China Factory Customized Alloy Steel GB/T 20Mn2 Precision Casting for Mechanical Spare Parts

• Customization: Available
• Casting Method: Thermal Gravity Casting
• Process: Investment Casting
• Model NO.: Investment Casting Parts
• Molding Technics: Gravity Casting
• Application: Agricultural Machinery Parts
• Material: Carbon Steel
• Surface Preparation: Sand Blast
• Surface Roughness: Ra12.5
• Machining Tolerance: +/-0.02mm
• Standard: AISI
• Certification: ISO 9001:2000, ISO 9001:2008
• Heat Treatment: Normalizing or Quenching + Tempering
• Casting Tolerance: ISO8062-CT8
• Quality Control: Professional Inspection
• MOQ: 800kg
• OEM: Customized Service
• Transport Package: Wooden Case or According to Customer Requirements
• Specification: OEM/ODM
• Trademark: junlong
• Origin: China
• HS Code: 73089000

Product Description

 

Product Description

Custom cast steel material grade:

Steel Casting Mechanical Properties
Name	Number	Heat Treatment			Thickness	Rp0,2 (min)	Rm	A( min)
		Symbol	Norm/Austen	Tempering
			deg C	deg C	mm	MPa	MPa	%
GE200	1.042	+N		-	t =< 300	200	380-530	25
GS200	1.0449	+N	900-980	-	t =< 100	200	380-530	25
GE240	1.0446	+N		-	t =< 300	240	450-600	22
GS240	1.0455	+N	880-980	-	t =< 100	240	450-600	22
GS300	1.0558	+N	880-980	-	t =< 30	300	600-750	15
					30 < t =< 100	300	520-670	18
G17Mn5	1.1131	+QT	920-980	600-700	t =< 50	240	450-600	24
G20Mn5	1.622	+N	900-980	-	t =< 30	300	480-620	20
		+QT	900-980	610-700	t =< 100	300	500-650	22
G24Mn6	1.1118	+QT1	880-950	520-570	t =< 50	550	700-800	12
		+QT2	880-950	900-980600-650	t =< 100	500	650-800	15
		+QT3	880-950	650-680	t =< 150	400	600-800	18
G28Mn6	1.1165	+N	880-950		t =< 250	260	520-670	18
		+QT1	880-950	630-680	t =< 100	450	600-750	14
		+QT2	880-950	580-630	t =< 50	550	700-850	10
G20Mn5	1.5419	+QT	920-980	650-730	t =< 100	245	440-590	22
G10MnMoV6-3	1.541	+QT1	950-980	640-660	t =< 50	380	500-650	22
		+QT1	950-980	640-660	50 < t =< 100	350	480-630	22
		+QT2	950-980	640-660	t =<50	500	600-750	18
		+QT2	950-980	640-660	50 < t =< 100	400	550-700	18
		+QT3	950-980	740-760	t =< 100	400	520-650	22
G15CrMoV6-9	1.771	+QT1	950-980	650-670	t =< 50	700	850-1000	10
		+QT1	950-980	610-640	t =< 50	930	980-1150	6
G17CrMo5-5	1.7357	+QT	920-960	680-730	t =< 100	315	490-690	20
G17CrMo9-10	1.7379	+QT	930-970	680-740	t =< 150	400	590-740	18
G26CrMo4	1.7221	+QT1	880-950	600-650	t =< 100	450	600-750	16
		+QT2	880-950	550-600	t =< 100	550	700-850	10
G34CrMo4	1.723	+QT1	880-950	600-650	t =< 100	540	700-850	12
		+QT1	880-950	600-650	100 < t =< 150	480	620-770	10
		+QT2	880-950	550-600	t =< 100	650	830-980	10
G42CrMo4	17,231	+QT1	880-950	600-650	t =< 100	600	800-950	12
		+QT1	880-950	600-650	100 < t =< 150	550	700-850	10
		+QT2	880-950	550-600	t =< 100	700	850-1000	10
G30CrMoV6-4	1.7725	+QT1	880-950	600-650	t =< 100	700	850-1000	14
		+QT1	880-950	600-650	100 < t =< 150	550	750-900	12
		+QT2	880-950	530-600	t =< 100	750	900-1100	12
G35CrNiMo6-6	1.6579	+N	860-920		t =< 150	550	800-950	12
		+N	860-920		150 < t =< 250	500	750-900	12
		+QT1	860-920	600-650	t =< 100	700	850-1000	12
		+QT1	860-920	600-650	100 < t =< 150	650	800-950	12
		+QT2	860-920	510-560	t =< 100	800	900-1050	10
G9Ni14	1.5638	+QT	820-900	590-640	t =< 35	360	500 - 650	20
GX9Ni15	1.5681	+QT	800-850	570-620	t =< 30	380	550-700	18
G20NiMoCr4	1.675	+QT	880-930	650-700	t =< 150	410	570-720	16
G32NiCrMo8-5-4	1.657	+QT1	880-920	600-650	t =< 100	700	850-1000	16
		+QT1	880-920	600-650	100 < t =< 250	650	820-970	14
		+QT2	880-920	500-550	t =< 100	950	1050-1200	10
G17NiCrMo13-6	1.6871	+QT	890 -930	600-640	t =< 200	600	750 - 900	15
G30NiCrMo14	1.6771	+QT1	820-880	600-680	t =< 100	700	900-1050	9
		+QT1	820-880	600-680	100 < t =< 150	650	850-1000	7
		+QT2	820-880	550-600	t =< 50	1000	1100-1250	7
		+QT2	820-880	550-600	50 < t =< 100	1000	1100-1250	7
GX3CrNi13-4	1.6982	+QT	1000-1050	670-690	t =< 300	500	700 - 900	15
GX4CrNi13-4	1.4317	+QT	1000-1050	590-620	t =< 300	550	760-960	15
GX4CrNi16-4	1.4421	+QT1	1020-1070	580-630	t =< 300	540	780-980	15
		+QT2	1020-1070	450-500	t =< 300	830	1000-1200	10
GX4CrNiMo16-5-1	1.4405	+QT	1020-1070	580-630	t =< 300	540	760-960	15
GX23CrMoV12-1	14,931	+QT	1030-1080	700-750	t =< 150	540	740-880	15
Notation:
A = % elongation at fracture
R eH = Upper Yield Strength ( MPa )
R p0,2 = 0,2 % proof strength ( MPa )
R m = Tensile strength ( MPa )
HV = Hardness value (Vickers)
t = Product thickness for specified properties ( mm)
+N = normalized
+NT = normalized and tempered
+QT = quenched and tempered

