17-4PH bright finish round bar 630 solid rod
Description
This is a high carbon martensitic stainless with moderate corrosion resistance good strength and the ability to obtain and keep excellent hardness HRC 60 and wear resistance.
Applications
Ball bearings and races, gage blocks, molds and dies, cutlery, valve components, knives and measuring instruments and other products with highest hardness and wear resistance.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103x N/mm2]: 200
Density [g/cm3]: 7.67
Thermal conductivity [W/m.K]: 24.2
Electric resistivity [Ohm mm2/m]: 0.60
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6oC-1
| 20-100oC |
20-200oC |
20-300oC |
20-400oC |
20-500oC |
20-600oC |
20-700oC |
| 9.8 |
10.8 |
11.4 |
11.7 |
12.0 |
12.2 |
12.4 |
Continuous Cooling Transformation (CCT) Diagram
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Time-Temperature Transformation (TTT) Diagram
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Soft Annealing
Heat to 820-860oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 269.
Hardening
Harden from a temperature of 1000-1050oC followed by oil or quenching. Hardness after quenching is min. 58 HRC.
Tempering
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC |
200oC |
300oC |
400oC |
500oC |
600oC |
600oC |
| 59 |
57 |
54 |
55 |
55 |
39 |
31 |
Tempering Diagram
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Forging
Pre-heat to 760oC, then bring slowly up to 1038-1204oC before proceeding. Do not work this material below 927oC. Cool material slowly after working and once at room temperature, anneal fully.
Machinability
Best machined in the annealed condition. Tough, stringy chips can be best handled by the use of chip breakers. Carbide or ceramic tooling is recommended.
Cold Working
This alloy is considered only slightly cold workable by common practices.
Corrosion Resistance
Resistant to a wide variety of media including fresh water, steam, petroleum products and alcohol. The material is not recommended to be used in annealed condition as it may get rusty. Correct passivation process recommendation to improve the corrosion resistance in quenched and tempered form. HT recommendation to obtain best corrosion resistance. In this case as per the recommendation that is obtained thru low temperature tempering with mirror finished surface. The 440 steel is not recommended to be used in elevated temperature application i.e above 400oC. Corrosion resistance is reduced when used in elevated temperarure condition.
Welding
This alloy is not commonly welded due to its tendency to air harden. If it must be welded, preheat to 260oC and post weld treat at 732-760oC for 6 hours followed by a slow furnace cooling to avoid cracking. Use similar filler metal.
Company Information
Bozhong Group Mainly supply in forms of coil, sheet, plate, rod, bar, tube, pipe, beam, angle, flange, wire, strip, channel, etc., with various varieties, wide range of dimensions, high purity, stable chemical composition, high dimensional accuracy and excellent surface quality. The products are mainly used in the fields of industries such as automobile engineering, railway transportation, aviation, aerospace, machinery, petrochemical, energy, environmental protection, offshore, chemical, oil & gas, ilitary, power plant, nuclear power, pressure vessel, boiler equipment, mold manufacture, etc.
steel coil
l steel plate
l steel sheet
l steel bar/rod
steel round bar
steel flat bar
steel square bar
l steel pipe/tube ( welded or seamless )
steel round pipes
steel square pipes
steel welded tubes
steel seamless tubes
l steel strip
l steel beam
l steel angle
l steel channel
l steel flange
l Steel wire
Bozhong Group can supply a variety of structural steel, high-strength steel, wear-resistant steel plate, boiler and pressure vessel steel, marine engineering and stainless steel plate in the thick steel and various European standard bars and pipes and profiles.Our global sales and service network throughout all around the world to ensure that the goods reach the customer in the shortest time.
We can follow your drawings and requirements, to provide you with oxygen cutting, plasma cutting and laser cutting and other processing services. You can also perform ultrasonic testing in accordance with EN10160 standard, EN10164 standard test Z15, Z25, Z35, weld bending detection, PWHT detection,etc.
We have ISO9001: 2000 quality management system certification, and obtain the quality certification from all the well-known certification company, including TuV / LRS / GL / CE and so on.
Special steel includes as below:
Boiler and pressure vessel steel
Pipeline steel
Bridge steel
Nuclear power steel
Structural steel
Die steel
High strength steel
Abrasion resistant steel
Weathering, corrosion resistant and fire resistant steel
High rise building steel
Shipbuilding and offshore engineering steel
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material don't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can you provide a sample for our testing before confirm the order?
A: Yes. We can provide sample to you for approval before you place an order to us. Free sample is available if we have stock.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.
Customer Visiting:
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