AISI 4140 Alloy Steel
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Subclassification：
Alloy Steel Plate
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Product introduction
Hot Rolled Alloy Steel Plate 1.7225 42CrMo4 4140 42CrMo
1: 4140 steel introduction
AISI SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like axles, shafts, bolts, gears and other applications. Similar to alloy grade AISI 4130 chrome moly alloy steel but with a slightly higher carbon content. The higher carbon content of AISI 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels, however it does have inferior weldability characteristics..
2: 4140 Steel equivalent
| Country | Japan | Germany | Britain | USA | China | Australia |
| Standard | JIS G4105 | DIN 17200 | BS970 | ASTM A29 | GB/T 3077 | AS 1444 |
| Grade | SCM440 | 42CrMo4/1.7225 | EN19/709M40 | 4140 | 42CrMo | 4140 |
3: 4140 steel chemical composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.0 | 0.035 | 0.04 | 0.8-1.1 | 0.15-0.25 | |
| 42CrMo4 | 0.38-0.45 | 0.4 | 0.6-0.9 | 0.035 | 0.035 | 0.9-1.2 | 0.15-0.3 | |
| EN19 | 0.35-0.45 | 0.1-0.35 | 0.5-0.8 | 0.05 | 0.05 | 0.9-1.5 | 0.2-0.4 | |
| SCM440 | 0.38-0.43 | 0.15-0.35 | 0.6-0.85 | 0.03 | 0.03 | 0.9-1.2 | 0.15-0.3 |
4: 4140 steel mechanical properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
5: 4140 steel overviews
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm |
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| Width 20mm-1000mm |
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| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
| Application | 4140 alloy steels are used for Components, Adapters, Arbors,strippers, holder blocks, mold bases, ejectors, back up and support tooling, fixtures, jigs, molds, cams, drill collars, Axle Shafts, Bolts, Crankshafts,stubs, couplings, reamer bodies, axles, shafting, piston rods, rams, hydraulic machinery shafts, gears, sprockets, gear racks, chain links, spindles, tool bodies, tool holders, tie rods, Connection Rods, Chuck Bodies, Collets, Conveyor Pins & Rolls, Ejector Pins, Forks, Gears, Guide Rods, Hydraulic Shafts & Parts,Lathe Spindles, Logging Parts, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pinions, Pump Shafts,boring bars,tracks, slides, wear strips or parts, forming dies, brake dies, trim dies, bolsters, machinery parts and components, etc.. | |
5. 4140 Steel Application
4140steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.
Typical applications for Scm440 steel uses include:forged gears,spindles,fixtures,jigs,collars,Axles,conveyor parts,crow bars,logging parts,shafts,sprockets,studs,pinions,pump shafts, rams, and ring gears etc
6.Quality control:
1. Melting Process: EAF/BOF+LF+VD resulting in ingots
2. Both ends cut by saw
3. Ratio of forging:minimum 3:1
4. Grain size of final product: according to ASTM E112 more than 5,preferred more than 8
5. Ultrasonic test: As per SEP1921 Class C/c or D/d
7.Heat treatment of 4140 Steel
Quenched and Tempered (+QT) of 4140 Steel
1. Heat 4140 steel slowly to 840-875°C;
2. Soak at this temperature then quench in oil;
3. Temper as soon as 4140 reach room temperature (20°C);
4. Heat uniformly to the suitable temperature of 560°C;
5. Withdraw the material from the furnace and cool in the air.
Annealing of 4140 Alloy Steel
1. Heat the 4140 slowly to 800-850°C and allow enough time.
2. Cool slowly in the furnace to 480°C followed by air cooling
Factory
Shandong Jiugang Metal Products Co., Ltd. located in Shandong Province, with a factory area of 20000 square meters. We have obtained ISO9001 quality system certification and EU CE certification.
Packing And Delivery
We adhere to the management principle of "quality first, service first, continuous improvement and innovation, and customer satisfaction", with the quality goal of "zero defects, zero complaints". We are pleased to receive your inquiry and will reply as soon as possible.
Application
The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.
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FAQ
Q1: Are You Manufacture or Trade Company?
A1: We are the professional manufacturer of stainless/carbon/galvanized steel products located in China. Welcome to contact us and visit our factory before you place orders.
Q2: Can I get free samples?
A2: Of course you can. We can produce according to your samples or technical drawings. Contact us by whatsapp or email to get free samples and you will get the sample after 3-7 working days.
Q3: How do you guarantee the quality?
A3: We can send free samples to you, we can accept third-party testing. We also have test certificate, every batch goods will be testing before shipment, and the testing report will delivery to you with your goods.
Q4:How many coutries you already exported ?
A4: Exported to more than 50 countries mainly from Qatar, America, Russia, Belarus, Saudi Arabia, United Arab Emirates, Kuwait, Brazil, Egypt, Turkey, Jordan, India, etc.
Q5:How long is your delivery time?
A5:Within 5 days for stock size, 7-15 working days for customized size.
Q6: Can you OEM or ODM?
A6: Yes, we have a strong developing team. The products can be made according to your request
Q7: What is the MOQ?
A7: If you are scheduling to place a small quantity order or trial order, feel free to contact us, we can meet your requirements.
Q8:What are the certifications for your products?
A8:We have ISO 9001, MTC, third parties' inspections are all available such SGS, BV ect.
Contact Us For Quotation
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Office Address
15-10, Building J1, Wanda Plaza, 57 Gongye South Road, Jinan District, China (Shandong) Pilot Free Trade Zone
