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Basic Info.
Product Description
1. Cobalt alloys have higher melting points than nickel (or iron) alloys, Which allows them to absorb stress at a higher absolute temperature.
2. Cobalt alloys give superior hot corrosion resistance to gas turbine atmospheres due to their high chromium content.
3. Cobalt alloys show superior thermal fatigue resistance and weldability over nickel alloys.
Typical application
Material Choose Typical Application Process
ST 6 /Steam and chemical valve seat, oil and gas pump sleeve, butterfly valve bushing, hot-dip galvanized production line used bushing etc., investment casting
ST 3 / Pump sleeve, rotary ring , valve seats
ST 12 / Extrusion die, hot impact die and saw teeth.
TS 100 / Extrusion die, hot-impact die and saw teeth.
ST 20 / Pump sleeves, rotary rings, bearing sleeves, valve balls
Another request, please get in touch with our sales.
Chemical compositions and properties (%)
| Brand | C | Mn | Si | Cr | Ni | Mo | W | Co | Fe | P | S | Density (g/cm3) | Hardness (HRC) |
| ST3 | 2.0-2.7 | 1.0 | 1.0 | 29-33 | 3.0 | 11-14 | Bal. | 3.0 | ≤0.03 | ≤0.03 | 8.55 | 51-55 | |
| ST 6 | 0.9-1.4 | 1.0 | 1.5 | 27-31 | 3.0 | 1.5 | 3.5-5.5 | Bal. | 3.0 | ≤0.03 | ≤0.03 | 8.35 | 38-44 |
| ST 12 | 1.1-1.7 | 1.0 | 1.0 | 28-32 | 3.0 | 7.0-9.5 | Bal. | 3.0 | ≤0.03 | ≤0.03 | 8.40 | 44-49 | |
| ST 20 | 2.2-3.0 | 2.0 | 30-34 | 3.0 | 1.0 | 14-18 | Bal. | 3.0 | ≤0.05 | ≤0.05 | 8.65 | 53-59 | |
| Tantung-G 25 | 2.2-2.8 | 1-3 | 27-32 | 7 | Ta/Nb | 14-19 | Bal. | 2-5 | 8.84 | 57-60 | |||
| Tantung-G35 | 3.3-3.8 | 1-3 | 27-32 | 7 | Ta/Nb | 14-19 | Bal. | 2-5 | 8.80 | 60-63 | |||
| Co 400 | 0.04 | 2.5-2.7 | 8-10 | 27-29 | Bal. | 55 | |||||||
| Co 800 | 0.04 | 3.2-3.6 | 16-18 | 27-29 | Bal. | 58 |
Q1: What is the Warranty for our products ?
A1: We own high precision grading machine to control geometry dimensions and apply ultra fine grain size substrate coated with high performance coatings to guarantee the lifetime of our products, which can satisfy every working condition.If any quality problems occur in this period, we will take on the shipping cost and replacement.
Q2: Do you provide free samples?
A2: Yes, usually, we provide free samples for testing under the condition of freight paid by the customer.
Q3: What is your minimum order requirement?
A3: We will indicate the MOQ for each item in the quotation sheet. We accept the sample and trial order. If the quantity of a single item can't reach the MOQ, the price should be a sample price.
Q4: What is the delivery time of your products?
A4: It depends on the inventory availability.If items needed are in stock, the delivery time would be within 8 work days, but if not, the delivery time would be around 20 work days.
Q5: Can you manufacture Special-shaped products?
A5: Yes, we can. We can produce both standard and special products. We can make them according to your drawings and samples.
Q6: May I have my order working schedule?
A6: Yes, we will send the working schedule of your order each week. We will inspect and test all merchandise in case of damaging and missing parts before shipment. Pictures of the detailed inspection of the order will be sent to you for your confirmation before delivery.
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