SHANGHAI UNITE STEEL
| Payment Terms | L/C, T/T, D/A, D/P |
| Supply Ability | 1000 Metric Tons per Month |
| Delivery Time | 15-35 days |
| Packaging Details | In standard export packing and seaworthy material with rectangular shape bundle, covered with tarpaulin, in ontainers or in bulk, or upon request |
| Matrial | Alloy Steel |
| Standard | GB, ASTM, DIN,JIS |
| Grade | 4140 (G41400) |
| Diameter | 12-320mm |
| Length | Below 16 meters |
| Shape | Round bar |
| Techniques | Cold drawn; Hot rolled; Cold rolled; Forged |
| Surface | Black, Bright, Polished, Peeled, or upon request |
| Ultrasonic Test | 100% UT Passed |
| Processing | Annealed or Quenched and tempered provided |
| End | Beveled, plain end as required |
| Quality Inspection | SGS, BV etc. |
| Service | Cutting service and 3rd party inspection is provided |
| Brand Name | UST |
| Model Number | ASTM 4140 |
| Certification | ISO 9001:2008 |
| Place of Origin | MAINLAND CHINA |
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Product Specification
| Payment Terms | L/C, T/T, D/A, D/P | Supply Ability | 1000 Metric Tons per Month |
| Delivery Time | 15-35 days | Packaging Details | In standard export packing and seaworthy material with rectangular shape bundle, covered with tarpaulin, in ontainers or in bulk, or upon request |
| Matrial | Alloy Steel | Standard | GB, ASTM, DIN,JIS |
| Grade | 4140 (G41400) | Diameter | 12-320mm |
| Length | Below 16 meters | Shape | Round bar |
| Techniques | Cold drawn; Hot rolled; Cold rolled; Forged | Surface | Black, Bright, Polished, Peeled, or upon request |
| Ultrasonic Test | 100% UT Passed | Processing | Annealed or Quenched and tempered provided |
| End | Beveled, plain end as required | Quality Inspection | SGS, BV etc. |
| Service | Cutting service and 3rd party inspection is provided | Brand Name | UST |
| Model Number | ASTM 4140 | Certification | ISO 9001:2008 |
| Place of Origin | MAINLAND CHINA | ||
| High Light | alloy steel round bar ，spring steel round bar ，hot rolled round bar | ||
AISI / SAE 4140 Hot Rolled Alloy High Tensile Steel Bar / Rod 12-320mm
INTRODUCTION
Alloy Steel 4140, also sold under the name AISI/SAE 4140, is a low alloy steel that contains chromium, molybdenum, and manganese. Known for its impact and abrasion resistance, Alloy Steel 4140 also offers users outstanding fatigue and torsional strength. Welding is possible through most popular techniques, and it has a high level of ductility. Machinability is possible in the annealed condition, while Alloy Steel 4140 takes cold working, heating, and quenching well.
APPLICATIONS
Due to its toughness and other positive characteristics, Alloy Steel 4140 is found in a wide variety of applications such as:
-Dimension: Diameter 4-1600 mm, any length below 16 meters
-Delivery Conditions:
Cold drawn: 4-100 mm
Peeled: 30-160 mm
Grinded: 4- 600 mm
Turned: 130-1200 mm
Hot rolled: 12-320 mm
Hot forged: 130-1600 mm
-EAF+(ESR) or EAF+LF+VD+(ESR)
-HOT rolled; Cold rolled; Forged; Cold Drawn
-Heat Treatment: Untreated, Annealing, N+T, Q+T
-Smelting: EAF+LF+VD (+ESR)
-Surface Finish: Black, Rough Machined, Peeled, Turned or upon request
-UT 100% passed
-Cutting service provided
-Third Party inspection is acceptable (SGS, BV etc.)
COMMON 4140 STEEL EQUIVALENCY
| Country | USA | German | British | Japan | China | Australia |
| Standard | ASTM A29 | DIN 17200 | BS 970 | JIS G4105 | GB/T 3077 | AS 1444 |
| Grades | 4140 | 1.7225/ 42crmo4 | 42CrMo4 | SCM440 | 42CrMo | 4140 |
4140 STEEL BAR CHEMICAL COMPOSITION
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A29 | 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.040 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
| EN 10250 | 42CrMo4/ 1.7224 | 0.38-0.45 | 0.6-0.9 | 0.035 | 0.035 | 0.4 | 0.9-1.2 | 0.15-0.30 |
| JIS G4105 | SCM440 | 0.38-0.43 | 0.60-0.85 | 0.03 | 0.03 | 0.15-0.35 | 0.9-1.2 | 0.15-0.30 |
MECHANICAL PROPERTIES OF AISI ALLOY 4140 STEEL BAR
| Properties | Metric | Imperial |
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
Machining
AISI 4140 has good machinability. Operations such as turning, hobbing, drilling, sawing, broaching, tapping and milling can be easily performed using the recommendations provided by the machine's manufacturer for ideal tool type-feeds and speeds. AISI 4140 has the following properties:
Weldability
AISI 4140 is difficult to weld, but welding can be performed using any of the common welding practices. Welding can be done by preheating the section and ensuring that stress relieving takes place after welding. It is basically recommended that welding of AISI 4140 steel in the hardened and tempered condition should be avoided as it changes the mechanical properties within the weld heat affected zone. Likewise welding in the nitrided, flame or induction hardened condition is not recommended. However welding of AISI 4140 chrome-molybdenum steel in the annealed condition is widely preferred. In case welding in the hardened and tempered condition is required, the workpiece must be cooled instantly and the stress is relieved at 15°C below the original tempering temperature.
When welding AISI 4140 steel (in any condition) only low hydrogen electrodes should be used.
Follwoing welding, the maximum cooling rate that should be employed is 95°C /hr down to 95°C. This should be followed by cooling in still air. The cooling rate can be slowed by wrapping the work piece in a heat resistant blanket or burying it in sand.
Heat Treatment
There are various heat treatments of the AISI 4140 Chrome-Molybdenum High Tensile Steel which are: Forging; Stress relieving; Annealing; Normalizing; Nitriding; Tempering; Flame and induction hardening; Hardening.
Forging
Can be heated to 1150°C and maintained until uniform
Minimum forging temperature 850°C
Can be cooled slowly in sand or ash
Stress Relieving
Hardened: Heat to 500°C – 550°C
Annealed: Heat to 600°C – 650°C
Cool in still air
Annealing
Heat to 830°C – 850°C
Furnace cool
Normalizing
Nitriding
Tempering
Flame and Induction Hardening
All materials consisting of de-carburized surfaces should be removed to ensure best results.
Hardening
What we can offer?
-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
Shape Available
Our Advantages
OUR MAIN PRODUCTS ARE LISTED AS BELOW
Notes:
Available Size:
-Round: Dia. 4-1600 mm
-Flat: T. 10-120 mm x W. 60-810 mm
-Block: T. 80-1200 mm x W. 100-1600 mm
PAYMENT AND SHIPPING
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples
COMPANY INFORMATION
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.
In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
10000000-25000000
Employee Number:
50~110
Ecer Certification：
Active Member
We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national... We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national...
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