also require the periodic stress release treatment.

Technical Parameters

Project		National Standards	Quality
Chemical composition%	C	0.85-1.20	0.85-1.0
	Si	0.40-1.20	0.70-1.0
	Mn	0.60-1.20	0.75-1.0
	S	<0.05	<0.030
	P	<0.05	<0.030
Hardness	steel shot	HRC40-50 HRC55-62	HRC44-48 HRC58-62
Density	steel shot	≥7.20 g/cm3	7.4g/cm3
Microstructure		Tempered Martensite or Troostite	Tempered Martensite Bainite Composite organization
Appearance		Spherical Hollow particles<10% Crack particle<15%	Spherical Hollow particles<5% Crack particle<10%
Type		S70, S110, S170, S230, S280, S330, S390, S460, S550, S660, S780
Packing		Each ton in a separate Pallet and each ton divided in 25KG packs.
Durability		2500~2800 times
Density		7.4g/cm3
Diameter		0.2mm, 0.3mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.7mm, 2.0mm, 2.5mm
Applications		1. Blast cleaning: Used for blast cleaning of casting, die-casting, forging; sand removal of casting, steel plate, H type steel, steel structure. 2. Rust removal: Rust removal of casting, forging, steel plate, H type steel, steel structure. 3. Shot peening: Shot peening of gear, heat treated parts. 4. Shot blasting: Shot blasting of profile steel, ship board, steel board, steel material,steel structure. 5. Pre-treatment: Pre-treatment of surface, steel board, profile steel, steel structure, before painting or coating.

Size Distribution Of Steel Shot

SAE J444 Standard Steel shot												Screen No.	In	Screen size
S930	S780	S660	S550	S460	S390	S330	S280	S230	S170	S110	S70	Screen No.	In	Screen size
ALL pass												6	0.132	3.35
	All Pass											7	0.111	2.8
90% min		All Pass										8	0.0937	2.36
97%min	85%min		All Pass	All Pass								10	0.0787	2
	97%min	85%min		5% max	All Pass							12	0.0661	1.7
		97%min	85%min		5% max	All Pass						14	0.0555	1.4
			97%min	85%min		5% max	All Pass					16	0.0469	1.18
				96%min	85%min		5% max	All Pass				18	0.0394	1
					96%min	85%min		10% max	All Pass			20	0.0331	0.85
						96%min	85%min		10% max			25	0.028	0.71
							96%min	85%min		All Pass		30	0.023	0.6
								97%min		10% max		35	0.0197	0.5
									85%min		All Pass	40	0.0165	0.425
									97%min		10% max	45	0.0138	0.355
										85%min		50	0.0117	0.3
										90%min	85%min	80	0.007	0.18
											90%min	120	0.0049	0.125
												200	0.0029	0.075
2.8	2.5	2	1.7	1.4	1.2	1	0.8	0.6	0.4	0.3	0.2	GB