piston pin material for turbo / SC lexus engine

[ash]

looking @ 200+ hp per cylinder
what size , and material type people are using..

9310 ?
H-13
C-350


with the lexus pin only being .866, i see many people running .927 sbc size
some rod manufactures wanted .990 BBC size pins, but seemd heavy.

info on C-350 steel included

VascoMax® C-350 Specialty Steel, Heat Treatment: 927°C (1700°F) + Age

Subcategory: Ferrous Metal; Maraging Steel; Metal

Key Words: Allvac, an Allegheny Teledyne Company; Maraging Steel, PWA 1091. PDS 10705Z2.
Component Wt. %
Al 0.1
C 0.02
Co 12
Fe 63

Component Wt. %
Mn 0.05
Mo 4.8
Ni 18.5
P 0.005

Component Wt. %
S 0.005
Si 0.05
Ti 1.4

Material Notes:
Iron content calculated as remainder. Data provided by Allvac.

Applications: Missile components. Tooling. Spring wire for valve springs in high-performance internal combustion engines.

Physical Properties Metric English Comments
Density 8.08 g/cc 0.292 lb/in³

Mechanical Properties
Hardness, Brinell 529 529 Estimated from Rockwell C value for Brinell test with 3000 kg load/10 mm diameter ball
Hardness, Knoop 585 585 Estimated from Rockwell C value.
Hardness, Rockwell C 53 53
Hardness, Vickers 559 559 Estimated from Rockwell C value.
Tensile Strength, Ultimate 2310 MPa 335000 psi
Tensile Strength, Yield 2242 MPa 325000 psi 0.2% Offset
Elongation at Break 6 % 6 %
Reduction of Area 25 % 25 %

 

[FoPar]

looking @ 200+ hp per cylinder
what size , and material type people are using..

9310 ?
H-13
C-350


with the lexus pin only being .866, i see many people running .927 sbc size
some rod manufactures wanted .990 BBC size pins, but seemd heavy.

info on C-350 steel included

VascoMax® C-350 Specialty Steel, Heat Treatment: 927°C (1700°F) + Age

Subcategory: Ferrous Metal; Maraging Steel; Metal

Key Words: Allvac, an Allegheny Teledyne Company; Maraging Steel, PWA 1091. PDS 10705Z2.
Component Wt. %
Al 0.1
C 0.02
Co 12
Fe 63

Component Wt. %
Mn 0.05
Mo 4.8
Ni 18.5
P 0.005

Component Wt. %
S 0.005
Si 0.05
Ti 1.4

Material Notes:
Iron content calculated as remainder. Data provided by Allvac.

Applications: Missile components. Tooling. Spring wire for valve springs in high-performance internal combustion engines.

Physical Properties Metric English Comments
Density 8.08 g/cc 0.292 lb/in³

Mechanical Properties
Hardness, Brinell 529 529 Estimated from Rockwell C value for Brinell test with 3000 kg load/10 mm diameter ball
Hardness, Knoop 585 585 Estimated from Rockwell C value.
Hardness, Rockwell C 53 53
Hardness, Vickers 559 559 Estimated from Rockwell C value.
Tensile Strength, Ultimate 2310 MPa 335000 psi
Tensile Strength, Yield 2242 MPa 325000 psi 0.2% Offset
Elongation at Break 6 % 6 %
Reduction of Area 25 % 25 %

.200'' thick H-13 tool steel

 

[ash]

.866 ? or .927

 

[ash]

ive broken / bent 52 S material @ 188hp / cyclinder
the H-13 is $17 per pin
the C-350 is $ 85 per pin

 

[FoPar]

.927.. i know people running .200'' thick tool steel in excess of 11.5:1 CR 2000hp and 50psi.

JE makes a .220'' thick tool steel, those are what i run in my modular.

 

[ash]

ok..ta
thought soo

 

[ash]

.927.. i know people running .200'' thick tool steel in excess of 11.5:1 CR 2000hp and 50psi.

JE makes a .220'' thick tool steel, those are what i run in my modular.

yer ok..
my new sbc turbo ones are .241'
11.8
twin 76's
9310 material

 

[XR8tt]

9310 in my C.P's...

 

[ash]

found out a few nitro bikes run .866 pins...
hmmmm
looks like they will work for a bit of blown methanol...