Products
Steel Grades 1Steel Grades 2Steel Grades 3
| Steel Grades | Supplementary Requirement | Thickness (mm) | Chemical Composition | Mechanical Properties | ||
| API-2H-50 | CTOD non-guarantee |
20 ~ 63t | Ceq ≤ 0.43 Pcm ≤ 0.27 |
Tensile Test | YS(MPa) | 345 – 420 |
| TS(MPa) | 490 – 620 | |||||
| EL(%), GL50 | 23 | |||||
| YR(%) | ≤ 80 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 50 | |||||
| API-2W-50 | CTOD non-guarantee |
25 ~ 75t | Ceq ≤ 0.36 Pcm ≤ 0.27 |
Tensile Test | YS(MPa) | 345 – 483 |
| TS(MPa) | 485 – 630 | |||||
| EL(%), GL50 | 23 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 50 | |||||
| API-2W-60 | CTOD non-guarantee |
25 ~ 75t | Ceq ≤ 0.41 Pcm ≤ 0.20 |
Tensile Test | YS(MPa) | 414 – 586 |
| TS(MPa) | 517 – 660 | |||||
| EL(%), GL50 | 22 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 80 | |||||
| API-2W-50 | CTOD (-10°C) |
25 ~ 75t | Ceq ≤ 0.39 Pcm ≤ 0.19 |
Tensile Test | YS(MPa) | 345 – 483 |
| TS(MPa) | 485 – 630 | |||||
| EL(%), GL50 | 23 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 50 | |||||
Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
Pcm = C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B
*Supply by POSCO
| Steel Grades | Supplementary Requirement | Thickness (mm) | Chemical Composition | Mechanical Properties | ||
| API-2W-60 | CTOD (-10°C) |
25 ~ 75t | Ceq ≤ 0.42 Pcm ≤ 0.21 |
Tensile Test | YS(MPa) | 414 – 586 |
| TS(MPa) | 520 – 665 | |||||
| EL(%), GL50 | 22 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 60 | |||||
| EN-S355G8+M | CTOD non-guarantee |
25 ~ 75t | Ceq ≤ 0.36 Pcm ≤ 0.19 |
Tensile Test | YS(MPa) | 345 – 520 |
| TS(MPa) | 480 – 620 | |||||
| EL(%), GL50 | 22 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 50 | |||||
| BN-S355ML | CTOD non-guarantee |
25 ~ 75t | Ceq ≤ 0.36 Pcm ≤ 0.19 |
Tensile Test | YS(MPa) | 345 – 520 |
| TS(MPa) | 480 – 620 | |||||
| EL(%), GL50 | 22 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 50 | |||||
| TOTAL S355KT-40 | CTOD non-guarantee |
25 ~ 75t | Ceq ≤ 0.36 Pcm ≤ 0.19 |
Tensile Test | YS(MPa) | 345 – 520 |
| TS(MPa) | 485 – 620 | |||||
| EL(%), GL50 | 22 | |||||
| YR(%) | ≤ 90 | |||||
| Charpy Test (J) (-40°C, Transverse) | ≥ 60 | |||||
Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
Pcm = C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B
*Supply by POSCO
| Supplementary Requirement | CTOS(-10°C) | Non-CTOD | |||
| YS355-TM | YS420-TM | YS355-TM | YS420-TM | YS355-N | |
| S1: UT(ASTM A578 Level C) | Available | Available | Available | Available | Available |
| S2: Impact Test at Low Temp (-60°C) | Available | Available | Available | Available | Available |
| S3: Additional Tension Test | Available | Available | Available | Available | Available |
| S4: Through Thickness Test | Min 35% | Min 35% | Min 35% | Min 35% | Min 35% |
| S5: Low Sulfur (Max 0.006%) | Max 0.005 | Max 0.005 | Max 0.005 | Max 0.005 | Max 0.005 |
| S7: Low Nitrogen (max 0.0009%) | Max 0.007 | Max 0.007 | Max 0.007 | Max 0.007 | Max 0.007 |
| S8: Strain-AGed Impact Test (250°C, 1 Hour, Strain: 5%) | Available | Available | Available | Available | Available |
| S9: PWHT (600±20°C, 240 minutes) | Available | Available | Available | Available | Available |
| S11: Pre-Qualification (CTOD) | Max 90t | Max 100t | – | – | – |
| S12: Drop-Weight Test (-35°C) | Available | Available | Available | Available | – |
| S91: Fine Austenitic Grain Size | Grain Size Index above “7”(ASTM E112) | ||||
*Please made contact with us for details before ordering supplementary equipment
*Supply by POSCO
