AISI SAE 4140 Alloy Steel for Oil & Gas, Automotive

• After-sales Service: Can Exchange Goods
• Warranty: 2 Year
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar, Carbon Structural Steel
• Model NO.: AISI 4140 42CrMo4 1.7225 SCM440
• Surface Treatment: According to Customer Requirements
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Machined or Not: Machinable
• Length: Customer Requirements or Otherwise
• Custom Size: Customizable
• Custom Material: Customizable
• Transport Package: Standard Sea Transport Packaging
• Specification: 6mm-150mm or other size
• Origin: China
• HS Code: 722850
• Production Capacity: 300000tons/Year

Product Description

 Product Description

AISI 4140 is an alloy steel, also known as chrome-molybdenum steel, which has excellent strength and heat resistance and is widely used in many fields.

AISI 4140 steel is made of iron, carbon, chromium, molybdenum and small amounts of other elements. Among them, chromium and molybdenum are the main alloying elements, which give 4140 steel excellent mechanical properties and heat resistance. The high alloy content of the steel gives it excellent hardness, tensile strength and wear resistance.

Different mechanical properties of 4140 steel can be obtained by adjusting the heat treatment process. By normalizing (annealing) the steel can obtain lower hardness and better workability. By quenching and tempering treatment, the steel can reach a higher hardness and strength. Quenching is the rapid cooling of steel heated to the appropriate temperature to achieve the purpose of high hardness. Tempering is the reheating of the quenched steel to reduce its brittleness and improve its toughness. Different heat treatment processes can adjust the mechanical properties of steel according to specific requirements.

AISI 4140 steel is also characterized by excellent corrosion resistance and fatigue resistance. It is widely used in machinery manufacturing, automotive industry, oil and gas extraction, aerospace and other fields. 4140 steel is often used in the manufacture of bearings, gears, connecting rods, sliders, hydraulic pipes and other high strength and wear resistance parts.

In summary, AISI 4140 is an alloy steel with excellent mechanical properties, heat and corrosion resistance, whose mechanical properties can be adjusted by appropriate heat treatment processes. It is widely used in several industrial fields, especially in applications requiring high strength and wear resistance.

Detailed Photos

 

 

Product Parameters

Standard	Grade	C	Si	Mn	P	S	Cr	Ni	Mo
ASTM A29	4140	0.38-0.43	0.15-0.35	0.75-1.00	≤ 0.035	≤ 0.04	0.8-1.1	-	0.15-0.25
EN10083	42CrMo4	0.38-0.45	≤ 0.4	0.6-0.90	≤ 0.025	≤ 0.035	0.9-1.2	-	0.15-0.30
	1.7225
JIS G4105	SCM440	0.38-0.43	0.15-0.35	0.6-0.85	≤ 0.035	≤ 0.04	0.9-1.2	-	0.15-0.30
GB 3077	42CrMo	0.38-0.45	0.17-0.37	0.5-0.80	≤ 0.035	≤ 0.035	0.9-1.2	-	0.15-0.25
BS 970	EN19	0.35-0.45	0.15-0.35	0.5-0.80	≤ 0.035	≤ 0.035	0.9-1.5	-	0.2-0.40

Physical Property

Density g/cm3	7.85
Melting point °C	1416
Poisson's ratio	0.27-0.30
Machinability (AISI 1212 as 100% machinability)	65%
Thermal expansion co-efficient µm/m°C	12.2
Thermal conductivity W/(m.K)	46
Modulus of elasticity 10^3 N/mm2	210
Electric resistivity Ohm.mm2 /m	0.19
Specific heat capacity J/(kg.K)	460
Modulus of elasticity 10^3 N/mm2	100 ºC	200 ºC	300 ºC	400 ºC	500 ºC
	205	195	185	175	165
Thermal expansion 10^6 m/(m.K)	100 ºC	200 ºC	300 ºC	400 ºC	500 ºC
	11.1	12.1	12.9	13.5	13.9

Mechanical Property

Mechanical Condition	R	S	S	T	U	V	W
Ruling Section mm	250	250	150	100	63	30	20
Tensile Strength Mpa	700-850	770-930	770-930	850-1000	930-1080	1000-1150	1080-1230
Yield Strength Mpa Min	480	540	570	655	740	835	925
Elongation %	15	13	15	13	12	12	12
Izod Impact J Min	34	27	54	54	47	47	40
Charpy Impact J Min	28	22	50	50	42	42	35
Hardness Brinell HB	201-255	233-277	233-277	248-302	269-331	293-352	311-375

Annealing

After Forged,AISI 4140 steel  may be annealed .Annealing temperature should be carried out between 800ºC-850ºC, hold suitable time for the steel to be thoroughly heated. Cool slowly in the furnace.This treatment will form a structure suitable for machining.The maximum Hardness is 241 HB.

Hardening

This heat treatment will obtain martensite structure  after quenched.It should be carried out between 840ºC-875ºC, hold suitable time for the steel to be thoroughly heated, soak for 10-15 minutes per 25 mm section, and quench in oil, water, or polymer as required.Tempering should be followed  immediately after quenched.

