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Lork S30403/ISO X7CrNi18-9/SUH304H Heat Resistant Steel Sheet for Petroleum Refineries 304H Stainless SteelUnlike 304L, Type 304H has a higher carbon content making the steel 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.
The material is recommended for use in ASME pressure vessels in working service above 525 °C due to the grade's heat resistant properties.
Stainless Steel 304H Applications
Some examples of applications that grade 304H is commonly used for includes:
304H is an austenitic stainless steel, which has 18-19% chromium and 8-11% nickel with a maximum of 0.08% carbon. 304H stainless steel pipes are the most versatile and widely used pipes in the stainless steel family. They exhibit excellent corrosion resistance, tremendous strength, high ease of fabrication, and outstanding formability. Hence, are used for a wide variety of home and commercial applications. 304H stainless steel has a controlled carbon content of 0.04 to 0.10. This provides enhanced high temperature strength, even above 800o F. Compared to 304L, 304H stainless steel pipes have greater short term and long term creep strength. Also, they are more resistant to sensitization than 304L.
Mentioned below are the key characteristics of 304H stainless steel pipes offered by Arch City Steel & Alloy:
Suitable for high temperature applications, as it offers higher strength at temperatures above 500° C and up to 800° C
Grade 304H offers good oxidation resistance in intermittent service to 870° C and in continuous service to 920° C
Becomes sensitized in the temperature range of 425-860° C; hence not recommended if aqueous corrosion resistance is required.
Good resistance to corrosion in oxidizing environments, and moderately aggressive organic acids due to the presence of chromium and nickel respectively
Performs uniformly in most corrosive environments
May show lower corrosion rate compared to higher carbon grade 304.
Readily welded by most standard processes.
May be required to anneal after welding
Annealing assists in restoring the corrosion resistance lost by sensitization.
Best results are achieved at slower speed, good lubrication, heavier feeds, and sharp tooling
Subject to work hardening and chip breaking during deformation.
| Typical Chemical Composition % (max values, unless noted) | ||||||||
| Grade | Cr | Ni | C | Si | Mn | P | S | N |
| 304H | min: 18.0 max:20.0 |
min: 8.0 max: 10.5 |
min: 0.04 max:0.10 |
0.75 max |
2.0 max |
0.045 max |
0.03 max |
0.10 max |
| Typical Room Temperature Mechanical Properties | |||||
| Grade | Tensile Strength KSI (min.) | Yield Strength 0.2% KSI offset KSI (min.) | Elongation (% in 2(50.8 mm) | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
| 304H | 75 | 30 | 40 | 201 | 92 |
Available Sizes And Specifications
| 304H stainless steel profile sizes and specifications | |
| Grade | 304H |
| Specification | EN, DIN, JIS, ASTM, BS, ASME, AISI, ISO |
| Standard | ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 . |
| Stainless steel round Bar | Diameter: 2mm - 600mm |
| Stainless steel bright Bar | Diameter: 2mm - 600mm |
| Stainless steel hex Bar | Dimension: 6mm - 80mm |
| Stainless steel square bar | Dimension: 3.0 - 180mm |
| Stainless steel flat bar | Thickness: 0.5mm - 200mm, Width: 1.5mm - 250 mm |
| Stainless steel angle bar | as requirements |
| Length | Normally 6m, or produce as requirements |
| Surface | Black, Bright. Peeled and Polished, Solution annealed. |
| Delivery condition | cold drawn, hot rolled, forged, grinding, centerless grinding |
| Tolerance | H8, H9, H10, H11, H12, H13,K9, K10, K11, K12 or as per clients' requirements |
Q1: Do you accept the trial order ?
A1: Yes,if we have the exactly size in stock.we can delivery even 1 piece/meter .
Q2: Can I have free sample before making orders?
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