HS18-0-1, 1.3355 - High speed steel

High-speed tungsten steel with addition of vanadium 1.3355, HS18-0-1, AISI T1 according to ISO 4957.

Standard Steel Grade
Chemical Composition %
C: Mn: Si: P: S: Cr: Ni: Mo: V: W: Co:
PN SW18
0.75 - 0.85 <0.4 <0.5 <0.03 <0.03 3.5 - 4.5 <0.4 - 1.0 - 1.4 17.0 - 19.0 <0.3
ISO HS18-0-1 - 1.3355
0.73 - 0.83 <0.4 <0.45 <0.03 <0.03 3.8 - 4.5 - - 1.0 - 1.2 17.2 - 18.7 -
ASTM AISI T1 - UNS T12001 - AMS 5626
0.65 - 0.80 0.1 - 0.4 0.2 - 0.4 <0.03 <0.03 3.75 - 4.50 - - 0.9 - 1.3 17.25 - 18.75 -
NF Z80WCV18-04-01
0.75 - 0.83 <0.4 <0.5 <0.03 <0.03 3.5 - 4.5 - 1.00 - 1.30 - 17.2 - 18.7 -
GOST R18 - Р18
0.73 - 0.83 <0.5 <0.5 <0.03 <0.03 3.8 - 4.4 <0.4 <1.0 1.0 - 1.4 17.0 - 18.5 <0.5

HS18-0-1, 1.3355, AISI T1 - specification and application

High-speed steel with good ductility, machinability and hardness up to 63 HRC used for roughing and finishing tools with medium strength parameters.

SW18 can be used for the production of turning tools, chisel cutters, turning and planing, milling cutters, drill bits, threading tools, saw segments, planer knives, small circular saws, reamers, taps working on automatic machines, and screw cutters.

Mechanical properties of HS18-0-1, 1.3355, AISI T1

  • Hardness in +A delivery condition: <269 HB
  • Hardness in +A+C delivery condition: <319 HB
  • Hardness in +A+CR delivery condition: <339 HB
  • Hardness after hardening and tempering:
    • at 300 ℃ = 63 HRC
    • at 350 ℃ = 60,5 HRC
    • at 400 ℃ = 60,5 HRC
    • at 450 ℃ = 63 HRC
    • at 500 ℃ = 65 HRC
    • at 550 ℃ = 65 HRC
    • at 600 ℃ = 60,5 HRC
    • at 650 ℃ = 57,5 HRC
    • at 700 ℃ = 48 HRC

Heat and plastic treatment of HS18-0-1, 1.3355, AISI T1 - processes and temperatures

  • Softening annealing at a temperature of 800 - 900 ℃
  • Relief annealing at a temperature of 600 - 700℃
  • Heating no. I in a temp. of about 550℃
  • Heating no. II in a temp. of about 850℃
  • Austenitizing at 1230 - 1270 ℃ (hardening in salt bath and oil)
  • Tempering usually in the range of 550 - 570 ℃
  • Tempering usually in the range of 550 - 570 ℃
  • Nitriding in the temperature range of 510 - 530 ℃

In the above mentioned grades the company provides:

Substitutes, equivalents and other species designations

HS18-0-1
HS 18-0-1
AISI T1
AISI T-1
UNS T12001
AMS 5626
CSN 19824
SS 2750
SS2750
SKH2
SKH 2
BT1
RP3
R3
ST SEW 44850
W18Cr4V
X75WCrV18-4-1
1.3558
Z80WCV18-04-01
R18
Р18

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