New high-strength, corrosion-resistant alloys for marine corrosion, fastener and boat shaft applications

2012 ◽  
Author(s):  
Edward Hibner ◽  
Pete Jones
Keyword(s):  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Yield Strength ◽  
Cold Work ◽  
High Strength ◽  
Age Hardening ◽  
Marine Corrosion ◽  
Corrosion Resistant ◽  
Excellent Corrosion Resistance ◽  
Cold Worked

High strength and corrosion resistant nickel alloys Hastelloy C-86 ® (UNS N06686) and Hastelloy C-22HS ® (UNS N07022) are currently being evaluated and/ or used by the Navy for current and future bolting applications where both high strength, toughness, ductility along with excellent resistance to corrosion and hydrogen embrittlement are required. This includes present and new ship design. The 686 alloy is currently into final stages of data gathering and mil spec preparation. Alloy 686 is a solid solution nickel base alloy obtaining it’s strength through cold work. The C-22HS alloy was recently introduced for applications requiring both corrosion resistance and high strength. Being a C-type alloy (Ni-Cr-Mo), C- 22HS has excellent corrosion resistance in both reducing and oxidizing environments. The alloy is capable of being age-hardened to effectively double the yield strength over other Ctype alloys. The C-22HS alloy has generated interest in the oil & gas industry due to its resistance to sour brine environments. C-22HS is being included in NACE MR0175/ISO 15156 at NACE Level VII (highest severity), exhibiting resistance to severe sour brine environments. Properties of the new alloy relevant to marine corrosion and Navy fastener applications are presented. This material has also been shown to be resistant to hydrogen embrittlement in marine and other severe environments, exhibiting potential for corrosion immunity. Efforts in developing alternate processing routes for C-22HS alloy for very high strength applications are detailed. The high strength of C-22HS alloy is imparted through the formation of Long Range Ordering (LRO) domains of Ni2(Cr, Mo) which develop during a two-step age-hardening treatment. In standard C-22HS alloy, the formation of the LRO domains nearly doubling of the room temperature yield strength up to values around 100 ksi. The yield strengths of the as-cold worked bars ranged from 191 to 205 ksi (1317 to 1413 MPa), and the cold-worked + age-hardened bars ranged from 199 to 206 ksi (1372 to 1420 MPa). In these material conditions, C-22HS also exhibits excellent ductility and fracture toughness of _150 ft-lbs (_203 J) from -300ºF to +550ºF (-149 to 288°C). The C - 22HS alloy is presently being tested for Navy Subsafe high strength fastener approval. An important feature of the C-22HS alloy in the age-hardened condition is that the alloy retains excellent corrosion resistance. Both alloys C-86 and C-22HS have excellent potential for all marine and military applications where excellent strength, toughness and corrosion resistance are required. In addition to the nickel alloy just discussed, NITRONIC® 50HS (UNS S20910) Stainless Steel provides a combination of corrosion resistance and strength not found in any other commercial material available in its price range. As a result, the use of this alloy for boat shafting is significantly increasing for commercial and naval shipping. Superior corrosion resistance, high yield strength, exceptionally low magnetic permeability and outstanding cryogenic properties define this alloy usefulness for boat shafting.

PHOSNIC BRONZE

Alloy Digest ◽  
1965 ◽  
Vol 14 (2) ◽  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Excellent Corrosion Resistance ◽  
Endurance Strength ◽  
Prolonged Stress ◽  
Hardening Heat Treatment

Abstract CHASE PHOSNIC BRONZE is a high copper alloy combining high strength and high conductivity, both electrical and thermal, in an unusual degree. It has high workability and excellent corrosion resistance. The additions of nickel and phosphorus to the copper render the alloy capable of being hardened and strengthened by age-hardening heat treatment. The alloy has also high endurance strength in the harder drawn tempers of wire, and excellent resistance to creep or flow under the influence of prolonged stress. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-12. Producer or source: Chase Brass & Copper Company Inc.. Originally published November 1953, revised February 1965.

NICKELVAC 925 ALLOY

Alloy Digest ◽  
2003 ◽  
Vol 52 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Excellent Corrosion Resistance

Abstract Nickelvac 925 is an alloy similar to alloy 825 (N08825), but with the age-hardening constituents of titanium and aluminum to achieve high strength while maintaining excellent corrosion resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-601. Producer or source: Allvac Metals Company.

NICKELVAC K-500

Alloy Digest ◽  
2002 ◽  
Vol 51 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Chloride Ion ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Alloying Additions ◽  
Excellent Corrosion Resistance ◽  
Nickel Copper ◽  
Extensive Range ◽  
Very High

Abstract Nickelvac K-500 is a nickel-copper alloy with age-hardening properties imparted by alloying additions of aluminum and titanium. The alloy is characterized by excellent corrosion resistance in an extensive range of natural and chemical environments, excellent resistance to chloride-ion stress-corrosion cracking, and very high strength and hardness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-595. Producer or source: Allvac Metals Company.

