630 stainless steel is a precipitated, hardened, stainless steel consisting of copper, niobium/coltan. This grade has high strength, hardness (up to 300o C/572o F) and corrosion resistance. 630 stainless steel is a precipitation, quenched, martensitic stainless steel, and this grade has high strength, hardness, and corrosion resistance. After heat treatment, the mechanical properties of the product is more perfect, can reach up to 1100-1300 mpa (160-190 ksi) compressive strength. This grade can not be used above 300 ° C (570 F) or at very low temperatures. It has good corrosion resistance to the atmosphere and dilute acids or salts. It has the same corrosion resistance as 304 and 430.
Chemical Composition
C:≤0.07
Si:≤1.00
Mn:≤1.00
P:≤0.035
Ni:3.00-5.00
Cr:15.0-17.5
Cu:3.00-5.00
Nb:0.15-0.45
Applications,
offshore platforms,
helicopter decks,
other platforms,
food industry,
pulp and paper industry,
Aerospace (turbine blades) mechanical components,
nuclear waste barrel delivery status,generally delivered in heat treatment status, the type of heat treatment shall be specified in the contract; if not, delivery shall be made in accordance with the non-heat treatment condition. Heat treatment process, the heat treatment specifications are as follows: 1)1020-1060 ° C rapid cooling after solid solution treatment; 2)480 ° C aging, 470-490 ° C air cooling after solid solution treatment; 3)550 ° C aging, 540-560 ° C air cooling after solid solution treatment; 4)580 ° C aging, 570-590 ° C air cooling after solid solution treatment; 5)620 ° C aging, 610-630 ° C air cooling after solid solution treatment.
Metallographic structure: the microstructure is characterized by precipitation-hardening. Mechanical properties, the elongation of stainless steel 630 is still very high, and nitrogen content is associated with it. Another characteristic-high work hardening rate. Therefore, the cold-formed parts can be obtained high strength. Applications where this property can be used include pipes and bolts in deeper wells. Stainless steel 630 and ordinary stainless steel, stainless steel 630 low temperature performance is also very good. Stainless steel 630 extrusion impact and fracture resistance is also very high. And only when it is as low as ~ 196 °C will it fall slightly. It can be seen that stainless steel 630 is very good at low temperature.
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