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AISI 347 / 347H (1.4550, UNS S34700)
AISI 347 / 347H (1.4550, UNS S34700) is an austenitic stainless steel containing niobium. The AISI 347 / 347H (1.4550, UNS S34700) is the perfect low-cost solution for high-temperature applications.
AISI 347 / 347H is characterized by high corrosion resistance at elevated temperatures. Due to the presence of niobium in AISI 347 / 347H (1.4550, UNS S34700). The material becomes sensitive to intergranular corrosion. Stabilization with niobium prevents the formation of chromium carbide and therefore increases the resistance to corrosion. AISI 347 / 347H (1.4550, UNS S34700) has an excellent weldability characteristic of austenitic steels.
AISI 347 / 347H (1.4550, UNS S34700) has high mechanical properties. The main applications of AISI 347 / 347H (1.4550, UNS S34700) alloys are corrosive environments and high temperature environments. AISI 347 / 347H (1.4550, UNS S34700) is mainly used for aircraft collector rings, engine parts for rockets, exhaust manifolds for automobiles, expansion joints and high temperature chemical processing equipment.
AISI 347 / 347H (1.4550, UNS S34700) PHYSICAL PROPERTIES
- Density : 8.0 g / cm3
- Modulus of elasticity : 193 GPa
- Approx. Thermal expansion
- 0 ° C’den 100 ° C’ye :16.6 μm / m ° C
- 0 ° C – 538 ° C arası :18.6 μm / m ° C
- 100 ° C’de Isıl İletkenlik :16.1 W / m.K
- Specific heat : 500 J / kg.K
- Electrical resistivity : 730 nW.m
- Melting point : 1400-1425 ° C
AISI 347 / 347H (1.4550, UNS S34700) COMPOSITION
| Element | 347 | 347H |
| Crom | 17.00 min.-19.00 max. | 17.00 min.-19.00 max. |
| Nickel | 9.00 min.-13.00 max. | 9.00 min.-13.00 max. |
| Carbon | 0.08 | 0.04 min.-0.10 max. |
| Maganese | 2.00 | 2.00 |
| Phosphor | 0.045 | 0.045 |
| Sulfur | 0.03 | 0.03 |
| Silicon | 0.75 | 0.75 |
| Colombium & Tantal | 10 x (C + N) min.-1.00 max. | 8 x (C + N) min.-1.00 max. |
| Iron | Balance | Balance |
AISI 347 / 347H (1.4550, UNS S34700) MECHANICAL PROPERTIES
Typical values at 68 ° F (20 ° C)
| Yield strength
% 0,2 Ofset |
Tensile strenth | Elongation | Hardness | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | (max.) |
| 30,000 | 205 | 75,000 | 515 | 40 | 201 Brinell |
AISI 347 / 347H (1.4550, UNS S34700) SHAPES SUPPLIED
- AISI 347 / 347H (1.4550, UNS S34700) pipe
- AISI 347 / 347H (1.4550, UNS S34700) plate
- AISI 347 / 347H (1.4550, UNS S34700) sheet
- AISI 347 / 347H (1.4550, UNS S34700) rod
- AISI 347 / 347H (1.4550, UNS S34700) bar
- AISI 347 / 347H (1.4550, UNS S34700) wire
- AISI 347 / 347H (1.4550, UNS S34700) welding wire / rod
AISI 347 / 347H (1.4550, UNS S34700) STANDARD AND SPECIFICATIONS
- AISI 347
- AISI 347H
- 1.4550
- UNS S34700
- X6CrNiNb18-10
- AFNOR Z 6 CNNb 18.10,
- UNI X 8 CrNiNb 18 11
- JIS SUS 347
- SS14 2338
- AMS 5512
- AMS 5556
- AMS 5558
- AMS 5571
- AMS 5575
- AMS 5646
- AMS 5654
- ASME SA182
- ASME SA193
- ASME SA194
- ASME SA213
- MIL SPEC MIL-S-862
- MIL SPEC MIL-S-23196
- SAE J405 (30347)
- DIN 1.4550
- ISO 683/13 16
