MATERIAL DESCRIPTION

S165M is a high strength low carbon martensitic/ austenitic stainless steel. It combines high strength, good fatigue resistance with good weldability, properties which are maintained after welding. S165M is designed for application in slightly corrosive environment. Two minimum tensile levels are often used; QT760 and QT900. QT900 is mostly used by the industry. Corrosion resistance is at the level of AISI 304L in most environments, however insensitive to intergranular corrosion.

CHEMICAL COMPOSITION

WEIGHT% C SI MN S P CR NI MO N
MIN.  0,30  0,60  0,005  15,00  4,00  0,80  ≥ 0,020
MAX. ≤ 0,06  0,70  ≤ 1,50  ≤ 0,030  0,040  0,040 17,00  6,00  1,50

Product Standards: ASTM A276, ASTM A479, EN10088-3

APPLICATIONS

The alloy has been designed to resist erosion corrosion or cavitation experienced in hydraulic applications. General areas for applications: Shafts, propellers, spindles, bolts, etc.

Mechanical Properties

CONDITION YIELD STRENGTH
RP0.2
MPA
TENSILE STRENGTH
RM
MPA
ELONGATION
[%]
HARDNESS
[HB]
IMPACT
CHARPY-V, -40ºC
[J]
BAR  ≥ 750  900 – 1100  ≥ 16  280 – 340  ≥ 32
 QT900  920  1050  18  300  100

Heat Treatment

Austenitize and quench from 950 to 1050°C and immediate temper at 600°C for 8 hours followed by cooling in air.

Weldability

Good, the low carbon martensite with the finely dispersed residual austenite yields an excellent HAZ toughness in the as welded
condition. Preheating to 100°C – 200°C is suggested for very thick section or when the stress concentration after cooling require it.

ALLOY 1.4418 / S165M ROUND BAR K12

DESCRIPTION KG/M
41 mm k12 finish 10.6
46 mm k12 finish 13.4
51,2 mm k12 finish 16.5
56,4 mm k12 finish 20.
61,2 mm k12 finish 22.8
66,2 mm k12 finish 27.7
71,4 mm k12 finish 31.5
81,4 mm k12 finish 41.
86,4 mm k12 finish 47.
91,4 mm k12 finish 52.7
102 mm k12 finish 65.
107 mm k12 finish 72.1
112 mm k12 finish 79.
115 mm k12 finish 83.3
117 mm k12 finish 86.3
122 mm k12 finish 93.8
127 mm k12 finish 101.6
132 mm k12 finish 109.8
143 mm k12 finish 128.8
153 mm k12 finish 147.5
165 mm k12 finish 171.5
173 mm k12 finish 189
184 mm k12 finish 213
190 mm k12 finish 227
206 mm k12 finish 267
226 mm k12 finish 320
246 mm k12 finish 382
256 mm k12 finish 412
286 mm k12 finish 515
306 mm k12 finish 590
335 mm k12 finish 707
360 mm k12 finish 816
410 mm k12 finish 1058

ALLOY 1.4418 / S165M ROUND BAR GROUND H9

DESCRIPTION KG/M
10 mm ground h9 0,630
12 mm ground h9 0.910
16 mm ground h9 1.600
20 mm ground h9 2.600
25 mm ground h9 3.900
30 mm ground h9 5.600
32 mm ground h9 6.500
35 mm ground h9 7.700
38 mm ground h9 8.900
40 mm ground h9 10.100
45 mm ground h9 12.490
50 mm ground h9 15.700
55 mm ground h9 18.700
60 mm ground h9 22.600
65 mm ground h9 26.000
70 mm ground h9 30.800
75 mm ground h9 35.500
80 mm ground h9 40.200
90 mm ground h9 50.900
100 mm ground h9 62.900
110 mm ground h9 75.000
120 mm ground h9 88.800
125 mm ground h9 96.300
140 mm ground h9 123.000