| After-sales Service: | Support Online |
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| Warranty: | 1year |
| Type: | Alloy Steel Bar |
| Standard: | AISI, ASTM, GB, JIS, DIN, BS |
| Technique: | Hot Rolled |
| Application: | Structural Steel Bar, Tool Steel Bar, Die Steel Bar |
| Samples: |
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| Customization: |
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Carburized steel usually refers to steel that needs to be carburized, quenched, and tempered at low temperatures before use. It is generally low carbon high-quality carbon structural steel and alloy structural steel, also known as carbon carburized steel and alloy carburized steel, respectively. Its composition is characterized by a low carbon content, typically 0.1% to 0.25%; The main alloy elements include Ni, Cr, Mn, etc., and the auxiliary alloy elements include W, Mo, V, Ti, etc.
Alloyed carburized steel has high hardenability. Many machine parts, such as the gearbox gears of automobiles and tractors, cams, piston pins, and some measuring tools on internal combustion engines, are made of carburized steel.
| 3415/3310/1.5752/14NiCr14/SNC815(H)/36A/A12/15NiCr13/12CrNi3 | |||||||
| Grade | C | Si | Mn | P | S | Cr | Ni |
| minimum value | 0.14 | 0.2 | 0.45 | - | - | 1.4 | 3.25 |
| Maximum value | 0.19 | 0.35 | 0.6 | 0.025 | 0.025 | 1.75 | 3.75 |
| GB | ISC | CNS | JIS | KS | ASTM/AISI | UNS | ISO | DIN EN/DIN | W-Nr. | NF EN/NF | EN | Digital brand | GOST | BS EN/BS |
| 12CrNi3 | A42122 | SNC815 | SNC815 SNC815H |
SNC815 | 3310 | G33106 | 15NiCr13 | 14NiCr14 | 1.5752 | 14NC12 | 15NiCr13 | 1.5752 | 12ХН3А | 665A12 665M13 |
| DIN EN/DIN | NF EN/NF | EN | Digital brand |
| 55Si7 | 55Si7RR | 56Si7 | 1.5026 |
| Material Science: | Hot rolled/cold drawn/forged steel round steel |
| Process: | It is forged from vacuum degassed steel ingot. |
| Diameter: | 25mm - 1000mm (optional) |
| Length: | 1000mm-12000mm Straightness:3mm/M max(optional) |
| Process: | EAF+LF+VD+forging+heat treatment (optional) |
| Delivery conditions: | Hot forging+rough machining (black surface after Q/T)+double tempering. |
| Delivery time | 15-25 days |
| Minimum order quantity: | 5 tons |
| Heat treatment: | Normalizing/annealing/quenching/tempering (optional) |
| Technical data: | Chemical composition, physical properties and mechanical tests according to customer requirements |
| characteristic: | According to your requirements |
| Test: | Ultrasonic test according to SEP 1921-84 C/c and D/d (optional) |
| Tag: | Grade, heat resistant NO The length will be printed with the required color on each bar |
| Payment: | T T 30% in advance; The balance shall be paid against shipping documents or irrevocable letter of credit at sight before shipment |
| Terms of trade | FOB,C&F,EXW... |
Heat treatment of carburized steel
The heat treatment of carburized steel generally involves quenching and low-temperature tempering after carburization to obtain a high hardness surface layer and a strong and tough core. According to the differences in the composition of steel, there are several commonly used heat treatment methods.
(1) Pre cooling, direct quenching and low temperature tempering after carburization
This method is suitable for steels with low alloying element content and not easy to overheat, such as 20CrMnTi, 20CrTi, etc.
(2) Primary quenching
After carburizing, slowly cool to room temperature, reheat, quench, and temper at low temperature. Suitable for carbon steel, low alloy steel workpieces that are prone to overheating during carburization, and solid carburized parts.
(3) Double quenching
After carburizing, slowly cool to room temperature, reheat twice, quench, and temper at low temperature. Suitable for essentially coarse grain steels and workpieces with high performance requirements, but with long production cycles, high costs, and easy decarburization, oxidation, and deformation.
For steel grades such as 18Cr2Ni4WA with a high degree of alloying, if pre cooled and quenched after carburizing, there will be a large amount of residual austenite in the carburized layer, resulting in a decrease in hardness. For this reason, carburizing and air cooling are used in production, followed by high-temperature tempering to decompose residual austenite, followed by heat quenching and low-temperature tempering
Heat treatment of spring steel
Steel grade Quenching temperature Quenching medium hardness requirements Tempering temperature Cooling medium hardness requirements Application range
65780-830 water or oil 400-600 coil springs and spring washers with a wire diameter less than 12-15mm
65Mn810-830 oil or water>60 370-400 water 42-50 5-10mm plate spring and 7-10mm coil spring
50CrV850-870 Oil>58 400-55 Water 45-50 Large and important plate springs and coil springs
High temperature spring with 50CrV850-870 oil>58 370-420 oil 45-52 operating below 300C
60Si2MnA860-880 oil>60 500-520 water HB363-444 plate spring with a thickness of 8-12mm
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Packaging |
1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips.
2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles |
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20 feet container contains dimension
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Length under 6000mm
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40 feet container contains dimension
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Length under 12000mm
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By bulk vessel
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Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo
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1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.
2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;
3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.
5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese
6. How can we get your price?
A. We need the following information to quote for you:
1). Product Name
2). standard
3). Material grade (chemical composition)
4). dimension
5). amount
6). Special part drawing
Suppliers with verified business licenses
Audited Supplier 
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