Zhengzhou Huitong Pipeline Equipment Co.,Ltd.
Zhengzhou Huitong Pipeline Equipment Co., Ltd.
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· UNS: S31254
· EN Number: 1.4547
· EN Name: X1CrNiMoCuN20-18-7
· W.Nr.: 1.4529**
· SS: 2378*
· AFNOR: Z1 CNDU 20.18.06AZ*
CHEMICAL COMPOSITION OF ASTM A312 SMO 254 STAINLESS STEEL SEAMLESS PIPES
| C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
| ≤0.020 | ≤0.80 | ≤1.00 | ≤0.030 | ≤0.010 | 20 | 18 | 6.1 | 0.20 | 0.7 |
MECHANICAL PROPERTIES OF ASTM A312 SMO 254 STAINLESS STEEL SEAMLESS PIPES
The following table shows mechanical properties of stainless steel grade 254 SMO™.
| Properties | Metric | Imperial |
| Tensile strength | 680 MPa | 98600 psi |
| Yield strength | 300 MPa | 43500 psi |
| Modulus of elasticity | 195 GPa | 28300 ksi |
| Shear modulus | 75 GPa | 10900 ksi |
| Poisson’s ratio | 0.30 | 0.30 |
| Elongation at break | 50 % | 50 % |
| Hardness, Brinell | 210 | 210 |
ASTM A312 SMO 254 STAINLESS STEEL SEAMLESS PIPES PHYSICAL PROPERTIES The physical properties of stainless steel grade 254 SMO™ are tabulated below.
| Specific Heat (0-100°C) | 500 | J.kg-1.°K-1 |
| Thermal Conductivity | 14 | W.m -1.°K-1 |
| Thermal Expansion | 16.5 | mm/m/°C |
| Modulus Elasticity | 196 | GPa |
| Electrical Resistivity | 8.5 | μohm/cm |
| Density | 8.0 | g/cm3 |
THERMAL PROPERTIES FOR ASTM A312 SMO 254 STAINLESS STEEL SEAMLESS PIPES
The thermal properties of stainless steel grade 254 SMO™ are tabulated below.
| Properties | Metric | Imperial |
| Thermal expansion co-efficient (@20-100°C/68-212°F) | 16.5 µm/m°C | 9.17 µin/in°F |
| Thermal conductivity | 14 W/mK | 97.2 BTU in/hr.ft².°F |