Stainless Steel Alloy Grade 309 309S 309H
309
309S
309H
309Cb
309HCb
309L
The product specifications come in a wide variety of sizes, so the prices will vary. For the exact prices, please
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Product Name: Stainless Steel Alloy Grade 309 309S 309H
Product Thickness: 0.3–100 mm
Quality Certificate: Provided
Material: 309 Stainless Steel
Weight Calculation: Theoretical weight or actual scale weight
Standard: GB (Chinese National Standard)
Surface Finish: Cold-rolled, hot-rolled, mirror, brushed, pickled, matte, bright
Manufacturers/Origins: TISCO, Baosteel, LISCO, POSCO, Hongwang, Northeast Special Steel, Baoxin, Tsingshan Yongjin
Processing Services: Leveling/cut-to-length, laser cutting, surface treatment, film coating, slitting, stamping, drilling, deep drawing
Common specifications for 309 stainless steel:
309 Stainless Steel Plate/Sheet:
Thickness: 0.5 mm – 800 mm
Length: 1 m – 18 m
Width: 0.5 m – 3.8 m
309 Stainless Steel Pipe/Tube Specifications:
Outer Diameter: Common sizes include 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 180 mm, 200 mm, 220 mm, 250 mm, 280 mm, 300 mm, 320 mm, 350 mm, 400 mm, 450 mm, 500 mm.
Wall Thickness: Common sizes include 0.5 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.6 mm, 2.0 mm, 2.5 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 8.0 mm, 9.0 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm. 20mm, 22mm, 25mm, 28mm, 30mm, etc.
309 Stainless Steel Bar Specifications:
Diameter: Common diameter specifications include 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 42mm, 45mm, 48mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 180mm, 200mm, 220mm, 250mm, 300mm, etc.
| Mark | Core feature | Key differences | Typical use |
|---|---|---|---|
| 309 | Basic grade, with a relatively high carbon content | The carbon cap is approximately 0.20% | General heat-resistant components |
| 309S | Low-carbon Version 309 | The upper limit of carbon is reduced to below 0.08%, and chromium carbide is less likely to precipitate at the grain boundaries after welding, and has better weldability | Welded structural components and furnace parts |
| 309H | High-carbon version 309 | When the carbon content is controlled at 0.04-0.10%, the high-temperature creep strength of is higher | High-temperature pressure-bearing components, boiler superheaters |
| 309Cb | Niobium-containing stabilized version | Adding niobium (Nb) element preferentially combines with carbon to prevent intergranular corrosion during welding | In situations where welding is required and high corrosion resistance is demanded |
| 309HCb | High-carbon + niobium-containing version | Combining the characteristics of high carbon (0.04-0.10%) and niobium addition, simultaneously possesses high creep strength and resistance to intergranular corrosion | Harsh working conditions with high temperature, high pressure and complex welding |
| 309L | Ultra-low carbon version | It has a lower carbon content (usually ≤0.03%), the best welding performance , and the strongest resistance to intergranular corrosion | Thick cross-section welded parts, petrochemical equipment |
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