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CM690 hot rolled steel round bars
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CM690 hot rolled steel round bars
CM690 hot rolled steel round bars information
CM690 grade, What's the Chemical Composition of GB CM690 GB/T 18669? Chemical Composition of CM690 Steel, CM690 steel properties, CM690 carbon Steel, GB steel plate Supplier in Japan, GB steel sheet Exporter, GB steel Price, GB Equivalent steel, GB steel supplier in China, GB steel Chinese equivalent grade, GB CM690 GB/T 18669 steel Specifications
Chemical and Mechanical
Yield strength is the yield limit of GB CM690 GB/T 18669 when yielding occurs, that is, the stress resisting micro-plastic deformation. The external force greater than the yield strength will make the GB CM690 GB/T 18669 parts permanent failure and unable to recover. Less than this, the GB CM690 GB/T 18669 parts will return to their original shape.
Tensile strength is the critical value of transition from uniform plastic deformation to locally concentrated plastic deformation. It is also the maximum load-carrying capacity of GB CM690 GB/T 18669 under static tension. Tensile strength is the resistance that characterizes the maximum uniform plastic deformation of GB CM690 GB/T 18669. The deformation of tensile specimens is uniform before they bear the maximum tensile stress, but beyond that, the GB CM690 GB/T 18669 begins to neck, i.e. concentrate deformation.
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 812 (≥) | 174 (≥) | 22 | 32 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 344 |
Product parameters
GB CM690 GB/T 18669 Physical
Physical properties of GB CM690 GB/T 18669 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson’s coefficient, ν |
|---|---|---|---|---|---|---|---|
| 31 | - | - | 0.41 | - | |||
| 834 | 386 | - | 24.3 | 231 | - | ||
| 671 | - | 43 | 14.2 | 244 | 213 |
Factory video
Shandong Mingding Supply Chain Management Service Co., Ltd. was established in 2013, focusing on the production, processing and trade of metal materials. We have a professional team to provide quality service, we sincerely welcome customers at home and abroad to visit our company for guidance and long-term cooperation.
Warehouse storage
The company has the most advanced production equipment and automatic control system, to ensure the most reliable product quality. In addition, we also have a professional international trade and logistics team. With quality products and excellent service, we have established a large number of long-term customers all over the world.
Packing and delivery
To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.
Production Technology
Our main products include high quality carbon steel, stainless steel products,galvanized steel products, aluminum and copper. We can also provide cutting, punching, bending, polishing, shearing, wire drawing and other related service.
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Application
Our company is set production processing and trade as one. The company has the most advanced production equipment and automatic control system, to ensure reliable product quality and sufficient supply capacity. Our main products are stainless steel, silicon steel, galvanized steel, carbon steel, aluminum products and other series. Applicable to engineering, coal mining, shipping, aviation, boiler, machinery, military and other fields. We sincerely welcome customers from all over the world to visit our company to discuss long-term cooperation.
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FAQ
How do you package the product?
The inner layer is covered with waterproof paper, packed in iron and secured by fumigated wooden brackets. It can effectively protect products from corrosion in the process of sea sample transportation.
Are the products inspected before shipment?
Of course. All our products go through strict quality tests before they are packed. Those that fail will be destroyed.
Can I visit your factory?
Of course. We welcome customers from all over the world to visit our factory.
What certifications have your products passed?
We have ISO 9001, SGS, EWC and other certifications.
Can you provide samples?
Of course, we can send samples all over the world. Our samples are free of charge, but the customer needs to bear the Courier charge
What is the loading port?
Normally, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. You can choose other ports according to your needs.
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Add：Shan Gang Building, 61-11 South Gongye Road, Jinan Area, China (Shandong) Pilot Free Trade Zone
MD Steel
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info@mingdingsteel.com
+8615553113555