Stainless Steel Alloy 630

Type 630, or 17-4, is the most prevalent PH stainless steel. Type 630 is a martensitic stainless steel with exceptional resistance to corrosion. It is magnetic, rapidly weldable, and has good fabrication qualities, albeit its tensile strength decreases at elevated temperatures. It is well-known for its resistance to stress-corrosion cracking and is utilized in numerous industries and applications, such as:

Controls and gears

Oil field equipment

Propeller shafts

Pump shafts

Valve spindles

Aircraft and turbine engines

Nuclear power plants

Paper mills

Chemical processing apparatus

To qualify for sale as Type 630 Stainless Steel, the material must possess a specific chemical composition that includes:

Cr 15-17.5%

Ni 3-5%

Mn 1%

Si 1% 

sP 0.040%

S 0.03%

Cu 3-5% 

Nb+Ta 0.15-0.45%

SSM offers Type 630 Stainless Steel in a variety of forms, including round bar. As with all of Continental Steel's products, our Type 630 Stainless Steel fulfills essential industry standards such as ASTM 564.