Premium-grade stainless steel 321H square bars and rods that are made to withstand high temperatures and corrosion are available from George Metals, a reputable manufacturer and supplier with headquarters in Houston, USA. Specializing in advanced stainless steel products, George Metals caters to diverse industries including petrochemical, oil & gas, heat treatment, and power generation. In harsh conditions, their 321H square bars are designed for exceptional durability and thermal stability. George Metals provides ASTM and international stainless steel solutions with an emphasis on precision manufacturing, stringent quality control, and timely customer service, guaranteeing performance, dependability, and value for customers in the USA and abroad.
Stainless Steel 321H Square Bars/Rods are austenitic, stabilised stainless steel with a high carbon content (0.04–0.10%) to improve high-temperature strength and 17–19% chromium, 9–12% nickel, and titanium for carbide stabilisation. At temperatures as high as 900°C, they retain their structural integrity and provide exceptional resistance to intergranular corrosion. Mechanical characteristics include good elongation and toughness, a yield strength of 205 MPa, and a tensile strength of about 515 MPa. This grade is perfect for high-temperature applications because it performs well under stress rupture and creep conditions.
Stainless Steel 321H Square Bars Specification :
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 321H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 0.045 max. | 0.03 max. | 0.75 max. |
| Grade | Tensile Str (MPa) min | Yield Str 0.2% Proof (MPa) min | Elong (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321H | 515 | 205 | 40 | 95 | 217 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321H | 1.4438 | S32109 |
| SQUARES | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.62 | 2.05 |
| 18 | 0.79 | 2.59 |
| 20 | 0.76 | 2.49 |
| 22 | 1.18 | 3.87 |
| 25 | 1.52 | 5.00 |
| 28 | 1.91 | 6.27 |
| 30 | 2.19 | 7.20 |
| 32 | 2.50 | 8.19 |
| 36 | 3.16 | 10.37 |
| 38 | 3.52 | 11.55 |
| 40 | 3.90 | 12.80 |
| 45 | 4.94 | 16.20 |
| 50 | 6.10 | 20.00 |
| 56 | 7.65 | 25.08 |
| 60 | – | – |
| 65 | – | – |
| 70 | – | – |
| 75 | – | – |
| 80 | – | – |
| 90 | – | – |
| 100 | – | – |
In high-temperature settings where strength and oxidation resistance are essential, stainless steel 321H square bars and rods are widely used. Boiler tubes, expansion joints, exhaust manifolds, heat exchangers, and furnace parts are examples of common applications. The alloy is appropriate for use in thermal processing, chemical plants, power generation, and aerospace due to its resistance to intergranular corrosion and its capacity to maintain mechanical qualities at high temperatures. Additionally, it is utilised in pressure vessels that are subjected to cyclic heating and refinery equipment. In industrial and structural applications, 321H’s formability, weldability, and improved creep resistance guarantee a long service life and dependable performance.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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