Overview
S30815 is a heat-resistant austenitic stainless steel designed for applications requiring high creep strength and good corrosion resistance, and in many cases has the same high temperature characteristics as highly alloyed alloy steels and nickel-based alloys, due to its chemical balance, the steel has the most suitable overall properties in the temperature range of 850 ° C -1100 ° C, extremely high oxidation resistance. Peeling temperature up to 1150℃; High creep resistance and creep fracture strength; It has good resistance to high temperature corrosion and brush corrosion resistance in most gas media. High yield strength and tensile strength at high temperature; Good formability and weldability, and adequate machinability.
Feature
1.S30815 compared with 310S, 1Cr20Ni14Si2, better performance, Ni, cheap.
2.900℃ has a high strength. In the air, it can be used to 1150℃ under non-pressure conditions, and has superior high-temperature oxidation resistance.
3.the short-term tensile strength at various temperatures is more than 20% higher than the strength of ordinary stainless steel (such as 304, 310S).
4.with high temperature long-term performance (creep performance, durable performance).
Chemical composition
| % | Cr | Ni | Si | C | Mn | P | S | N | Ce | Fe |
| Min | 20 | 10 | 1.4 | 0.05 | - | - | - | 0.14 | 0.03 | Balance |
| Max | 22 | 12 | 2 | 0.1 | 0.8 | 0.04 | 0.03 | 0.2 | 0.08 | - |
Mechanical Properties
| Tensile Str (MPa) min | Yield Str 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness |
| Rockwell B (HR B) max | Brinell (HB) max |
| 600 | 310 | 40 | 95 | 217 |
Physical properties
| Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (mm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat | Electrical Resistivity (nW.m) |
| 0-100°C | 0-600°C | 0-1000°C | at 20°C | at 1000°C | 0-100°C (J/kg.K) |
| 7800 | 200 | 17 | 18.5 | 19.5 | 15 | 29 | 500 | 850 |
Application
1.Furnace components including burners, retorts, conveyor belts, fans, jigs and baskets, rollers, walking beams, radiant tubes, electric heater elements, refractory anchors, hoods, flues, grates, expansion bellows.
2.Petrochemical and refinery tube hangers.
Heat treatment
Solution annealing 1020-1120ºC. Holding time at solution annealing temperature approx. 30 min., followed by rapid cooling in air or water.
Corrosion Resistance
Although not designed for aqueous corrosion resistance the high chromium and nitrogen contents give the grade a pitting resistance approximating that of 316. 253MA does however have a high carbon content so is highly susceptible to sensitisation from welding or service exposure.
Why choose us
1.Size control
2.Chemical composition control
4.ultrasonic testing of steel tube
3.hydraulic testing machine
Package detail
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Austenitic Stainless Steel Pipe ASTM A312 S30805 Heat Resistant Images
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