LANGALLOY K-500

Alloy Digest ◽  
2007 ◽  
Vol 56 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Copper Alloy ◽  
Sea Water ◽  
High Strength ◽  
Age Hardening ◽  
Good Resistance ◽  
Alloying Additions ◽  
Excellent Corrosion Resistance ◽  
Nickel Copper ◽  
High Fatigue

Abstract Langalloy K-500 is a nickel-copper alloy with both aluminum and titanium additions for age hardening. The additions give the alloy high strength and hardness. The alloy has excellent corrosion resistance along with resistance to chloride stress corrosion, high fatigue resistance in sea water, and good resistance to impingement attack. The alloying additions give it a low magnetic permeability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming and machining. Filing Code: Ni-653. Producer or source: Langley Alloys.

CARPENTER CUSTOM 630

Alloy Digest ◽  
2000 ◽  
Vol 49 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Strength ◽  
Heat Treating ◽  
Temperature Treatment ◽  
Single Step ◽  
Age Hardening ◽  
Low Temperature Treatment ◽  
Temperature Performance ◽  
Excellent Corrosion Resistance

Abstract Carpenter Custom 630 is a martensitic precipitation (age) hardening (PH) stainless steel offering high strength and hardness along with excellent corrosion resistance. It has good fabricating characteristics and can be age hardened by a single-step, low-temperature treatment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-258. Producer or source: Carpenter. Originally published August 1971, revised December 2000.

CRUCIBLE XM 19 STAINLESS

Alloy Digest ◽  
1982 ◽  
Vol 31 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Cold Work ◽  
High Strength ◽  
Heat Treating ◽  
Low Carbon ◽  
Good Corrosion Resistance ◽  
Temperature Performance ◽  
Aisi Type ◽  
Cold Worked

Abstract CRUCIBLE XM 19 Stainless is a nitrogen-strengthened, low-carbon austenitic stainless steel that provides good corrosion resistance in combination with high strength. The alloy has better corrosion resistance than AISI Type 316 with approximately twice the yield strength. It can be welded, machined and cold worked using the same equipment and methods used for the conventional AISI 300 series stainless steels. It is nonmagnetic as annealed and after severe cold work. Its many uses include cables, fasteners, pumps, valves, marine hardware and springs. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-414. Producer or source: Crucible Specialty Metals Division, Colt Industries.

CUNIP

Alloy Digest ◽  
1979 ◽  
Vol 28 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Electron Tube ◽  
Copper Nickel ◽  
Cold Worked ◽  
Thermal Conductivities ◽  
Electrical Connectors

Abstract CUNIP is a copper-nickel-phosphorus age-hardenable alloy which combines high strength with good electrical and thermal conductivities. It may be cold worked either before or after age hardening. Its many uses include electron-tube components, fuse springs and electrical connectors. This datasheet provides information on composition and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-376. Producer or source: Handy & Harman.

Limits of Substitution of Titanium for Tantalum In Corrosion Resistant Alloys

CORROSION ◽  
1962 ◽  
Vol 18 (6) ◽  
pp. 205t-210t ◽  
Author(s):  
C. R. BISHOP ◽  
R. L. POWELL
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Titanium Alloys ◽  
Noble Metals ◽  
Cold Work ◽  
Titanium Content ◽  
Corrosion Resistant

Abstract Tantalum alloys containing up to about 50. percent titanium retain much of the superlative corrosion resistance of tantalum. For some environments, columbium may be substituted for a portion of the tantalum. Under more severe conditions, titanium content below 30 percent appears advisable, from the standpoint of both corrosion resistance and hydrogen embrittlement. Contacting or alloying the tantalum-titanium materials with noble metals greatly decreases the latter type of attack. Tantalum-titanium alloys cost less than tantalum because titanium is cheaper than tantalum and because the alloys are appreciably lower in density. These alloys are amenable to hot and cold work, and appear to have sufficient ductility to allow fabrication. In general, maximum ductility is obtained after heat treatment at 900 to 1000 C. 6.3.13, 6.3.15, 3.7.2

BERYLCO CR-1

Alloy Digest ◽  
1956 ◽  
Vol 5 (9) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Surface Treatment ◽  
Nickel Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Corrosion Resistant ◽  
Hardening Heat Treatment

Abstract BERYLCO CR-1 is a high strength, corrosion resistant beryllium-nickel alloy which responds readily to an age-hardening heat treatment. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Ni-27. Producer or source: Beryllium Corporation.

REPUBLIC RSM-300

Alloy Digest ◽  
1969 ◽  
Vol 18 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Yield Strength ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Extrusion Dies ◽  
Temperature Performance ◽  
Nickel Cobalt

Abstract Republic RSM-300 alloy is an 18% nickel-cobalt-molybdenum age-hardening steel designed to develop up to 300,000 psi yield strength with good toughness. It is recommended for landing gears extrusion dies, rocket motor cases, high-strength bolts, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: SA-242. Producer or source: Republic Steel Corporation.

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