Alleima® 253 MA Billets

Datasheet updated

2022-06-29 13:07
(supersedes all previous editions)

Alleima® 253 MA* is an austenitic chromium-nickel steel alloyed with nitrogen and rare earth metals. The grade is characterized by:

  • High creep strength
  • Very good resistance to isothermal and, above all, cyclic oxidation
  • Very good resistance to combustion gases
  • Good structural stability at high temperatures
  • Good weldability
  • The grade can be used at temperatures up to about 1150°C (2100°F)

Trademark information: Alleima® 253 MA is a trademark owned by Outokumpu OY.

Standards

  • ASTM: F45
  • UNS: S30815
  • EN Number: 1.4835

Product standards

Suitable for the production of flanges etc. according to ASTM A182 grade F45.

Certificates

Status according to EN 10 204 3.1

Chemical composition (nominal)

Chemical composition (nominal) %
C Si Mn P S Cr Ni
0.08 1.6 0.6 ≤0.040 ≤0.030 21 11

Others: N=0.17 Ce=0.05*
* To cerium should be added the quantity of other rare earth metals, since the the additive takes the form of misch metal containing about 50% Ce.

Chemical composition (nominal) %

C
Si Mn P
S
Cr Ni Mo Others
0.08 1.6 0.6 ≤0.040 ≤0.030 21 11 - N=0.17
Ce=0.05*

* To cerium should be added the quantity of other rare earth metals, since the the additive takes the form of misch metal containing about 50% Ce.

Forms of supply

Sizes and tolerances

Round-cornered square, as well as round billets, are produced in a wide range of sizes according to the following tables. Larger sizes offered on request.

Surface conditions

Square billets

Unground, spot ground or fully ground condition.

Round billets

Peel turned or black condition.

Square billets
Size Tolerance Length
mm mm m
80 +/-2 4 - 6.3
100, 114, 126, 140, 150 +/-3 4 - 6.3
160, 180, 195, 200 +/-4 4 - 6.3
>200 - 350 +/-5 3 - 5.3

Sizes and tolerances apply to the rolled/forged condition.

Peel turned round billets
Size Tolerance Length
mm mm m
75 - 200 (5 mm interval) +/-1 max 10
>200 - 450 +/-3 3 - 8
Unground round billets
Size Tolerance Length
mm mm m
77 - 112 (5 mm interval) +/-2 max 10
124, 134 +/-2 max 10
127, 147, 157 +/-2 max 10
142, 152, 163 +/-2 max 10
168, 178, 188 +/-2 max 10
183, 193 +/-2 max 10

Other products

  • Seamless tube and pipe

* 253 MA is a trademark owned by Outokumpu OY.

  • Hollow bars

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Alleima materials.