Density of steel, Elastic modulus and Maximum bending stress
material number [1]
grade name [1]
AISI
Elastic modulus E ¦ 20°C [2]
Density ¦ 20°C [2]
Maximum bending stress σ ¦20°C (Rp1,0)
Pipe welded
Pipe seamless
[kN/mm²]=GPa
[kg/m³]
[N/mm²]=MPa
Literature
[N/mm²]=MPa
Literature
1.0038
S235JR (RST 37-2)
212
7850
40 (235)
[0] (-)
40 (235)
[0] (-)
1.0345 ¦ 1.0305
P235GH ¦ - (HI ¦ ST35.8)
212
7850
40 (235)
[0] ([5])
40 (235)
[0] ([5])
1.4301
X5CrNi18-10
304
196
7920
40 (230)
[0] ([3] Rp1,0)
40 (230)
[0] ([4] Rp1,0)
1.4404
X2CrNiMo17-12-2
316L
196
7960
40 (225)
[0] ([3] Rp1,0)
40 (225)
[0] ([4] Rp1,0)
1.4571
X6CrNiMoTi17-12-2
316Ti
196
7960
40 (245)
[0] ([3] Rp1,0)
40 (245)
[0] ([4] Rp1,0)
1.4539
X1NiCrCu25-20-5
904L
196
7760
40 (250)
[0] ([4] Rp1,0)
Choosing the maximum bending stress to equal 40 [N/mm²] limites the effect of bending such that beamtheorie is applicable and stress induced by inner pressure and
stress induced by bending can be calculated separately [0.1]. For comparison in brackets you find the 1,0% offset
yield strength Rp1,0. With rising temperatures the safety margin decreases.
Temperature °C
100
150
200
250
300
350
400
material number [1]
grade name [1]
AISI
Literature
Elastic modulus E [kN/mm²]=GPa
1.0345 ¦ 1.0305
P235GH ¦ - (HI ¦ ST35.8)
207
199
192
184
[2]
1.4301
X5CrNi18-10
304
190
182
174
166
[2]
1.4404
X2CrNiMo17-12-2
316L
190
182
174
166
[2]
1.4571
X6CrNiMoTi17-12-2
316Ti
190
182
174
166
[2]
1.4539
X1NiCrMoCu25-20-5
904L
190
182
174
166
[2]
Maximum bending stress σ [N/mm²]=MPa (Rp1,0)
1.0345 ¦ 1.0305
P235GH ¦ - (HI ¦ ST35.8)
40 (212)
40 (198)
40 (185)
40 (165)
40 (140)
40 (120)
40 (112)
[0] ([5])
1.4301
X5CrNi18-10
304
40 (190)
40 (170)
40 (155)
40 (145)
40 (135)
40 (129)
40 (125)
[0] ([3]+[4] Rp1,0)
1.4404
X2CrNiMo17-12-2
316L
40 (200)
40 (180)
40 (165)
40 (153)
40 (145)
40 (139)
40 (135)
[0] ([3]+[4] Rp1,0)
1.4571 seamless hot formed
X6CrNiMoTi17-12-2
316Ti
40 (199)
40 (181)
40 (167)
40 (157)
40 (145)
40 (139)
40 (135)
[0] ([4] Rp1,0)
1.4571 cold forged
X6CrNiMoTi17-12-2
316Ti
40 (218)
40 (206)
40 (196)
40 (186)
40 (175)
40 (169)
40 (164)
[0] ([3]+[4] Rp1,0)
1.4539
X1NiCrMoCu25-20-5
904L
40 (235)
40 (220)
40 (205)
40 (190)
40 (175)
40 (165)
40 (155)
[0] ([3]+[4] Rp1,0)
Literature
[0] Technische Regeln zur Druckbehälterverordnung TRR100 September 2002, Erläuterungen zu 6.2.2 Kapitel 1.2, Carl Heymanns Verlag
[0.1] TRR100, Kapitel 6.2.2
[1] www.stahldaten.de
[2] Taschenbuch der Stahl-Eisen-Werkstoffblätter 9. Auflage, SEW 310 August 1992
[3] DIN EN 10217-7:2015-01, Seite 19 geschweißte VA-Rohre
[4] DIN EN 10216-5:22014-03 Seite 17 nahtlose VA-Rohre
[5] AD 2000-Merkblatt W4 Tafel A2, Wanddicke < 16 [mm]