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Datasheet updated

2023-11-09 14:39
(supersedes all previous editions)

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Alleima® 7RE10 is an austenitic, stainless chromium-nickel steel of the 25/20 type. It has good resistance to carburization, sulfidation and oxidation combined with moderate creep strength and structural stability. Maximum service temperature in air is 1100°C (2010°F).

Standards

  • ASTM: 310S, 310H
  • UNS: S31008, S31009
  • EN Number: 1.4845
  • W.Nr.: 1.4845
  • DIN: X12 CrNi 25 21
  • SS: 2361
  • AFNOR: Z12CN25-20
  • BS: 310S31

Product standards

ASTM A-314
Suitable for production of flanges etc. acc. to ASTM A-182

Certificates

Status according to EN 10 204/3.1

Chemical composition (nominal) %

C
 Si Mn P
 S
 Cr Ni Mo Others
0.05 0.5 1.3 ≤0.030 ≤0.010 24.5 21 - -

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

  • Hollow bar

Mechanical properties

At 20°C

Metric units
Proof strength Tensile strength Elong. Hardness
Rp0.2a Rp1.0a Rm Ab A2" HRB
MPa MPa MPa % %





≥220 ≥240 515-750 ≥35 ≥35 ≤90

At 68°F

Imperial units
Proof strength Tensile strength Elong. Hardness
Rp0.2a Rp1.0a Rm Ab A2" HRB
ksi ksi ksi % %





≥32 ≥35 75-109 ≥35 ≥35 ≤90

1 MPa = 1 N/mm2
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-section area.

At high temperatures

Metric units
Temperature
Proof strength
Rp0.2 Rp1.0
°C MPa MPa
min min
50 200 230
100 190 220
150 180 210
200 170 200
250 165 195
300 160 190
350 155 185
400 150 180
450 145 175
500 140 170
550 135 165
600 130 160
650 125 155
700
120
150

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.