Seamless steel pipe for general use: it is made of high-quality carbon steel such as 10, 20, 30, 35 and 45, low-alloy structural steel such as 16Mn and 5mnv, or alloy steel such as 40Cr, 30CrMnSi, 45Mn2 and 40MnB. 10. Seamless pipes made of low carbon steel such as 20 are mainly used for fluid transmission pipelines. Seamless pipes made of medium carbon steel such as 45 and 40Cr are used to manufacture mechanical parts, such as stressed parts of automobiles and tractors. Generally, the strength and flattening test of seamless steel pipe shall be ensured. Hot rolled steel pipes shall be delivered in hot rolling state or heat treatment state; Cold rolling is delivered in heat treated condition.
Welcome to TradeChina
cold rolled AISI 4130 4140 5140 chromoly steel pipe and tube
FOB Reference Price
Purchase quantity ()
Minimum order quantity
Payment
Meorient Import & Export Co.LTD
China - Hangzhou
Trading Company
Trade Capacity
Export Percentage
Nearest Port
Hangzhou,Shanghai
Accepted Delivery Terms
Employees
5-10人
Accepted Payment Currency
USD,CNY
Average Lead Time
45 Day(s)
Certifications
Product Specifications
--Product Description
Product Description
16Mn is called low alloy high strength structural steel: the carbon content is 0.1% - 0.25%, and the main alloy elements manganese (MN), silicon (SI), vanadium (V), niobium (NB) and titanium (TI) are added.
16Mn is the old country's brand number, which is classified as low-alloy high-strength structural steel, and the brand is called Q345B. However, Q345B steel is the replacement of 12mnv, 14MnNb, 18nb, 16mnre, 16Mn and other old steel grades, not just 16Mn steel.
Its total alloy content is less than 3%. According to the strength, it is divided into four levels: 300, 350, 400 and 450MPa. There are mainly Q235, Q345, Q390, Q420 and Q460 "Q" is the Chinese Pinyin capital prefix of the yielding "Qu", and the subsequent number is the minimum yield point of the brand（ σ s) The subsequent symbols are divided into a, B, C and d according to the content of impurity elements (sulfur and phosphorus) of the steel from high to low and with the change of carbon and manganese elements. Grade A and B steels are usually called 16Mn
16Mn is a kind of steel. A name for steel material.
16Mn steel belongs to carbon manganese steel, the carbon content is about 0.16%, and the yield point is equal to 343mpa (the strength grade belongs to 343mpa). 16Mn steel has less alloy content and good weldability. Generally, preheating is not necessary before welding. However, since the hardening tendency of 16Mn steel is slightly greater than that of low carbon steel, preheating measures shall be taken to prevent cold cracks when welding at low temperature (such as outdoor operation in winter) or on structures with large rigidity and thickness
The materials of alloy pipes are roughly as follows:
16-50Mn,27SiMn,40Cr,12-42CrMo,16Mn 12Cr1MoV,
T91,27SiMn,30CrMo,15CrMo,20G,Cr9Mo,
10CrMo910,15Mo3,15CrMoV,35CrMoV,45CrMo ,
15CrMoG, 12CrMoV, 45Cr, 50Cr, 45crnimo, etc
1010 S10C
High quality carbon structural steel 10# pipes contain no other alloy elements (except residual elements) except carbon (c) and alloy elements containing a certain amount of silicon (SI) (generally not more than 0.40%) and manganese (MN) (generally not more than 0.80%, higher to 1.20%) for deoxidation.
