20X2H4A Round bar stock available
| Product parameters | |
| Material category:: | 1.4% Cr - 3.5% Ni High tensile steel |
| Material technical standards:: | TOCT 4543 - 1971 |
| Stock & Inventory available:: | Diameter 20 ~ 180mm |
| Min. order quantity:: | 50 kg |
| Production lead time:: | Within 7 days after 30% deposit prepayable |
Description
TECHNICAL DATA SHEET - 20X2H4A
TECHNICAL SPECIFICATION: TOCT 4543 - 1971
MATERIAL CATEGORY: alloy structural steel Cr - Ni type
TYPICAL CHEMICAL ELMENTS ( mass fraction %)
Carbon, C (％): 0.16 ~ 0.22
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.30 ~ 0.60
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 1.25 ~ 1.65
Nickel, Ni (％): 3.25 ~ 3.65
Molybdenum, Mo (％): -
Copper, Cu (%): ≤ 0.30
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Hot working temperarture: 1180 ~ 850 Deg.
Heat treatment: Quenching 860 Deg. oil cooling
Tempering 180 air or oil cooling
Tensile strength, σb ≥ MPa: 1275
Yield strength, σ0.2 ≥ MPa: 1079
Elongation, δ5 ≥ (％): 9.0
Reduction of area, ф ≥ (％): 45.0
Impact, AK (J/cm2): 78
Annealed hardness | HBW: 269.
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, Mechanical gears, gear shaft, main axis, valve rods.
Mechanical parts - connecting rods, bolts and nuts, Multidiameter shafts.
PRODUCT PROFILE AND DIMENSIONS
Rod / round bar / disc (diameter): 5.5mm to 900mm
Square bar / flat bar: 8mm to 600mm
Forging piece: stepped shafts, other different shapes based on OEM.
