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Boiler tubes, heat exchanger tubes

Welded pipes

L, LL, KLM finned tubes (finned tubes)

G embedded fin tubes (finned tubes)

(serrated) extruded finned tubes

high frequency welded (serrated) fin tubes (finned tubes)

Laser welded fin tubes (finned tubes)

hot dipped galvanized oval (elliptical) finned tubes, rectangular fin tubes

condenser fin flat tubes

inner finned tubes (finned tubes)

Studded Pipes

H / double H fin tubes (finned tubes)

longitudinal fin tubes (finned tubes)

Tube finning machine

Aluminum plates, strips,foils

Aluminum welding wire rod

Aluminum tubes, profile

Economizer for Boiler

air-cooled heat exchanger (air cooler)

seamless fin tubes with two longitudinal opposite fins

material

cast pipes

standard & specification

 
 
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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