● 10# steel pipe grade: 10 steel 10# steel pipe chemical composition: carbon C: 0.07 ~ 0.14 "Silicon Si: 0.17 ~ 0.37 manganese Mn:0.35 ~ 0.65 sulfur s: ≤ 0.04 phosphorus P: ≤ 0.035 chromium Cr: ≤ 0.15 nickel Ni: ≤ 0.25 copper Cu: ≤ 0.25 ● 10# steel pipe mechanical properties: tensile strength σ B (MPA): ≥ 410 (42) yield strength σ S (MPA): ≥ 205 (25) elongation δ 5 (%): ≥ 25 reduction of area ψ (%): ≥ 5, hardness: no heat treatment, ≤ 156hb, sample size: sample 25mm ● 10# steel pipe heat treatment specification and metallographic structure: heat treatment specification: normalizing, 910 ℃, air cooling. Metallographic structure: ferrite + pearlite. ● 10# steel pipe delivery status: no heat treatment or heat treatment (annealing, normalizing or high temperature tempering) Delivery in condition. If delivery in heat treatment condition is required, it shall be indicated in the contract. If it is not indicated, it shall be delivered without heat treatment. The content of sulfur (s) and phosphorus (P) impurity elements is generally controlled below 0.035%. If it is controlled below 0.030%, it is called high-grade high-quality steel, and "a" shall be added after its brand, such as 20A; if P is controlled below 0.025% and S is controlled below 0.020%, it is called super grade high-quality steel, and "e" shall be added after its brand to show the difference. For other residual alloy elements brought into the steel by raw materials, such as chromium (CR), nickel (Ni) and copper (Cu) are generally controlled at Cr ≤ 0.25%, Ni ≤ 0.30% and Cu ≤ 0.25%. Some brands have manganese (MN) content of 1.40%, which is called manganese steel.
1020 S20C
Cold rolled (drawn) seamless steel pipe includes carbon thin-walled steel pipe, alloy thin-walled steel pipe, stainless steel thin-walled steel pipe, stainless thin-walled steel pipe and special-shaped steel pipe in addition to general steel pipe, low and medium pressure boiler steel pipe, high-pressure boiler steel pipe, alloy steel pipe, petroleum cracking pipe and other steel pipes. The outer diameter of hot-rolled seamless pipe is generally greater than 32mm and the wall thickness is 2.5-75mm. The diameter of cold-rolled seamless steel pipe can be up to 6mm and the wall thickness can be up to 0.25mm. The outer diameter of thin-walled pipe can be up to 5mm and the wall thickness is less than 0.25mm. Cold rolling has higher dimensional accuracy than hot rolling.
1045 S45C
45 steel is a high-quality carbon structural steel with low hardness and easy cutting. It is often used as formwork, shoot, guide post, etc. in the mold, but it must be heat treated.
1. 45 steel is qualified if its hardness is greater than HRC55 (up to HRC62) after quenching and before tempering. The highest hardness for practical application is HRC55 (high frequency quenching hrc58).
2. The heat treatment process of carburizing and quenching shall not be adopted for 45 steel. The quenched and tempered parts have good comprehensive mechanical properties and are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts working under alternating load. However, the surface hardness is low and not wear-resistant. Quenching and tempering + surface quenching can be used to improve the surface hardness of parts.
Chemical composition editing voice
Carbon C: 0.28 ~ 0.33
Silicon Si: 0.15 ~ 0.35
Mn: 0.40 ~ 0.60
Sulfur s: allowable residual content ≤ 0.040
Phosphorus P: allowable residual content ≤ 0.035
Cr: 0.80 ~ 1.10
Nickel: allowable residual content ≤ 0.030
Copper Cu: allowable residual content ≤ 0.030
Mo: 0.15 ~ 0.25
Mechanical properties editing voice
Tensile strength σ B (MPA): ≥ 930 (95) yield strength σ s (MPa):≥785(80)
Elongation δ 5 (%):≥12
Reduction of area ψ (%):≥50
Impact energy Akv (J): ≥ 63
Impact toughness value α kv (J/cm2):≥78(8)
Hardness: ≤ 229hb
4140 4130 alloy steel pipe
4140 chemical composition:
Carbon C: 0.33 ~ 0.48
Silicon Si: 0.15 ~ 0.35
Mn: 0.75 ~ 1.00
Sulfur s: ≤ 0.030
Phosphorus P: ≤ 0.030
Cr: 0.80 ~ 1.10
Mo: 0.15 ~ 0.25
Detailed Images
Widely used in automotive accessories:
shock absorber,
Camshaft,
fuel pump,
oil pump,
condenser,
column
material | 45# 1045 S45C STKM13C | |
Applicatin field | automobile parts, mechanical processing, motorcycle parts, ship parts.etc | |
Technology | cold rolled | |
Tolerance | ± 0.1mm | |
tensile strength:513 Yield strength:360 Elongation :30% | ||
Characteristics of Finished Steel Pipe:
1. Cold-rolled precision steel pipe has high tolerance dimension accuracy, product precision is controlled at (+0.5mm), good inner and outer surface finish, and no oxide layer on the surface.
