header_materials  Triad Bellows coil and sheet inventory for bellows manufacturing
Triad Bellows coil and sheet inventory for bellows manufacturing

Alloys Used in Bellows and Light Accessories Forming

ASTM A240 T-321
  • Heat resistant alloy for bellows limited to 1200º F
  • Titanium stabilized grade of 300 series stainless steel
  • Optimum resistance to inter-granular corrosion and stress corrosion cracking
ASTM A240 T-304/304L
  • Relatively good heat resistant alloy rated to 1000ºF
  • Offered in dual certification
  • Used particularly for accessories on expansion joints
ASTM A240 T-316/316L
  • Applied to temperatures up to 1000ºF
  • Offered in dual certification
  • Provides excellent corrosion resistance
  • Alloy stabilized with molybdenum
ASTM A240 T-310
  • Temperature range up to 1500ºF
  • Austenitic heat resistance alloy
  • Excellent resistance to oxidation
  • Limited availability in bellows material thickness
ASTM B-536 ALLOY 330
  • Recommended up to 1500ºF
  • High nickel alloy
  • Combination of strength and resistance to carburization
  • Resistant to oxidation and thermal shock

ASTM B-168 ALLOY 600
Inconel 600

  • Operates at elevated temperatures up to 1200ºF
  • High nickel alloy with great carburization and oxidation resistance
  • Resistant to chlorides, dry and gaseous at elevated temperatures
  • Not recommended for use in extreme heat where sulfur is present

ASTM B-443 ALLOY 625
Inconel 625

  • Temperature resistant up to 1200ºF
  • High nickel alloy with outstanding strength
  • Aqueous corrosion resistance due to content of molybdenum and columbium
ASTM B-435 ALLOY X
Hastelloy X
  • Recommended for temperatures up to 1500ºF
  • High nickel alloy grade with excellent strength
  • Oxidation resistant

ASTM B-575 ALLOY C-276
Hastelloy C-276

  • Temperature limited to 1200ºF
  • High nickel molybdenum and chromium alloy with traces of tungsten
  • Excellent resistance to pitting and stress corrosion cracking
  • Used for heat exchangers, ducting and marine applications

Alloys Used for Hardware with Expansion Joint Manufacturing

ASTM A-36 Carbon based steel plate used for plate flanges, tie rod ears, and gussets in temperatures up to 750ºF
ASTM A-516 GR.70 Stronger alloy steel plate with better properties than A-36 plate
flanges and hardware up to 1000ºF

ASTM A-240
T-304, T-316, T-321

Stainless steel plate used for special plate flanges, gimbal
hardware, etc. up to 1000ºF
ASTM A-53-E GR.B Carbon based steel pipe, welded and spot radiograph checked on the seam weld rated to 750ºF
ASTM A106 GR.B Higher grade carbon steel pipe, seamless provides weld efficiency of 100% radiographed seam rated to 750ºF
ASTM A-105 Forged steel RFSO flanges, couplings, temperature and pressure rating varies
ASTM A-234 GR WPB Pipe elbows, concentric reducers, and other non-forged carbon steel fittings
ASTM A182 F GRADES
304/304L, 316/316L
Basic stainless steel forging, covers RFSO flanges couplings, temperature and pressure rating varies
ASTM A-312 GRADES
304/304L, 316/316L
Covers stainless steel pipes and pipe based products with temperatures up to 1000ºF
ASTM A-193 GR B7 Alloy steel threaded rod and bolts used in conjunction with restrained expansion joints
ASTM A-194 GR 2H Alloy steel heavy duty hex nut paired with ASTM A-193 GR B7 threaded rod and bolts
ASTM A-193 GR B8 Certified stainless steel threaded rod used in conjunction with restrained expansion joints
ASTM A-194 GR 8 Certified stainless steel hex nuts paired with ASTM A-193 GR B8 threaded rod and bolts