EN25

SpecificationBS 970 Part 3 826M31

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Introduction

Product properties

˙ High strength

Industrial Applications

˙ Aerospace industry

˙ Machine industry

˙ Mainly used for landing gear, aero-engine, and fuselage parts, heavy gear, pinion, link rod, crank shaft, differential shaft, and other transmission parts, high-strength bolt, and stud motor shaft, turbine disk


Specifications

Chemical composition (wt. %)

Element
C
Si
Mn
P
S
Ni
Cr
Mo
Min.
0.27
0.10
0.45
-
-
2.30
0.50
0.45
Max.
0.35
0.40
0.70
0.035
0.040
2.80
0.80
0.65

Physical Property

Density (g/cm^3)
8.08

Thermal Expansion Coefficient

Temperature (℃)
10^-6/℃
277
14

Thermal Conductivity

Temperature (℃)
W/m·K
941
12.3

Mechanical Property

Items
Annealed
Hardness
277 HBW max.

Size Ranges

Products
Diameter (mm)
Length (mm)
Rolled bar
10~95
3,000~5,700
Forged bar
95.2~600
3,000~5,700
Billet
130x130, 140x140, 150x150, 160x160
7,000 max.
Flat bar
80x80 (min.)
Based on the customer needs

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