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321H Stainless Steel Pipe and Tube

321H grade stainless steel is the higher carbon version of grade 321. It possesses enhanced creep resistance and higher strength at temperatures above 10,00oF (537°C). Usually, the plate’s carbon content allows dual certification.

Specifications: UNS S32109, ASTM A240, ASME SA240, AMS 5510

Applications:

  • Aerospace
  • Chemical Processing
  • Expansion Joints
  • Food Processing
  • Petroleum Refining
  • Waste Treatment
  • Pharmaceutical Production

321H Stainless Chemical Properties:

Grade C Mn Si P Cr Ni S N Ti Fe
321H 0.04 min-0.10 max 2.00 max 0.75 max 0.045 max 17.00-19.00 9.00-12.00 .030 max .010 max 4x(carbon +nigrogen) min-0.70 max Balance

321H Stainless Mechanical Properties:

Grade Tensile Strength ksi (min) Yield Strength 0.2% ksi (min) Elongation %
321H 75 30 40

321H Stainless Physical Properties:

Density
lb/in3		 Thermal Conductivity
(BTU/hr/ft2/f/°F)		 Electrical
Resistivity
(microhm-in)		 Modulus of
Elasticity
(ksi x 10^6)
 Coefficient of
Thermal Expansion
(in/in)/
°F x 10-6		 Specific Heat
(BTU/lb/
°F)		 Melting
Range
(°F)
 .286 9.3 at 200°F 72 at 20°F 28 9.20 at 32 – 212°F 0.1200 at 32°F to 212°F 2550-2635

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