2. Precision cold-rolled steel pipe has excellent comprehensive performance, can withstand high pressure, cold bending, flattening, no cracking, no wrinkle, and can do all kinds of complex deformation and mechanical processing.
Packing & Delivery
We use braided tape for winding and binding packaging
application area
Quenching and tempering can change mechanical properties
tensile strength
Yield Strength
Elongation
Precision steel pipes are widely used in automobiles, motorcycles, electric vehicles, petrochemical, electric power, ships, aerospace, bearings, pneumatic components, seamless steel pipes for medium and low pressure boilers, etc. They can also be applied to steel sleeves, bearings, hydraulic, mechanical processing and other fields!
Alloy pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, alloy steel pipe has lighter weight when its bending and torsional strength is the same. Alloy steel pipe is an economic section steel, which is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. Making ring parts with alloy steel pipe can improve the material utilization rate, simplify the manufacturing process, save materials and processing hours, such as rolling bearing ring, jack sleeve, etc. at present, steel pipe has been widely used for manufacturing. Alloy steel pipe is also an indispensable material for all kinds of conventional weapons. Gun barrel and barrel should be made of steel pipe. Alloy steel pipe can be divided into round pipe and special-shaped pipe according to different cross-sectional area and shape. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by circular pipe. In addition, when the ring section bears internal or external radial pressure, the force is more uniform. Therefore, most steel pipes are round pipes
About us
Our services
1. We have multiple production lines and large storage capacity.
2. We have a professional foreign trade team with many years of experience.
3. We have strict inspection process and equipment to strictly inspect products.Customer evaluation
We are exported to all countries in the country and have been highly praised by our customers.
Transportation and payment
We support sea, air, land and other modes of transportation and payment.
FAQ
Q: How about the delivery terms?
A: 1. Payment: T/T, 30% deposit in advance and balance before delivery.
2. Min. Order Quantity:3TON or as required.
3. Transportation: By express (DHL,TNT,),air,sea,and train.
Q: Do you accept sample order?
A: Yes sure, please contact us for details.
Q: How about your after-sales service?
A: As a professional steel exporter, we offer promote technology support for all problems and questions.
Besides, we accept goods return or replace for quality problem.
Q: How does your company control the quality?
A: Quality first. In order to guarantee high quality for our products,
Modern always makes a serious inspection for all products and raw materials in strict procedure.
Why choose us?
1. We're Gold Supplier. Evaluated by Alibaba.
2. More than 9 years exprience, especially in cold rolled steel pipe industrty.
3. Export to Korea, Pakistan, Brazil, Russia, India, Vietnam and other countries
4. Work with many famous brands, such as Tisco, Baosteel.
5. Quick response to your inquiry.
Timely communication and feedback.
6. Samples could be provided.
7. Excellent production technology.
Different shapes of products can be cut and provided.
8. Strong production capacity. Fast delivery capacity. Quick supply capacity.
9. Strict Quality Control and Inspection in every process.
Our Advantages
1. We are a specialized manufacturer. Competitive price and quality from our own factory .
2. Best service with 24 hour`s reply .
3. Flexible payment with T/T,L/C , etc .
4. Smooth production ability(1000tons/month).
5. Quick delivery and standard exporting package .
No desirable products?
Sourcing assistant>
How to start your business
- Step 1Find your interested products by search keywords
- Step 2Contact the supplier by clicking ”Enquire” or “request meeting” button, otherwise, you also could consult our import consultant.
- Step 3After verifying your email, get response from suppliers or our trade manager will contact you as soon as possible
- Step 4Set up meeting with the Chinese supplier without language barrier