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Stainless Steel Plate 304H ASTM A240

304H stainless Steel Plate Overview

Unlike 304L, 304H stainless steel plate has a higher carbon content making the stainless steel plate more suitable for use in applications where elevated temperatures are present. It is an austenitic chromium-nickel steel alloy and the greater carbon content delivers an increased tensile and yield strength.

304H stainless steel plate is available for purchase at Penn Stainless Products. It is available in plate mill plates. 304H stainless steel plate is typically stocked in thicknesses between 0.188” and 2.0”. It is available in a wide variety of lengths and widths. For additional sizes and questions regarding 304H stainless steel plate, contact a Penn Stainless team member for assistance.

Physical Properties of 304H Stainless Steel Plate

304H stainless steel plate is composed of between 0.04% and 0.10% carbon. 304H stainless steel plate is also comprised of at most 0.75% silicon, 2.00% manganese and 0.045% phosphorous. Also contained in 304H stainless steel plate is 0.030% sulfur, between 8.00% and 10.5% nickel and no more than 0.10% nitrogen.

Mechanical Properties of 304H Stainless Steel Plate

The addition of the extra carbon in 304H stainless steel plate greatly effects the mechanical properties of 304H stainless steel plate. The tensile strength of grade 304H stainless steel plate is 74.69 ksi. The yield strength of 304H stainless steel plate at 0.2% is 29.73 ksi. 304H stainless steel plate has an elongation of 40%. On the Brinell hardens scale, 304H stainless steel plate has a hardness of 201 and on the Rockwell B scale, it has a hardness of 92.

Physical Properties of 304H Stainless Steel Plate

304H stainless steel plate has a density of 0.285 lbm/in^3 at 68℉. The coefficient of thermal expansion of 304H stainless steel plate between 68℉ and 212℉ is 9.2 min/in. Between 68℉ and 1,600℉ the coefficient of thermal expansion is 11.0 min/in. 304H stainless steel plate has a thermal conductivity of 9.4 BTU/hr-ft at 212℉ and a 932℉ the thermal conductivity is 12.4 BTU/hr-ft. The specific heat of 304H stainless steel plate is 0.12 BTU/lbm between 32℉ and 212℉.

Specifications of 304H Stainless Steel Plate

304H STAINLESS STEEL PLATE
ASTM A240
ASME 240
AMS 5513
UNS S30409

304H Stainless Steel Plate Applications and Usages

304H Stainless steel plate is commonly found throughout the power generation industry. Its used to produce industrial boilers, pressure valves, steam exhaust, pipelines, cooling towers, heat exchangers, flanges, and condensers. 304H stainless steel plate is also commonly used in the chemical, gas, and oil refining industry. This ability to withstand high temperatures makes 304H stainless steel a useful material in theses environments. Most commonly 304H stainless steel is found in petroleum refining plants.

304H Stainless Steel Plate Processing and Fabrication Options

304H Stainless Steel Plate FAQs

Can 304H stainless steel pate be heat treated?

Heat treating 304 stainless steel will not result in a stronger more durable product.

How much heat resistance does 304H stainless steel plate have?

304H stainless steel plate is suitable for high-temperature applications as it offers higher strength at temperatures between 1,000℉ and 1,500℉.

Why would one pick 304H stainless steel plate over 304 or 304L stainless steel plate?

One benefit of stainless steel plate 304H is that it can withstand higher temperatures than grades 304 and 304L stainless steel plate.

Can 304H stainless steel plate be polished?

Yes, 304H stainless steel can be polished to a wide variety of finishes.

Can stainless steel plate be purchased that meets the requirements of both 304 and 304H stainless steel plate?

Yes, it is possible to purchase dual certified stainless steel plate in grades 304 and 304H.