1055
Qilu
Product Description
EN9 C55 S55C 1055 Forging Steel
1: AISI 1055 Steel Introduction
1055 steel is an unalloyed medium carbon engineering steel which has 0.52%-0.6% Carbon as per EN10083 standard.It will obtain high hardness and high strength after hardening due to the relatively high carbon content,and also can be flame or induction hardened to surface hardness Min 58HRC.C55 steel is generally supplied in an untreated or normalised condition.
1055 steel Stock in warehouse
2: Relevant Standards
| USA | UK | China | Japan | Australia |
| 1055 | 070M55 / EN9 | 55# | S55C | 1055 |
3: AISI 1055 Steel Chemical Composition
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni | Cr+Mo+Ni |
| C55/1.0535 | 0.52-0.6 | 0.60-0.90 | ≤ 0.045 | ≤ 0.045 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
| C55E/1.1203 | 0.52-0.6 | 0.60-0.90 | ≤ 0.03 | ≤ 0.035 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
| C55R/1.1209 | 0.52-0.6 | 0.60-0.90 | ≤ 0.03 | 0.02-0.04 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
4: AISI 1055 Steel Mechanical Properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
5: AISI 1055 Steel Overviews
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm | |
| Width 20mm-1000mm | ||
| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
6: AISI 1055 Steel Application
1055 is a medium carbon steel suitable for various type of applications where high strength is needed.It is used for components of small cross section requiring low tensile strength, and heavy forgings in the normalized condition for automotive and general engineering such as axles, clutch members, shafts, pressed and punched parts, piston rods and gear racks.
7: AISI 1055 Steel Heat Treatment
ANNEALING
As mentioned above, forgings may be transferred to a furnace at a temperature that may approximate to the forging finishing temperature. The full annealing cycle of this grade is a soak at a temperature of 1450-1600oF (790-870oC) cooling to 1200oF (650oC) at 50oF (28oC) per hour, soaking and subsequently air cooling.
NORMALIZING
This steel will on occasion require normalizing prior to further heat treatment such as hardening and tempering. This is carried out at a temperature of 1650oF (900oC) followed by air cooling.
HARDENING
This steel is austenitized at 1475-1550oF (800-845oC) followed by water or oil quench depending upon section size and complexity.
TEMPERING
This steel will be tempered at a temperature to give required mechanical properties, based on past experience. It should be noted that there is a danger of temper brittleness in the temperature range of 500-600oF (260-315oC.)
8: 1055 Steel Tolerance
Diameter(mm) | Tolerance | ||
Forged Steel Round Bar | 80-600 | Black Surface:0~+5 | Rough Machined or Turned:0~+3 |
650-1200 | Black Surface:0~+15 | Rough Machined or Turned:0~+3 | |
Hot Rolled Steel Round Bar | 16-310 | Black Surface:0~+1 | Peeled:H11 |
Cold Drawn Steel Round Bar | 6-100 | Black Surface:H11 | Peeled:H11 |
9: Delivery Condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
