| Type: | Alloy Steel Bar |
|---|---|
| Standard: | AISI, ASTM, GB, JIS, DIN, BS |
| Technique: | Hot Rolled |
| Application: | Structural Steel Bar, Tool Steel Bar, Die Steel Bar |
| Surface Treatment: | Black/Peeling/Polishing/Machining/Grinding/Turning |
| Alloy: | Alloy |
| Samples: |
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| Customization: |
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Audited Supplier 
Medium carbon quenched and tempered manganese steel has high strength, wear resistance and hardenability. After quenching and tempering, it can obtain good comprehensive mechanical properties and is suitable for oil cooling and high temperature tempering. It is usually used in the quenched and tempered state, and can also be used in the normalized state if necessary. The machinability is acceptable, but the weldability is poor, the cold deformation plasticity is low, the heat treatment has the tendency of temper brittleness and overheating sensitivity, and water cooling is easy to produce cracks. Parts used for manufacturing under high stress and wear conditions are equivalent to 40Cr when used as parts with diameter ≤ 60mm; In automobile, tractor and general machinery manufacturing, it is used for universal joint shaft, axle, connecting rod cap, friction disc, worm, gear, gear shaft, tram and steam locomotive axle, heavy load frame and cold-drawn bolt and nut
| Brand | Chemical composition (mass fraction) (%) | ||||||
| C | Si | Mn | Cr | Ni | Cu | ||
| ≤ | |||||||
| 15Mn | O.12~O.18 | O.17~O.37 | O.70~1.00 | O.25 | O.30 | 0.25 | |
| 20Mn | 0.17~O.23 | O.17~O.37 | O.70~1.00 | O.25 | 0.30 | O.25 | |
| 25Mn | O.22~O.29 | 0.17~0.37 | O.70~1.00 | O.25 | O.30 | O.25 | |
| 30Mn | 0.27~O.34 | O.17~0.37 | 0.70~1.00 | O.25 | O.30 | 0.25 | |
| 35Mn | O.32~O.39 | O.17~O.37 | O.70~1.00 | 0.25 | O.30 | O.25 | |
| 40Mn | O.37~0.44 | O.17~0.37 | O.70~1.00 | 0.25 | 0.30 | O.25 | |
| 45Mn | 0.42~0.50 | 0.17~O.37 | 0.70~1.00 | O.25 | O.30 | O.25 | |
| 50Mn/1053 | O.48~0.56 | O.17~O.37 | O.70~1.00 | 0.25 | 0.30 | 0.25 | |
| 60Mn/1061/1062 | 0.57~0.65 | O.17~O.37 | 0.70~1.00 | 0.25 | 0.30 | 0.25 | |
| 65Mn | 0.62~0.70 | 0.17~O.37 | O.90~1.20 | O.25 | 0.30 | 0.25 | |
| 70Mn | 0.67~O.75 | 0.17~0.37 | 0.90~1.20 | O.25 | O.30 | O.25 | |
| 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... |
| Sample diameter d mm |
Heat treatment or status | tensile strength σb Mpa |
yield point σs Mpa |
Elongation or elongation after fracture δ % |
Reduction of area ψ % |
hardness HBW |
Impact absorbed energy KV2 J |
|
| 50Mn | d=25 | Quenching+tempering | ≥885 | ≥735 | ≥10 | ≥50 | ≤241 | ≥71 |
| 60Mn | d=25 | normalizing | ≥690 | ≥410 | ≥11 | ≥35 |
Unheat-treated steel ≤269 |
- |
|
Annealed steel ≤229 |
- |
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 |
| 20 feet container contains dimension | Length under 6000mm |
| 40 feet container contains dimension | Length under 12000mm |
| By bulk vessel | Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo |
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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