|Place of Origin:||CHINA|
|Minimum Order Quantity:||500 kgs|
|Price:||2500 - 3000 USD/Ton|
|Packaging Details:||export packing or as cilents request|
|Delivery Time:||10 - 14 days|
|Payment Terms:||30% TT inadvance , 70% TT balance against copy of B/L|
|Supply Ability:||20 Ton/Month|
17-4PH / 630 Stainless Steel Grinding Rod SS Round Bar Polished H7 H9 Tolerance
|Product name||630 stainless steel grinding round bar|
|Payment terms||30% TT inadvance and 70% TT balance against copy of B/L|
|Packing||Standard Seaworthy Package|
|MTC||can be offered|
|Delivery time||7-15 dyas,or according to the order quantity or upon negotiation|
|Place of origin||Shanghai, China(mainland)|
Packing Detail information
Export standard package,bundled or be required.
The inner size of container is below:
|Delivery Details||7-15 dyas,or according to the order quantity or upon negotiation|
|Loading||25 Tons full 20ft and 40ft container|
grade 630 stainless steels are displayed below:
Grade 630 stainless steels:
|Condition||Tensile Strength (MPa)||Yield Strength 0.2% Proof (MPa)||Elongation (% in 50mm)||Hardness|
|Rockwell C (HR C)||Brinell (HB)|
|Solution Treated||1105 typ||1000 typ||15 typ||38 max||363 max|
|Condition 900||1310 min||1170 min||10 min||40 min||388 min|
|Condition 1150||930 min||724 min||16 min||28 min||277 min|
The physical properties of grade 630 stainless steels
|Mean Co-eff of Thermal Expansion (µm/m/°C)||Thermal Conductivity
|Specific Heat 0-100°C
|0-100°C||0-315°C||0-538°C||At 100°C||At 500°C|
Grade specifications of 630 stainless steels
Possible alternative grades to 630 stainless steels:
|Grade||Reasons for choosing 17/4PH (630)|
|431||431 Has higher toughness than 17/4PH. Better availability in some sizes.|
|416||Free-machining martensitic stainless steel - better for repetition machining. Lower cost.|
|316||Higher corrosion resistance of 316 to resist more severe environments, but with much lower strength than 17/4PH.|
|2205||Much better corrosion resistance than 17/4PH, with a lower strength (but not as low as 316).|
Grade 630 stainless steels have good corrosion resistance in many environments. They exhibit improved resistance against stress corrosion cracking, if aged at 550°C or more. However, grade 630 steels are less resistant to solution treated Condition A, and hence these steels, even with considerable hardness, should not be used in this condition.
Grade 630 stainless steels have good resistance to oxidation. However, long-time exposure of grade 630 to temperatures of 370 to 480°C should be avoided, to prevent loss of toughness at ambient temperature. These grades should not be used at temperatures above age-hardening temperature, to avoid reduction of hardness and mechanical properties of the metal.
Solution treatment (Condition A) — Grade 630 stainless steels are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections of these grades can be oil quenched.
Hardening — Grade 630 stainless steels are age-hardened at low temperatures to achieve the required mechanical properties. During the process, superficial discoloration occurs followed by shrinkage at 0.10% for condition H1150, and 0.05% for condition H900.
The table below shows the typical mechanical properties of grade 630 steels after solution treatment and age hardening:
Typical mechanical properties of grade 630 steels achieved after solution treating
|Cond.||Hardening||Typical Hardness Rockwell C||Tensile Strength (MPa)|
|Temp (°C)||Time (h)|
Grade 630 stainless steels can be machined in their solution-treated condition. They have machining rates similar to that of grade 304 steels.
Some of the major applications of grade 630 stainless steels include:
17-4 is used where high strength and good corrosion resistance are required, as well as for applications requiring high fatigue strength, good resistance to galling, seizing and stress corrosion. Suitable for intricate parts requiring extensive machining and welding, and/or where distortion in conventional heat treatment is a problem. The corrosion resistance of 17-4 is superior to that of hardenable straight chromium grades such as 416. It approaches the corrosion resistance of the non-magnetic chromium-nickel grades. Corrosion resisting properties will be affected by such conditions as surface finish and aging heat treatment. Common applications include uses in aircraft and gas turbines, nuclear reactors, paper mills, oil field industry, and chemical process components.
|Products:||Stainless Steel Grinding Round Bar||Diameter:||12 - 100mm|
|Length:||Within 6m||Finish Tolerance:||H7 H9|
|Other Grade:||200/300/400 Series||Other Shape:||Square / Flat / Heaxgon|