| Customization: | Available |
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| After-sales Service: | Support Online |
| Warranty: | 1year |
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Medium carbon quenched and tempered structural steel is commonly used. The cold plasticity of the steel is general, and annealing and normalizing are slightly better than quenching and tempering. It has higher strength and better machinability. After proper heat treatment, it can obtain certain toughness, plasticity and wear resistance, and the material source is convenient. Suitable for hydrogen welding and argon arc welding, not suitable for gas welding. Preheating is required before welding, and stress relief annealing shall be carried out after welding. Normalizing can improve the cutting performance of blanks with hardness less than 160HBS. After quenching and tempering treatment, the comprehensive mechanical properties of this steel are better than those of other medium-carbon structural steels, but the hardenability of this steel is low, the critical hardenability diameter in water is 12~17mm, and there is a tendency to crack during water quenching. When the diameter is greater than 80mm, its mechanical properties are similar after quenching and tempering or normalizing. High strength and toughness can be obtained after quenching and tempering of medium and small mold parts. It can be used to make rivet core
| 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... |
| condition | Heat treatment or condition | tensile strength σb Mpa |
Yield point σs Mpa |
Elongation δ % |
hardness HBW |
Impact absorbed energy KV2 J |
Reduction of area ψ % |
| steel products; All dimensions | Softening annealing (G) | ≤207 | |||||
| steel products;d≤16 | Tempering | 700~850 | ≥500 | ≥14 | ≥35 | ISO-V ≥25 |
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| steel products;16 | Tempering | 650~800 | ≥430 | ≥16 | ≥40 | ≥25 | |
| steel products;40 | Tempering | 630~780 | ≥370 | ≥17 | ≥45 | ≥25 | |
| Bar;16 | Normalized (N) | 590~740 | ≥335 | ≥17 | |||
| Flat steel;d≤16 | Normalized (N) | 580~770 | ≥340 | portrait ≥17 |
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| Flat steel;16 | Normalized (N) | 580~770 | ≥305 | ≥17 | |||
| Flat steel;100 | Normalized (N) | 560~750 | ≥275 | ≥15 |
| Main characteristics | Application examples | |
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The most commonly used medium-carbon quenched and tempered steel has good comprehensive mechanical properties, low hardenability,
and is prone to crack during water quenching. Small parts should be quenched and tempered, and large parts should be normalized |
It is mainly used to manufacture moving parts with high strength, such as turbine impeller and compressor piston. Shaft, gear,
rack, worm, etc. Pay attention to preheating before welding and stress relief annealing after welding |
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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
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