JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
| Payment Terms | L/C,T/T,Western Union,MoneyGram |
| Supply Ability | 600 Tons per year |
| Delivery Time | 7 days |
| Packaging Details | Export Packing |
| OD | 6-600MM |
| Surface | Black and Bright |
| Type | Hot Rolled and Cold Drawn |
| Condition | Heat Treatments |
| Length | 3-12m |
| Brand Name | Mittel |
| Model Number | 18Crnimo7-6 Equivalent 1.6587 18NCD6 |
| Certification | SGS MTC ISO |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T,Western Union,MoneyGram | Supply Ability | 600 Tons per year |
| Delivery Time | 7 days | Packaging Details | Export Packing |
| OD | 6-600MM | Surface | Black and Bright |
| Type | Hot Rolled and Cold Drawn | Condition | Heat Treatments |
| Length | 3-12m | Brand Name | Mittel |
| Model Number | 18Crnimo7-6 Equivalent 1.6587 18NCD6 | Certification | SGS MTC ISO |
| Place of Origin | China | ||
| High Light | Hot Rolled 18Crnimo7-6 alloy steel round bar ，1.6587 18NCD6 steel round bar with warranty ，105MM soft annealed alloy steel bar | ||
The failure cause of the 18CrNi3Mo steel for drilling bit, including inclusions, prior austenite grain size, carburized layers, and morphology of the fatigue fracture, was investigated by optical microscope, quantitative metallography, and scanning electron microscope. Results show that the failure of the drill bit is not related to interior inclusions or the inhomogeneity of the prior austenite grain size distribution. The failure is related to geometrical discontinuities causing stress concentration along the tooth profiles while under effect of continuous twisting and axial impact. Thus, the crack initiates in these areas, and the microstructures of the carburized layer, the transitive layer, and the matrix are all tempered martensite such that the crack propagation cannot be effectively restrained and the crack propagates quickly, causing premature failure of the drilling bit.
18CrNi3Mo steel Failure analysis Fracture Fatigue crack
| Grade : | 18CrNiMo7-6 | |
| Number: | 1.6587 | |
| Classification: | Alloy special steel | |
| Standard: |
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| Equivalent grades: | Go here |
Chemical composition % of steel 18CrNiMo7-6 (1.6587): EN 10084-2008
| Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. Steels with improved machinability as a result of the addition of lead or higher sulfur contents, depending on the manufacturing process up to around 0.1 % S, may be supplied on request. In this case, the upper limit of the manganese content may be increased by 0.15 % |
| C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.15 - 0.21 | max 0.4 | 0.5 - 0.9 | 1.4 - 1.7 | max 0.025 | max 0.035 | 1.5 - 1.8 | 0.25 - 0.35 |
Mechanical properties of steel 18CrNiMo7-6 (1.6587)
| Nominal thickness (mm): | to 16 |
| Rm - Tensile strength (MPa) hardening and tempering at 200 | 1200 |
| Brinell hardness (HBW): (+S) | 255 |
| Brinell hardness (HBW): (+A) | 229 |
| Brinell hardness (HBW): (+TH) | 179 - 229 |
| Brinell hardness (HBW): (+FP) | 159 - 207 |
Equivalent grades of steel 18CrNiMo7-6 (1.6587)
Warning! Only for reference
| EU EN |
Germany DIN,WNr |
France AFNOR |
England BS |
Italy UNI |
China GB |
Finland SFS |
Inter ISO |
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NEW opportunities for buyers!
Post free buying requirement of steel 18CrNiMo7-6 (1.6587)
Mechanical properties
| ReH | Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d elasticite minimale |
| Rm | Tensile strength / Zugfestigkeit / Resistance a la traction |
| A | Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal |
| J | Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc |
Heat treatment conditions
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Alloy special steel |
FAQ
1) why you chose us ?
Because we have large stocks and we have long term cooperative factories. We can get the lowest ex-factory prices. The price are quite reasonable and it is lower than our commercial peers. Also, we can guarantee the quality of our products.
2) Our minimum order quantity:
15 Metric Tons
3) How about the Delivery Time?
The steel pipe will be produced since we getting your deposit by T/T or original L/C, and delivery to the port of loading within 25~30 days.
For normal size, some stocks in our factory now, we can shipment within 7~10 days after receive the deposit.
4) What kind of payment does your company support?
T/T, 100% L/C at sight.
5) Do you charge for the samples?
No, we provide samples free, you pay for the freight charge.
6) Main market:
Mid East South America South Asia Africa Southeast Asia Northern Europe Western Europe etc.
If you are interested in our products, please contact with me freely !
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Exporter,Seller
Year Established:
1998
Total Annual:
80Millen-100 Millen
Employee Number:
200~500
Ecer Certification：
Verified Supplier
Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transporta... Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transporta...
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