Rod stainless steel Alleima® 8LR70

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Alleima® 8LR70 is an austenitic, titanium‑stabilized stainless chromium–nickel steel alloyed with molybdenum. It is supplied as round‑cornered square and round billets and is suitable for production of flanges and similar components according to relevant standards.

Standards

• ASTM: 316Ti
• UNS: S31635
• EN Number / W.Nr.: 1.4571
• SS: 2350

Product standards

• EN 10088-3
• ASTM A-314

Certificates

• Status according to EN 10 204 3.1

Chemical composition (nominal) %

• C: 0.06; Si: 0.5; Mn: 1.8; P: 0.045; S: 0.030; Cr: 17; Ni: 11; Mo: 2.1; Others: Ti > 6 x C

Forms of supply — sizes, tolerances and surface conditions

• General: Round‑cornered square and round billets produced in a wide range of sizes; larger sizes on request.
• Surface conditions — Square billets: unground, spot ground or fully ground.
• Surface conditions — Round billets: peel turned or black condition.

Square billets (sizes / tolerance / length)

• 80 mm: tolerance +/-2; length 4 - 6.3 m
• 100, 114, 126, 140, 150 mm: tolerance +/-3; length 4 - 6.3 m
• 160, 180, 195, 200 mm: tolerance +/-4; length 4 - 6.3 m
• >200 - 350 mm: tolerance +/-5; length 3 - 5.3 m

Peel turned round billets (sizes / tolerance / length)

• 75 - 200 mm (5 mm interval): tolerance +/-1; max length 10 m
• >200 - 450 mm: tolerance +/-3; length 3 - 8 m

Unground round billets (sizes / tolerance / length)

• 77 - 112 mm (5 mm interval): tolerance +/-2; max length 10 m
• 124, 134 mm: tolerance +/-2; max length 10 m
• 127, 147, 157 mm: tolerance +/-2; max length 10 m
• 142, 152, 163 mm: tolerance +/-2; max length 10 m
• 168, 178, 188 mm: tolerance +/-2; max length 10 m
• 183, 193 mm: tolerance +/-2; max length 10 m

Mechanical properties (solution annealed and quenched condition) — at 20°C (68°F)

• Proof strength Rp0.2: ≥ 210 MPa
• Proof strength Rp1.0: ≥ 245 MPa
• Tensile strength Rm: 515–700 MPa
• Elongation A: ≥ 40%
• Reduction of area Z: ≥ 50%
• Brinell hardness HB: ≤ 215

Impact strength

• Very good impact strength at room and cryogenic temperatures; tests on bar satisfy 60 J (44 ft‑lb) at -196°C (-320°F) according to prEN13445-2 (UFPV-2) and EN 10272.

Mechanical properties — at high temperatures (metric)

• 100°C: proof strength Rp0.2 min 175 MPa; Rp1.0 min 205 MPa; Rm 440 MPa
• 200°C: Rp0.2 min 155 MPa; Rp1.0 min 185 MPa; Rm 390 MPa
• 300°C: Rp0.2 min 135 MPa; Rp1.0 min 167 MPa; Rm 375 MPa
• 400°C: Rp0.2 min 125 MPa; Rp1.0 min 156 MPa; Rm 375 MPa
• 500°C: Rp0.2 min 119 MPa; Rp1.0 min 149 MPa; Rm 360 MPa

Other products

• Hollow bar

Technical characteristics / specifications

• Material type: Austenitic, titanium‑stabilized stainless chromium–nickel steel (molybdenum‑alloyed)
• Typical standards: ASTM 316Ti / UNS S31635 / EN 1.4571
• Typical nominal composition: see chemical composition table above (C, Si, Mn, P, S, Cr, Ni, Mo, Ti)
• Typical mechanical properties (solution annealed & quenched): Rp0.2 ≥210 MPa; Rm 515–700 MPa; A ≥40%; HB ≤215
• Forms supplied: round‑cornered square billets and round billets in various sizes; peel turned, unground or ground surface conditions
• Certificates: Status according to EN 10 204 3.1
• Datasheet last updated: 2025-05-09 (supersedes all previous editions)