Similar Grades:
UNS T30104
Shape:
Round, Flat, Square.
Size Range:
| |
Diameter(mm) |
Thickness (mm) |
Width (mm) |
Length(mm) |
| Round |
20-480 |
- |
- |
2000-5800 |
| Square |
20-480 |
- |
- |
2000-5800 |
| flat |
- |
20-50 |
80-600 |
2000-5800 |
Steel-making Condition:
EF, EF/EAF+LF+VD, EF/EAF+ESR
Delivery Condition:
Annealed , Quenched + Tempered
Surface Condition:
Black, Grinded, Peeled, Rough turned, Polished
Features:
1.Competitive price
2.Immediate delivery
3.Premium quality
4.Reliable service
5.MOQ: 1 Ton
| Packing details |
In seaworthy packing, as your requirement. |
| Delivery details |
within 30-50 days |
Chemical Composition(%)
| C |
Mn |
P |
S |
Si |
Cr |
W |
Mo |
| 0.95-1.05 |
1.80-2.20 |
<= 0.030 |
<=0.030 |
0.10-0.70 |
0.90-2.20 |
/ |
0.90-1.40 |
Physical Properties
The physical properties of A4 tool steels are given in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.03 g/cm3 |
0.290 lb/in3 |
Mechanical Properties
Properties |
Metric |
Imperial |
| Hardness, Rockwell C (as air quenched from 845°C, 61 HRC at 150°C temper, 60 HRC at 205°C temper, 59 HRC at 260°C temper, 58 HRC at 315°C temper, 57 HRC at 370°C temper, 56 HRC at 425°C temper, 54 HRC at 480°C temper, 53 HRC at 540°C temper, 50 HRC at 595°C temper, 40 HRC at 650°C temper.) |
63 |
63 |
| Bulk modulus (typical for steels) |
140 GPa |
20300 ksi |
| Machinability (based on carbon tool steel) |
65% |
65% |
| Shear modulus (typical for steels) |
80.0 GPa |
11600 ksi |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Elastic modulus |
190-210 GPa |
27557-30457 ksi |
Introduction:
Steels of the type A2, A3, A4, A6, A7, A8, A9, and A10 form air-hardening, medium alloy, cold work steels or group A steels. Sufficient amounts of manganese, molybdenum and chromium present in group A steels provide full hardness in sections comprising a thickness of at least 100 mm (4 in.) in diameter when air cooled.
Carbon is present in the range of 0.5 to 2% in group A steels. These steels are provided with air hardening characteristics that allow minimum cracking and distortion on quenching.
The sections below will provide an overview of A4 air-hardening, medium-alloy, cold-work tool steels.
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