420 1.4021 X20Cr13 Stainless Steel For Steam Turbine Blade
Supplying dimension
Round bar from 30mm to 600mm Diameter
Flat and square bar from 30mm to 500mm Width
8mm to 300mm Thickness
*accept special shape
Forming option
Hot rolling or hot forged
Smelting process
EAF →VD→LF→ESR Electro-Slag Remelting
Surface option
Black
Grinding
Rough turned
Peeled
Polished
Quality
UT, size and surface for each pcs
Macrostructure
Ferritic Metallographic
Grain size
Nonmetallic inclusion
Etch test of tower sample
Delivery condition and hardness
Annealed or high temperature temper
| Annealed | high temperature temper | Hardness |
| 800 to 900 Celsius, slow | 700 to 770 Celsius, fast | Max 223 HBW |
*Accept +QT delivery condition
Equivalent Grade
| Chinese UNS | Chinese New Grade | Chinese Old Grade | JIS | ASTM SAE AISI | EN BS DIN | EN BS DIN |
| S42020 | 20Cr13 | 2Cr13 | SUS420 | 420 | 1.4021 | X20Cr13 |
Chemical component
| C | Si | Mn | P | S | Ni | Cr | Cu |
| 0.16 to 0.24 | Max 0.60 | Max 0.60 | Max 0.030 | Max 0.020 | Max 0.60 | 12.00 to 14.00 | Max 0.30 |
Mechanical property and heat treatment
| Type | Quench temperature | Temper temperature | Specified Plastic Elongation Strength | Tensile strength | Elongation | Reduction | Impact | Hardness |
| 1 | 950 to 1020 Celsius, air, oil | 660 to 770 Celsius, oil, air, water | Min 490 Mpa | Min 665 Mpa | Min 16 % | Min 50% | Min 27 KJ | 212 to 262 HBW |
| 2 | 980 to 1030 Celsius, oil | 640 to 720 Celsius, air | Min 590 Mpa | Min 735 Mpa | Min 15 % | Min 50% | Min 27 KJ | 229 to 277 HBW |
