ISO 4957 Tool Steel 1.2731 Round bar, ESR ingot
| Product parameters | |
| Material Category:: | Tool Steel |
| Stocklist & Inventory Available:: | Round bar Dia. 50 ~ 150mm, ESR ingot |
| Melting Process Route:: | + ESR |
Description
MATERIAL DATA SHEET - DIN 1.2731
MATERIAL CATEGORY - Hot working tool steel
MATERIAL SPECIFICATIONS - EN ISO 4957: 2000 , DIN 17350 (1980)
TYPICAL CHEMICAL COMPOSITIONS (mass weight - %)
C (％): 0.45 ~ 0.55
Si (％): 1.20 ~ 1.50
Mn (％): 0.60 ~ 0.80
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 12.0 ~ 14.0
Mo (％): -
V (％): 0.30 ~ 1.00
Ni (％): 12.5 ~ 13.5
W (%): 1.50 ~ 2.80
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature ℃: 1050～850
Annealing temperature ℃: -
Hardness after annealing ≤HBW: -
Quenching temperature ℃: 980~1030
Cooling medium: Oil
Common tempering temperature ℃: 400~600
Hardening value after tempering at temperature /MPa |400℃: -
Hardening value after tempering at temperature MPa |500℃: -
Hardening value after tempering at temperature MPa |600℃: -
Hardening value after tempering at temperature MPa |650℃: -
MELTING PROCESS
This alloy is generally smelt in electric arc furnace (EAF ) or IFF + VD, LF + Electroslag remelting (ESR). For a purpose of higher quality, it should be smelt via technology of vacuum refining and external refining.
HEAT TREATTMENT PRACTICE
The preheating of measuring and cutting tool steel is spheroidizing annealing, final heat treatment is quenching + low temperature tempering and hardness after heat treatment can reach 60~65HRC. When heat treat tool steel grades consideration should be given to hardening temperature, including ratio of heating, cooling and soaking times which will differ due to factors such as the shape and size of each chemical component. Other considerations during heat treatment include the type of furnace, quenching medium and work piece transfer facilities.
PRODUCT FORMS & DIMENSIONS
Round bar / disc (diameter1): 5.5mm to 450mm
Square bar / Flat bar: 10mm to 400mm
Heavy/middle plate via hot rolled: T6 - 200mm X W40 - 1200mm X L1000-12000mm
Forging piece: stepped shafts, other different shapes based on OEM.
