Germany · DIN

WStE 420

DIN 17179:1986 — Seamless circular tubes of fine grain steels for special requirements; technical delivery conditions

Chemical composition

wt% · log scale
0.010.1110Al0.02C0.2Cr0.3Cu0.2Mn1 – 1.7Mo0.1N0.02Nb0.05Nb+Ti+V0.22Ni1P0.035S0.03Si0.1 – 0.6V0.2
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥410 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥31 JElongation A≥19 %Yield strength Rp0.2≥410 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥55 JElongation A≥21 %Seamless tubes, 12 < d <= 20 mmYield strength Rp0.2≥400 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥31 JElongation A≥19 %Yield strength Rp0.2≥400 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥55 JElongation A≥21 %Seamless tubes, 20 < d <= 40 mmYield strength Rp0.2≥385 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥31 JElongation A≥19 %Yield strength Rp0.2≥385 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥55 JElongation A≥21 %Seamless tubes, 40 < d <= 50 mmYield strength Rp0.2≥375 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥31 JElongation A≥19 %Yield strength Rp0.2≥375 MPaTensile strength Rm530–680 MPaImpact energy Kv/Ku≥55 JElongation A≥21 %Seamless tubes, 50 < d <= 65 mm

Chemical composition

ElementminmaxSimilarRemarks
Al0.02If nitrogen is additionally fixed by niobiumIf nitrogen is additionally fixed by niobium
C0.2
Cr0.3
Cu0.2The value for Copper may be at max0The value for Copper may be at max0
Mn11.7
Mo0.1
N0.02
Nb0.05
Nb+Ti+V0.22
Ni1
P0.035
S0.03
Si0.10.6
TiThe value for Ti may be at max0The value for Ti may be at max0
V0.2

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
Seamless tubes, 12 < d <= 20 mm≥410530–680≥19；≥21≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, 20 < d <= 40 mm≥400530–680≥19；≥21≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, 40 < d <= 50 mm≥385530–680≥19；≥21≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, 50 < d <= 65 mm≥375530–680≥19；≥21≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, t <= 12 mm≥420530–680≥19；≥21≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115