Product Process

1.Simulation design (using software procast and magmasoft to conduct simulation experiments in advance)
2.Mold making (using high-quality aluminum plate as raw material for mold)

3.Wax pressing (The workshop is equipped with 16 automatic wax pressing machines, automatic molds are used for batch products, and the efficiency is 5 times higher than that of manual molds. Secondly, we also retain a manual wax-type station to solve the difficulties of small orders from old customers.)
4.Wax repair (to remove burrs and ensure product finish)
5.Wax assembly


6.Shell making (We use robotic arms shell making, with automatic circulating air trunk line, high production efficiency, stable product quality, the workshop is equipped with all kinds of temperature and humidity control equipment, to ensure the quality of the shell in the air drying process
7.Shell completion (the production site records the completion time of the shell in detail to ensure the quality and strength of the shell.)


8.Dewaxing (using steam dewaxing kettle inverted dewaxing to ensure that the dewaxing cavity is cleaner and the product surface quality is better)
9.Roasting (Using three-stage constant temperature tunnel baking furnace, temperature control is accurate, to ensure the shell strength, so that the product size uniformity is higher)
10.Material spectrum analysis (using Germany's advanced spectrometer, before work, select the appropriate steel standard sample according to the product material for proofreading, and then each furnace before and after two tests, all qualified test blocks are retained for more than 2 years for customer traceability)

11.Pouring  (Strictly control the quality of raw materials, each batch of raw materials for P, S tests to ensure that within the scope. The temperature gun is used to detect the temperature of molten steel during the pouring process, and the temperature of molten steel is controlled in strict accordance with the process requirements.
12.Shot blasting (shot blasting has crawler type, hook type, according to the customer's surface requirements for different products, you can choose 0.4, 0.6, 0.8, 1.0, 1.2 steel sand)
13.Heat treatment (The company has a number of heat treatment furnaces, can carry out normalizing, quenching, tempering, carburizing, solution and other types of heat treatment requirements, and the original heat treatment curve of each furnace will be retained for more than 2 years for customers to trace)
14.Mechanical property inspection (After each heat treatment, the inspector will analyze the hardness, metallography and mechanical properties of the product on the same day, and keep records for more than 2 years for customer traceability)

15.Machining gate (After the special tooling is removed by machining, the efficiency is higher and the product surface is more beautiful. Avoid the situation that the delivery is not timely due to the slow grinding labor)
16.Hydraulic press shaping (the factory has a number of hydraulic presses to solve the natural deformation in the casting and heat treatment process, the size of the reshaped will be 100% controlled by the gauge, reducing the processing amount and processing cost of the product)
17.Visual inspection (we will 100% check the appearance of the product for porosity, trachoma, cold insulation, welding nodules and other casting defects)
18.Non-destructive testing MT/PT/UT/VT/RT (According to customer requirements for sampling or full inspection, the company has 5 ASNT Level 2 qualified inspectors and 1 ASNT Level 3 qualified personnel.)
19.Machining (The company has hundreds of machining equipment, including vertical machining center, horizontal machining center, CNC milling machine, CNC lathes, drilling and tapping complex center, drilling machine, milling machine, etc., to meet customers)

20.Inspection of important dimensions (there are critical dimensions and non-critical dimensions in the shipping standard, we will use the gauge to conduct 100% inspection of the key dimensions, and 5 pieces/batches will be randomly checked in non-critical areas.)
21.Rust prevention (according to customer requirements, product surface treatment, such as: oil, rust inhibitor, color zinc plating, spray painting, hot dip galvanizing, nickel plating, dacromet,Pickling, blue etc........)
22.Packaging (can be customized according to customer requirements, such as: bubble bags, cartons, pallets, wooden cases, storage cages......)

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