Steel E100C-K3 PWHT
Heat-treated state
PWHT = post-weld heat treated
Choose when code or thickness requires stress relief; strength drops slightly while toughness and residual-stress state improve.
Values for the PWHT condition
Other E100C-K3 tempers and conditions
E100C-K3 is listed in 2 conditions; see the grade overview at E100C-K3.
- PWHT
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHTThis page Post-weld heat treated | Choose when code or thickness requires stress relief; strength drops slightly while toughness and residual-stress state improve. | 615 | 710 | 23 | 19 HRC | 8 % IACS |
AWDefault As-welded deposit | Default condition for classification testing and for most field welds on Q&T high-strength steel where no PWHT is applied. | 660 | 745 | 20 | 22 HRC | — |
What is E100C-K3 PWHT?
E100C-K3 PWHT is E100C-K3 heat treated to PWHT — choose when code or thickness requires stress relief; strength drops slightly while toughness and residual-stress state improve. E100C-K3 PWHT has a yield strength of 615 MPa (89.2 ksi) and a tensile strength of 710 MPa (103 ksi) — stronger than 77% of steel grades. Elongation at break is 23% and the elastic modulus is 205 GPa (29.7 Msi). E100C-K3 PWHT has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,450°C (2,642 °F). AW is the default condition FabDigit quotes; PWHT is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 150 MPa·√m (136.5 ksi·√in), better than 96% of steel grades
- High strength — 615 MPa (89.2 ksi), better than 77% of steel grades
- Readily welded — 72/100, better than 75% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
E100C-K3 PWHT properties
Typical room-temperature values for E100C-K3 PWHT; 23 are specific to this condition. Other listed values are E100C-K3 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E100C-K3 PWHT has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
E100C-K3 PWHT has a yield strength of 615 MPa (89.2 ksi) and a tensile strength of 710 MPa (103 ksi) — stronger than 77% of steel grades. Elongation at break is 23% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E100C-K3 PWHT is rated for continuous service to 425°C (797 °F). It conducts heat at 41 W/m·K (23.7 BTU/hr·ft·°F), worse than 62% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
E100C-K3 PWHT conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (14/100), better than 70% of steel grades.
Sustainability4
Producing a kilogram of E100C-K3 PWHT takes about 36 MJ of energy and emits 2.6 kg of CO₂ — more than 89% of steel grades. Typical recycled content is 25%.
Manufacturability7
E100C-K3 PWHT's machinability is fair (48/100, worse than 57% of steel grades); weldability very good (72/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E100C-K3 PWHT
Is E100C-K3 easy to machine?
As-deposited weld metal machines like a 700 MPa Q&T alloy steel — carbide tooling, moderate speeds; grind or mill after PWHT for best tool life.
Can E100C-K3 be welded?
Gas-shielded (75-80%Ar/bal CO₂ or 100% CO₂ per classification), DCEP; preheat and interpass control per steel thickness/CE and low-hydrogen practice are mandatory to avoid delayed cracking.
Can E100C-K3 be formed, bent or molded?
Not applicable as a wrought product; joint design should limit restraint and allow multipass bead sequencing to control distortion in high-strength plate.
What surface finishes work on E100C-K3?
Weld caps grind and blend readily; protect with zinc-rich primer, paint or metallizing since the deposit has essentially mild-steel corrosion behaviour.
E100C-K3 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cdeposited weld metal, AWS A5.28 K3 | ≤ 0.15 | 0.06 |
| Mn | 0.75 – 2.25 | 1.5 |
| Si | ≤ 0.8 | 0.45 |
| Ni | 1.25 – 2.6 | 1.9 |
| Cr | ≤ 0.15 | 0.08 |
| Mo | 0.25 – 0.65 | 0.45 |
| V | ≤ 0.05 | 0.01 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
E100C-K3 PWHT — frequently asked
What is E100C-K3 PWHT used for?
E100C-K3 PWHT is typically used for offshore platform structures, high-strength structural steel fabrication, heavy equipment frames and military armor plate. In short: 100 ksi weld deposit; for Q&T structural steels; low-hydrogen composite wire.
What is the yield strength of E100C-K3 PWHT?
E100C-K3 PWHT has a typical yield strength of 615 MPa (89.2 ksi) and a tensile strength of 710 MPa (103 ksi) — stronger than 77% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is E100C-K3 PWHT easy to machine?
Reasonably — machinability is rated fair (48/100, worse than 57% of steel grades). As-deposited weld metal machines like a 700 MPa Q&T alloy steel — carbide tooling, moderate speeds; grind or mill after PWHT for best tool life.
Can E100C-K3 PWHT be welded?
Yes — weldability is rated very good (72/100). Gas-shielded (75-80%Ar/bal CO₂ or 100% CO₂ per classification), DCEP; preheat and interpass control per steel thickness/CE and low-hydrogen practice are mandatory to avoid delayed cracking.
What surface finishes work on E100C-K3 PWHT?
Weld caps grind and blend readily; protect with zinc-rich primer, paint or metallizing since the deposit has essentially mild-steel corrosion behaviour.
Can E100C-K3 PWHT be formed, bent or molded?
Not applicable as a wrought product; joint design should limit restraint and allow multipass bead sequencing to control distortion in high-strength plate.
What is the maximum service temperature of E100C-K3 PWHT?
E100C-K3 PWHT is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between E100C-K3-AW and E100C-K3 PWHT?
AW is the default condition — default condition for classification testing and for most field welds on Q&T high-strength steel where no PWHT is applied. PWHT: choose when code or thickness requires stress relief; strength drops slightly while toughness and residual-stress state improve. Yield strength is 660 MPa in AW versus 615 MPa in PWHT.
Sources
- AWS A5.28/A5.28M — Low-Alloy Steel Electrodes and Rods for Gas Shielded Arc Welding — American Welding Society (2020)
- AWS D1.1/D1.1M Structural Welding Code — Steel — American Welding Society (2020)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Metal-cored 100 ksi low-alloy wire datasheets (Lincoln Electric, ESAB, Kobelco) — various producers (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.