Grade SUS 630 plates are martensitic stainless steels that are precipitation hardened to achieve excellent mechanical properties. These steel achieve high strength and hardness following heat treatment. The heat and corrosion resistance of grade SUS 630 plate are similar to that of grade 304 steels. This SUS 630 plate is also commonly referred to as grade 17-4PH.
Key Properties
The properties mentioned below pertain to commonly available grade 630 bar products in ASTM A564. The specifications may not be similar to other forms such as forgings and plates.
Grade | C | Mn | Si | P | S | Cr | Ni | Cu | Nb+Ta | |
630 | min. max | - 0.07 | - 1 | - 1 | - 0.04 | - 0.030 | 15 17.5 | 3 5 | 3 5 | 0.15 0.45 |
Mechanical Properties
The table below outlines the mechanical properties of grade 630 stainless steels:
Condition | Tensile Strength (MPa) | Hardness | |
Rockwell C (HR C) | Brinell (HB) | ||
Solution Treated | 1105 typ | 38 max | 363 max |
Condition 900 | 1310 min | 40 min | 388 min |
Condition 1150 | 930 min | 28 min | 277 min |
Grade | Density | Elastic Modulus | Elec Resistivity |
0-100°C | 0-315°C | 0-538°C | |
630 | 7750 | 197 | 18.4 |
Grade Specification Comparison
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
630 | S17400 | - | - | 1.4542 | X5CrNiCuNb16-4 | - | SUS 630 |
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