Stainless

T-304, T304H, T-304L

Stainless Steel T-304, T-304H, T-304L (UNS S30400, S30409, S30403)
  • 18 - 10 Chromium-Nickel austenitic stainless steel
  • Available in most forms - sheets, plates & coils to ASTM A240; bar sections to ASTM A276 & A479
Typical Analysis
T-304
C Mn P S Si Cr Ni N
.08
Max		 2.8
Max		 .045
Max		 .03
Max		 1.0
Max		 18/20 8/10.5 .1 Max
T-304H
C Mn P S Si Cr Ni N
.04/.10 2.0
Max		 .045
Max		 .03
Max		 1.0
Max		 18/20 8/10.5 -
T-304L
C Mn P S Si Cr Ni N
.03
Max		 2.8
Max		 .045
Max		 .03
Max		 .75
Max		 18/20 8/12 .1 Max
Characteristics
  • Perhaps the most versatile and widely used general purpose austenitic stainless steel. It is excellent for forming, drawing and welding, and provides good corrosion resistance without post-weld annealing. The extra low carbon analysis of T-304L, which further restricts carbide precipitation during welding permits the use of this steel in corrosive service in the as-welded condition. T-304L is essential particularly where heavier sections are involved. T-304H is a modification with .04/.10 carbon and no nitrogen content. The mechanical test requirements are the same as T-304 but the 'H' type is not normally subject to intergranular corrosion testing. T-304 cannot be hardened by thermal treatment but it does work harden. It is non-magnetic when annealed. Machinability is approximately 45% - 75 surface feet per minute
Typical Applications
  • These grades are used extensively in the dairy, beverage, brewing, wine and food industries where the highest degree of cleanliness is of prime importance. Chemical equipment and storage tanks, cryogenic vessels, sinks, saucepans and kitchen equipment, architectural trim, petroleum refinery equipment
Corrosion and Heat Resistance
  • T-304 is highly resistant to strong oxidizing acids, such as nitric acid, and resists many organic and inorganic chemicals. Excellent for hot petroleum products. It has good scale resistance up to 900℃ in continuous service and 843℃ for intermittent service. T-304L would be equal and generally superior.
Stainless Steel T-304, T-304H, T-304L (UNS S30400, S30409, S30403)

Stainless Steel T-304, T-304H, T-304L

(UNS S30400, S30409, S30403)- Typical at Room Temperature
Bars T-304 T-304H T-304L
Tensile Strength, psi 85,000 85,000 83,000
Tensile Strength, N/mm² 586 586 572
Yield Strength, psi 35,000 35,000 34,000
Yield Strength, N/mm² 241 241 234
Elongation (%) 60 60 60
Hardness 149 149 146
Stainless Steel T-304, T-304H, T-304L (UNS S30400, S30409, S30403) Mechanical Properties - Sheet
  • Typical at Room Temperature
Sheet T-304 T-304H T-304L
Tensile Strength, psi 84,000 84,000 81,000
Tensile Strength, N/mm² 579 579 558
Yield Strength, psi 42,000 42,000 39,000
Yield Strength, N/mm² 290 290 270
Elongation (%) 55 55 55
Hardness 146 (80) 146 (80) 143 (79)
Stainless Steel T-304, T-304H, T-304L (UNS S30400, S30409, S30403) Mechanical Properties - Plate
  • Typical at Room Temperature
Plate T-304 T-304H T-304L
Tensile Strength, psi 82,000 82,000 79,000
Tensile Strength, N/mm² 565 565 545
Yield Strength, psi 35,000 35,000 33,000
Yield Strength, N/mm² 241 241 228
Elongation (%) 60 60 60
Hardness 149 (81) 149 (81) 143 (79)

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