Hemi Metals, located in Hamilton, New Zealand, is a reliable manufacturer and supplier of high-strength Stainless Steel 431 Hollow Bars, designed for tough mechanical and engineering tasks. SS 431 is a martensitic stainless steel celebrated for its impressive blend of high tensile strength, solid corrosion resistance, and remarkable toughness. Crafted with precision and controlled heat treatment, these hollow bars excel in high-stress settings. Hemi Metals caters to various industries, including aerospace, marine, power generation, heavy engineering, and precision machining, where strength, durability, and reliability are crucial.
Stainless Steel 431 is made up of about 15–17% chromium and 1.25–2.5% nickel, with a carefully managed carbon content. This unique blend offers better corrosion resistance compared to standard martensitic grades while ensuring excellent hardenability through heat treatment. After hardening and tempering, SS 431 hollow bars typically boast a tensile strength between 850 and 1000 MPa, along with high yield strength and good impact toughness. The material is magnetic, exhibits solid fatigue resistance, and maintains dependable mechanical performance even under high load and rotational stress.
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
Range : Range – 3.17mm to 350mm dia
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 431 | 0.20 | 17.00-15.00 | 1.00 | 2.50-1.25 | 0.040- | 0.030 | 1.00 |
| Element | Density | Electrical Resistivity | Modulus of Elasticity |
| SS 431 | 0.2800 lb/inch³ | 70° Ohms (circ mil./ft.) | 29.0 X 10^3 |
| Hollow Bar | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.49 | 1.60 |
| 18 | 0.62 | 2.02 |
| 20 | 0.76 | 2.49 |
| 22 | 0.92 | 3.02 |
| 25 | 1.19 | 3.90 |
| 28 | 1.49 | 4.89 |
| 28 | 1.49 | 4.89 |
| 30 | 1.71 | 5.61 |
| 32 | 1.95 | 6.38 |
| 36 | 2.46 | 8.08 |
| 38 | 2.74 | 9.00 |
| 40 | 3.04 | 9.97 |
| 45 | 3.85 | 12.62 |
| 50 | 4.75 | 12.62 |
| 56 | 8.96 | 19.55 |
| 60 | 6.84 | 22.44 |
| 65 | 8.03 | 26.34 |
| 70 | 9.31 | 30.54 |
| 75 | 10.69 | 35.06 |
| 80 | 12.16 | 39.89 |
| 90 | 15.39 | 50.49 |
| 100 | 19 | 62.34 |
SS 431 Hollow Bar is commonly used in industries such as aerospace, automotive, marine, and chemical processing. It is utilized for manufacturing components like shafts, valves, pumps, and fittings, where high strength, corrosion resistance, and durability are essential.
Common sizes for SS 431 Hollow Bar typically range from 25 mm to 500 mm in outer diameter, with wall thicknesses varying from 3 mm to 50 mm. Custom sizes may also be available depending on specific requirements or suppliers.
Stainless Steel 431 Hollow Bars find extensive use in applications that demand high strength, wear resistance, and moderate corrosion protection. They’re commonly found in aerospace components, marine shafts, pump shafts, drive shafts, hydraulic systems, and heavy-duty fasteners. In power plants and industrial machinery, SS 431 hollow bars serve as spindles, rotors, couplings, and structural tubular components. They also play a role in mining equipment, defense components, and high-load mechanical systems. With their excellent strength-to-weight ratio, machinability, and heat-treatable properties, they ensure reliable performance in critical rotating and load-bearing applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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