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DIN 17175 Seamless Tubes of Heat-resistant Steel
Grade Chemical composition(%)
C Si Mn P S Cr Mo
St35.8 0.17Max 0.10~0.35 0.40~0.80 0.040Max 0.040Max - -
St45.8 0.21Max 0.10~0.35 0.40~1.20 0.040Max 0.040Max - -
17Mn4 0.14~0.20 0.20~0.40 0.90~1.20 0.040Max 0.040Max 0.30Max -
19Mn5 0.17~0.22 0.30~0.60 1.00~1.30 0.040Max 0.040Max 0.30Max -
15Mo3 0.12~0.20 0.10~0.35 0.40~0.80 0.035Max 0.035Max - 0.25~0.35
13CrMo910 0.10~0.18 0.10~0.35 0.40~0.70 0.035Max 0.035Max 0.70~1.10 0.45~0.65
10CrMo910 0.08~0.15 0.50Max 0.40~0.70 0.035Max 0.035Max 2.00~2.50 0.90~1.20
14MoV63 0.10~0.18 0.10~0.35 0.40~0.70 0.035Max 0.035Max 0.30~0.60 0.50~0.70
X20CrMoV121 0.17~0.23 0.50Max 0.40~0.70 0.030Max 0.030Max 10.00~12.50 0.80~1.20

14MoV63 V : 0.22~0.32
X20CrMoV121 Ni 0.30~0.80V : 0.25~0.35



Grade Materianumber Tensile Test MPa or N/mm2 Remaks(Similar to JIS) Possibility Temperature
Min Yield point Tensile Strength

t16Max

16<t40Max

St35.8 1.0305 235 225 360~480 Impact Test at Room Temp.kgf-m
(STPT38)
 
St45.8 1.0405 - 245 410~530 23.5(STPT410, STB410)  
17Mn4 1.0481 - 275 460~580 22.8  
19Mn5 1.0482 - 315 510~610 23.5(STB52)  
15Mo3 1.5415 275 275 450~600 23.5  
13CrMo910 1.7335 295 295 440~590 23.2(STPA22, STBA22)  
10CrMo910 1.7380 285 285 450~600 23.2(STPA24, STBA24)  
14MoV63 1.7715 325 325 460~610 24.2  
X20CrMoV121 1.4922 490 490 690~850 23.5  
 
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