GradeMaterial NoChemical composition %Tensile kgf/mm²Elongation %Remaining TestFlattening Test
CSiMnPSCrMoB
Carbon Steel TubesSTKM 11A0.12 max0.35 max0.60 max0.04 max0.04 max_________>30>35D ≧ 1.3 DD ≧ 1/2 D
STKM 12A0.20 max0.35 max0.60 max>35>35D ≧ 1.2 DD ≧ 2/3 D
STKM 12B>40>25D ≧ 1.2 DD ≧ 2/3 D
STKM 12C>48>20______
STKM 13A0.25 max0.35 max0.30-0.90>38>30D ≧ 1.2 DD ≧ 2/3 D
STKM 13B>45>20D ≧ 1.2 DD ≧ 3/4 D
STKM 13C>52>15______
STKM 14A0.30 max0.35 max0.30-1.00>42>25D ≧ 1.2 DD ≧ 3/4 D
STKM 14B>51>15D ≧ 1.1 DD ≧ 7/8 D
STKM 15A0.25-0.350.40 max0.30-1.00>48>22D ≧ 1.2 DD ≧ 3/4 D
STKM 16A0.35-0.450.40 max0.40-1.00>52>20D ≧ 1.1 DD ≧ 7/8 D
STKM 17A0.45-0.550.35 max0.40-1.00>56>20D ≧ 1.1 DD ≧ 7/8 D
STKM 18A0.18 max0.55 max1.50 max>45>25D ≧ 1.1 DD ≧ 7/8 D
STKM 19A0.25 max0.55 max1.50 max>50>23D ≧ 1.1 DD ≧ 7/8 D
STKM 20A0.25 max0.55 max1.60 max>55>23D ≧ 1.1 DD ≧ 7/8 D
Door Impact BarSTAM 6900.25 max0.35 max0.60-1.800.04 max0.04 max_________>71>15___D ≧ 7/8 D
STAM 7800.25 max0.35 max0.60-1.80___>80>15___D ≧ 7/8 D
STAM 14700.30 max0.55 max0.30-2.000.40 max___0.0005~0.003>150>5______
STAM 15700.30 max0.55 max0.30-2.00>160>5______
GradeMaterial NoChemical composition %Tensile kgf/mm²Elongation %Remaining TestFlattening Test
CSiMnPSCrMo
Cro-Moly TubesSCM415AP0.13-0.180.15-0.350.60-0.850.03 max0.03 max0.90-1.200.15-0.30>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>65>10D ≧ 1.1 DD ≧ 7/8 D
SCM430AP0.28-0.330.15-0.35>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>70>8D ≧ 1.1 DD ≧ 7/8 D
SCM435AP0.33-0.380.15-0.35>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>70>7D ≧ 1.1 DD ≧ 7/8 D
SCM440AP0.38-0.430.15-0.35>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>75>5D ≧ 1.1 DD ≧ 7/8 D
SAE4130AP0.28-0.330.15-0.350.40-0.600.035 max0.04 max0.80-1.100.15-0.25>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>70>8D ≧ 1.1 DD ≧ 7/8 D
SAE4135AP0.32-0.390.15-0.350.65-0.95>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>70>7D ≧ 1.1 DD ≧ 7/8 D
SAE4140AP0.38-0.430.15-0.350.75-1.00>50>25D ≧ 1.2 DD ≧ 1/2 D
NOAP>75>5D ≧ 1.1 DD ≧ 7/8 D
GradeMaterial NoChemical composition %ConditionTensile kgf/mm²Elongation %
SiFeCuMnMgCrZnTiZr
High Impact Aluminium Alloy70050.35 max0.40 max0.10max0.20-0.701.00-1.800.06-0.204.00-5.000.001-0.0060.08-0.20O>25>12
T6>34>10
70460.12 max0.15 max2.00-2.600.10 max1.90-2.600.04 max5.70-6.700.06 max0.08-0.15T651>40>10
70500.12 max0.15 max2.00-2.600.10 max1.90-2.600.04 max5.70-6.700.06 max0.08-0.15T651>55>10
70750.12 max0.15 max2.00-2.600.10 max0.040 max0.04 max0.25 max0.15 max-------O>28>6
T6>54>12
Anti-Corrosion Aluminium Alloy50830.40 max0.40 max0.10 max0.40-0.104.00-4.900.05-0.250.25 max0.15 max-------H112>27>5
H32>30>14
60610.40-0.800.70 max0.15-0.400.15 max0.80-1.200.04-0.350.25 max0.15 max-------O>15>14
T6>26>8
60630.20-0.600.35 max0.10 max0.10 max0.040 max0.10max0.10 max0.10 max-------T4>15>10
T6>21>9
GradeMaterial NoChemical composition %NO AP ConditionAP Condition
AlVONCFeHTensile (Mpa)Elongation ( %)Tensile (Mpa)Elongation ( %)
Titanium Tubes3Al - 2.5V2.50-3.002.50-3.000.12 max0.02 max0.05 max0.03 max0.015 max>895>19>655>29
6Al - 4V5.50-6.753.50-4.500.20 max0.05 max0.10 max0.04 max0.015 max>1035>8>895>10