Kalkulator memberikan ukuran minimum las fillet untuk masukan Anda; lihat AWS D1.1:2025 Tabel 7.7 untuk tabel lengkap.
Source: D1.1:2025 Table 7.7 — Note (a): for non-low-H processes without Clause 6.8.4 preheat, size governs by thicker part and single pass is required. Note (b): weld size need not exceed thickness of thinner part. Note (c): for cyclically loaded structures, 3/16 in [5 mm] is the minimum floor; thicker Table 7.7 rows still govern when larger.
Ketebalan mana yang berlaku tergantung pada Proses Pengelasan dan prosedur Preheat Anda — D1.1:2025 Tabel 7.7 catatan kaki (a). Clause 6.8.4 = prosedur Preheat yang memenuhi syarat, bukan hanya menggunakan Preheat.
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Reference tool only. Verify against your WPS, contract documents, and the governing D1.1 edition before fabrication or inspection acceptance.
Filler metal selection is an essential variable per ASME Section IXQW-404 — changing to a different F-Number or A-Number classification requires procedure requalification.
Required fillet weld volume also drives shop productivity — the weld deposition rate for your wire and parameters tells you how many pounds of weld metal you can lay per hour, which sets the labor cost per joint.
Per AWS A2.4 §8.2.1, the leg size determined here is the number drawn to the left of the fillet weld symbol on the welder's print — the same dimension the inspector verifies with a fillet weld gauge.
For weld-thermal control during fabrication, the heat input calculator translates your voltage, amperage, and travel speed into the kJ/in (or kJ/mm) value engineers cite when restricting heat on Q&T steels per D1.1 Clause 7.7.
D1.1 Pasal 7.13 merujuk ukuran las fillet minimum ke Tabel 7.7. Tabel ini bergantung pada proses: pengelasan bukan hidrogen rendah tanpa prosedur prapemanasan terkualifikasi sesuai 6.8.4 menggunakan bagian yang lebih tebal, sedangkan pengelasan hidrogen rendah dan prosedur pencegahan retak terkualifikasi menggunakan bagian yang lebih tipis.
AWS D1.1:2025 Clause 7.13 and Table 7.7 footnote (a)
Common Questions
FAQ
Berapa Ukuran Las Fillet Minimum per D1.1?
Kalkulator memberikan ukuran minimum las fillet untuk masukan Anda; lihat AWS D1.1:2025 Tabel 7.7 untuk tabel lengkap.
Apakah Ukuran Las Fillet tergantung pada pelat yang lebih tipis atau lebih tebal?
Ini tergantung pada Proses Pengelasan Anda per Tabel 7.7 catatan kaki (a). Untuk Proses Pengelasan Hidrogen Rendah (E7018, GMAW, FCAW, SAW), T sama dengan Ketebalan bagian yang lebih tipis yang disambung. Untuk Proses Pengelasan Bukan Hidrogen Rendah (E6010, E6011) tanpa prosedur Preheat Clause 6.8.4 yang memenuhi syarat, T sama dengan Ketebalan bagian yang lebih tebal yang disambung. Perbedaan ini penting karena pengaturan oleh pelat yang lebih tebal menghasilkan Ukuran Las Fillet Minimum yang lebih besar. Catatan kaki (b) menambahkan batasan praktis: Ukuran Las Fillet yang diperlukan tidak perlu melebihi Ketebalan bagian yang lebih tipis.
Bisakah Anda menggunakan Las Fillet yang lebih kecil dari Minimum Tabel 7.7?
Generally no — Table 7.7 minimums are mandatory. The only code-permitted reduction is footnote (b), which states the weld size need not exceed the thickness of the thinner part joined. Note that when using non-low-hydrogen processes (E6010, E6011) without a qualified Clause 6.8.4 preheat procedure, the governing thickness is the thicker part and single-pass welds are required per footnote (a) — this typically results in a larger minimum size compared to low-hydrogen processes where the thinner part governs. Using a weld smaller than the applicable minimum is a code violation that would be rejected during visual inspection per Table 8.1 item (6) Undersized Fillet Welds and Clause 8.9. The Engineer may approve alternative sizes through WPS qualification per Clause 6, but this is uncommon for standard fillet welds.
What is the difference between fillet weld leg size and throat size?
Leg size is the distance from the weld root to the toe along either face of the joint. For an equal-leg fillet weld, both legs are the same dimension, and this is the number specified on the welding symbol per A2.4. Throat size is the shortest distance from the root to the face of the weld — for a flat or slightly convex equal-leg fillet at a 90-degree joint angle, the theoretical throat equals leg size multiplied by 0.707. D1.1 Table 7.7 specifies minimum leg size, not throat size. However, effective throat is what carries the load in design calculations per Clause 4.5.2.6. For deep-penetration GMAW or SAW processes, engineers may increase the effective throat beyond the theoretical value using the provisions in Clause 4.5.2.6, which addresses throat calculations for various joint geometries.
Kapan Las Fillet lintasan tunggal diperlukan?
Table 7.7 footnote (a) governs when single-pass fillet welds are required. For non-low-hydrogen processes (E6010, E6011) without a qualified Clause 6.8.4 preheat procedure, single-pass welds are mandatory at all thickness ranges — this is not optional. For low-hydrogen processes (E7018, GMAW, FCAW, SAW), the single-pass requirement does not apply, and multi-pass welds are permitted at any size. Footnote (a) makes no reference to welding position — the single-pass requirement applies regardless of whether the weld is in the flat, horizontal, vertical, or overhead position. For larger fillets, multiple passes are typical to avoid lack of fusion at the root, excessive convexity, and poor toe tie-in — all rejectable conditions under Table 8.1.
Berdasarkan AWS D1.1:2025 Tabel 7.7 catatan kaki (a), ketebalan yang menentukan bergantung pada proses. Pengelasan bukan hidrogen rendah tanpa prapemanasan sesuai Pasal 6.8.4 menggunakan bagian yang lebih tebal yang disambung; pengelasan hidrogen rendah dan prosedur pencegahan retak terkualifikasi menggunakan bagian yang lebih tipis yang disambung. Catatan kaki (b) menyatakan bahwa ukuran las tidak perlu melebihi ketebalan bagian yang lebih tipis yang disambung.