Tempering

Tempering is usually carried out to relieve stresses from the hardening process, but primarily to obtain the required  hardness and mechanical properties. The actual tempering temperature will be chosen to meet the required properties.Heat the AISI 4140 carefully to a suitable temperature ,usually between 550ºC-700ºC, soak at the temperature for 2 hours per 25mm of ruling section, then cool in air.Tempering between 250ºC-375ºC is not avoided as tempering within this range will seriously reduce the impact value,result in temper brittleness .

Application

AISI 4140 steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.
Typical applications for 4140 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

Company Profile

Shandong Shanshui Special steel pipe Co.,LTD. Our company was founded in 2014, The headquarters is located in 14th floor, Rongfu Center, Huangshan Road,Liaocheng ,Shandong Province,China.
We specialized in the research and development,production,sales and application promotion of seamless steel pipe. We can provide customer-required Standard,Specification,Material,Application of Carbon steel tube,Alloy steel tube and their machined products etc.    
We have ten years of industry experience, the annual output of the factory is 250,000 tons, non-standard steel tube, super thick wall steel tube, alloy steel tube, super long steel tube, fixed size steel tube are our production advantages.

 

We have perfect production equipment: 
· 50 production workshop        · 76 production workshop        · 90 production workshop 
· 60 Cold Rolling Resources Units(OD10-159mm,THK2-20mm)
Our factory can provide customers with product testing and steel tube machining services,
"OWN PRODUCTION &SALES" production mode, flexible to meet customer needs,for customers to save money.
Our factory's product quality is guaranteed, workshop production control is strict, coordination ability is strong, timely delivery. 
Excellent quality and perfect service are the premise and guarantee to create maximum value for customers!
 

 

Shandong Shanshui Special Steel Co., Ltd. is very honored to receive distinguished customers from Iran, Japan, India and other countries. They came to visit our company and were very satisfied with our workshop facilities and production environment.
We displayed advanced processing machinery and technical equipment, allowing customers to witness our production capacity and quality assurance system. Customers have highly appreciated our production workshops and expressed their recognition and trust in our company.
Customers have shown great interest in the quality and technical level of our products. In the warm reception at the same time, we reached an order contract with the customer. Through the signing of contracts, we have established a long-term and stable partnership with customers.
We sincerely thank foreign customers for their trust and support, at the same time we welcome friends from all over the world to visit the factory, we will be warm hospitality through our joint efforts to promote the smooth progress of cooperation, to achieve mutual benefit and win-win goals.

 

Certifications

 

FAQ

 

What kind of company is Shandong Shanshui Special Steel Co., LTD.?
Shandong Shanshui Special Steel Co., Ltd. is a reputable manufacturer and supplier of top-quality steel products in Shandong province, China. With our dedication to excellence, we specialize in producing a wide range of steel pipes including seamless, welded, and alloy steel pipes.

Our company is committed to providing customers with high-quality and reliable steel products. We have built a strong reputation both domestically and internationally for our consistent product quality and customer satisfaction.

Where is the factory of Shandong Shanshui Special Steel Co., LTD.?

Factory :Zhangshan Industrial Park, Guangping Township, Liaocheng City,Shandong
We have 50, 76, 90, a total of three large hot-rolled seamless steel pipe production lines, and there are 10 fine rolled seamless steel pipe production lines. Among them, the 90-line configuration of Assel limited mandrel rolling machine is the strongest three-roll rolling capacity in China, and with the two-roll sizing machine, it is the only production line that can produce ultra-thick wall specifications and ultra-long steel pipes. We can accept non-standard steel pipe, super thick wall alloy steel pipe, we produce and sell by ourselves, fast delivery, to provide efficient solutions for customers' steel needs.
How about our product quality and after-sales service?
My factory finishing rolling tube in Liaocheng first product quality assurance service, that is: product quality problems, our company can undertake replacement, return and other quality assurance services. Execution in the workshop: process card, work order, 2-hour quality inspection, entrance inspection, exit inspection, etc., to ensure that unqualified products do not produce and do not leave the factory.
What can you buy from us?

Shandong Shanshui Special Steel Co., Ltd. can provide various types of steel pipes, including but not limited to:

   1.Seamless steel pipes: Suitable for high temperature, high pressure, and special applications in industries such as petroleum,natural gas, chemical, and power.

   2.Welded steel pipes: Suitable for general industrial, construction, and structural purposes, such as buildings, bridges, and machinery manufacturing.

   3.Alloy steel pipes: Treated with alloy elements, these pipes have high strength, wear resistance, and corrosion resistance. They are widely used in industries such as petroleum, chemical, power, and aerospace.

   4.Oil pipes: Used for oilfield development and oil transportation, these pipes are resistant to high temperatures and corrosion.

   5.Gas pipes: Used for natural gas transportation, these pipes have high pressure and corrosion resistance.

   6.Hydraulic support pipes: Used in mining, construction, and mechanical equipment as hydraulic supports, these pipes have high strength and corrosion resistance.

In addition, we also provide customized steel pipe products. We can manufacture pipes with special specifications, materials, and processing requirements based on customer needs.