1. HSX® Z10 is a high-strength special steel with a chemical composition of 0.26-0.33% carbon, 0.15-0.80% silicon, 1.20-1.60% manganese, and other alloying elements including 0.08-0.20% vanadium. 2. It has a ferrite-pearlite microstructure and physical properties including a minimum tensile strength of 850 MPa, minimum yield strength of 900 MPa, and minimum elongation of 10%. 3. HSX® Z10 can be induction hardened to a maximum surface hardness of around 55 HRC and has good weldability when special measures are applied due to

1. 1
Chemical composition
(cast analysis in percentage by mass)
High-strength special steel
HSX®
Z10
Element C Si Mn P S N Cr Mo V
min 0,26 0,15 1,20 - 0,007 0,010 - - 0,08
max 0,33 0,80 1,60 0,025 0,020 0,020 0,30 0,08 0,20
Physical and mechanical properties
The analysis corresponds to 30MnVS6 steel (EN steel number: 1.1302)
Sulfur range outside that specified for 30MnVS6 steel, but admissible according to EN 10267:1998
Deviations in the product analysis from the limits specified in the cast analysis are in accordance
with EN 10267:1998
Careful control of production process parameters allows the physical and mechanical
properties to be tailored to the needs of specific applications
Property
Yield point Rp0.2
MPa
Tensile strength Rm
MPa
Elongation after fracture A5
%
min 850 900 10
max - 1100 -

2. 2HSX®
Z10
Fatigue strength under alternating
tension-compression loading
Transverse section, drawn 19.0 mm,
Location of specimen: ½ radius,
Etchant: 2 % HNO3
Longitudinal section, drawn 19.0 mm,
Location of specimen: ½ radius,
Etchant: 2 % HNO3
Microstructure
HSX®
Z10 has a ferrite-pearlite microstructure. The average
grain size is ≥ 6 (grain size number determined on the basis
of ASTM E112).
k = 7.74 Kt = 1.0
Fracture
No. of cycles [-]
1,000
100
10,000 100,000 1,000,000 10,000,000
Unfractured test specimen
Stressamplitude[MPa]
S-N curve (R = -1) in the low-cycle and high-cycle regions for PS
= 50 % and γ = 50 %
[PS
: probability of survival; γ: confidence level]

3. Hardness [HV/10]
Hardness profile in acc. with DIN EN ISO 2639
Distance from surface [mm]
700
600
500
400
300
200
100
0
0 0.5 1 1.5 2 2.5
High-frequency induction hardening
3HSX®
Z10
Joining processes – Welding
The maximum achievable surface hardness is approximately ~ 55 HRC.
High-frequency induction hardening
good weldability
weldable only if
special measures applied
Carbon equivalent
60
55
50
0.45
Surface hardness in HRC
after induction hardening
0,42% C
Standard steel
0,27% C
HSX®
Z10
Carbon content

4. 4HSX®
90
This document is subject to modification without notice. Errors and omissions excepted.
Only those material properties agreed at the time the contract was concluded shall be
considered binding.
The quality of the surface meets the specifications in EN 10277-1.
Round bars are subjected to crack detection testing to verify conformity with surface
quality class 3.
However, no testing is carried out on the final 50 mm at the ends of standard issue rods.
Surface condition
Bright steel, drawn bars
Dimensional range: 4.15 mm to 55 mm
ISO tolerance: h11
Delivery condition
Other agreements may be specified in the order documents.
Miscellaneous
Tensile strength Rm [MPa]
Elongation A5 [%]
1400
1300
1200
1100
1000
900
800
700
6 8 10 12 14 16 18 20
HSX®
130
HSX®
Z12HSX®
110
HSX®
Z10
HSX®
90
HSX®
Z10 Comparison with other products