| 3/16" | 1/4" | 5/16" | 3/8" | 1/2" | 5/8" |
|---|---|---|---|---|---|
| 4.8mm | 6.3mm | 7.9mm | 9.5mm | 12.7mm | 15.9mm |
| 3/4" | 1" | 1 1/4" | 1 1/2" | 1 3/4" | 2" |
| 19mm | 25.4mm | 31.8mm | 38.1mm | 44.5mm | 50.8mm |
General Properties
SSC-6MO (UNS N08367) is a superaustenitic 6% molybdenum alloy that exhibits far greater resistance to chloride pitting, crevice corrosion and stress-corrosion cracking than the standard 300 series and standard duplex stainless steels. It also serves as a cost-effective substitute for more expensive nickel-base alloys in applications where excellent corrosion resistance, strength, formability and weldability are essential. Designated as (UNS N08367), SSC-6MO competes directly with Alloy AL6XN?.
The high nickel (24%) and molybdenum (6.5%) contents contribute to the alloys chloride stress-corrosion cracking resistance, while the molybdenum content also provides resistance to chloride pitting. The high levels of chromium (21%), molybdenum and nitrogen (0.22%) all serve to produce exceptional corrosion resistance.
Due to its high nitrogen content, SSC-6MO has higher tensile strength than the common austenitic stainless steels. The ASME design-stress allowances for SSC-6MO are up to 75% higher than 316L and more than two times those of the copper- nickel alloys.
The toughness and ductility of SSC-6MO provide for ease of fabrication. SSC-6MO welds and forms much more readily than any super duplex or high alloy ferritic stainless steel with comparable corrosion resistance.
Design Stress Allowances
One of the advantages of nitrogen-enriched stainless steels such as SSC-6MO and duplex alloys is their higher strength levels in comparison to conventional austenitic stainless steels. Higher strength levels, coupled with the corrosion resistance of SSC-6MO, allows for construction of units with thinner cross-sections. SSC-6MO is rated for stresses over 66% higher than 316L at 200°F. It also maintains its strength at high temperatures. SSC-6MO is readily fabricated using standard practices for austenitic stainless steels.
