A4-70 eksportir baut hex stainless steel
XZ Fastener exports A4-70 stainless steel hex bolts for distributors, project contractors, equipment builders, and maintenance buyers who need corrosion-resistant metric hex head bolts with clear order control. These bolts can be supplied as DIN 933 full thread hex bolts, ISO 4017 bolts, DIN 931 partial thread bolts, or drawing-based stainless fasteners according to order requirement. A4-70 is often selected for coastal, outdoor, marine, chemical, and machinery applications where 316-family stainless steel is preferred. Buyers can source baut segi enam baja tahan karat with packing, labeling, inspection, and export document requirements confirmed before shipment.
Standar
DIN 933 / ISO 4017 benang penuh; DIN 931 / ISO 4014 opsional
Kekuatan
A4-70; A4-80 available upon request
Bahan
A4 / 316-family austenitic stainless steel
Selesai
Biasa, dipasivasi, diasamkan dan dipasivasi, dilumasi
Aplikasi
Marine fittings, outdoor structures, machinery, chemical equipment
Yang Harus Diketahui Pembeli Sebelum Membeli Baut heksagonal Stainless Steel A4-70
A4-70 stainless hex bolts are not simply “silver bolts.” They should be specified by standard, diameter, length, thread type, material group, property class, finish, quantity, and packing method. For export orders, carton labeling, pallet dimensions, shipping marks, and inspection documents should also be confirmed before production.
Confirm full thread or partial thread
DIN 933 and ISO 4017 are normally used for full thread hex bolts, while DIN 931 and ISO 4014 are used for partial thread hex bolts. XZ Fastener also supplies Baut kepala segi enam A2 dan A4 when buyers need mixed standards in one shipment.
Do not compare only by price per piece
Stainless grade, thread length, finish, inspection documents, sorting level, and export packaging can all affect cost. A low unit price may not include the documentation or packing required for project receiving.
Match the bolt to the environment
A4-70 is commonly chosen for corrosion resistance. For dry indoor work, carbon steel may be more economical; for coastal, wet, chloride, or chemical exposure, A4 stainless is often the safer purchasing choice.
Deskripsi Pembelian Umum
Clear purchasing language helps the exporter prepare the correct quotation, inspection plan, and packing proposal. Common descriptions include:
- A4-70 stainless steel hex bolts DIN 933 full thread, M10 x 40, plain finish, export carton packing.
- 316 stainless steel ISO 4017 metric hex head bolts, A4-70, passivated, with matching nuts and washers.
- DIN 931 A4-70 partial thread hex bolts for outdoor equipment assembly.
- Stainless steel hex cap screws M6-M24, A4-70, with material test certificate available upon request.
- Carbon steel alternatives such as Grade 8.8 carbon steel hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts from XZ Fastener’s DIN 933 full thread hex bolt range.
If stainless and carbon steel bolts are combined in one order, each line item should state material, grade, finish, standard, and packing requirement separately.
Tabel Spesifikasi Detail
| Barang | Spesifikasi | Ekspor Catatan Pembelian |
|---|---|---|
| Nama produk | Baut segi enam baja tahan karat A4-70 | Can be supplied as bolts only or with matching stainless nuts and washers. |
| Standar | DIN 933, ISO 4017, DIN 931, ISO 4014, komponen berbasis gambar | Confirm whether full thread or partial thread is required. |
| Kisaran diameter | Common metric sizes such as M3-M36; larger sizes according to order review | Availability depends on standard, length, and production method. |
| Panjangnya | Panjang standar atau panjang custom sesuai gambar | Use this pemandu panjang ulir baut when checking full thread and half thread requirements. |
| Benang | Benang metrik kasar; nada halus tersedia berdasarkan permintaan | Provide pitch if the item is not standard coarse thread. |
| Bahan | A4 / 316-family austenitic stainless steel | Material documents can be discussed before order confirmation. |
| Kelas properti | A4-70 di bawah referensi ISO 3506 | A4-80 can be reviewed when higher stainless strength is needed. |
| Selesai | Polos, dipasivasi, diasamkan dan dipasivasi, dipoles, dilumasi | Hasil akhir harus sesuai dengan paparan korosi dan metode perakitan. |
| Inspeksi | Dimensions, thread gauges, visual appearance, material documents, mechanical reports upon request | State third-party inspection or special reports before production. |
| Ekspor kemasan | Bulk cartons, small boxes, pallet packing, labels, barcodes, shipping marks | Pengepakan dapat diatur sesuai tujuan dan kebutuhan pesanan. |
Penjelasan Materi dan Kelas
A4 stainless steel is a molybdenum-bearing austenitic stainless group widely used where chloride exposure, outdoor moisture, or chemical environments may attack ordinary carbon steel. A4-70 identifies both the stainless group and the mechanical property class, commonly associated with a minimum tensile strength level of 700 MPa under ISO 3506 reference conditions.
For importers and project buyers, A2 and A4 should not be treated as the same material. A2 is suitable for many indoor and mild outdoor applications, while A4 is normally preferred for marine air, coastal structures, chemical equipment, wastewater facilities, and outdoor exposed assemblies. XZ Fastener provides a practical guide on Pengencang baja tahan karat A2 vs A4 for material comparison.
A4-70 also differs from Grade 8.8 carbon steel hex bolts. Grade 8.8 carbon steel is often chosen for higher tensile strength, while A4-70 stainless steel is chosen for corrosion resistance and long service life in suitable environments.
Inspection details can be aligned with the purchase order, including dimensions, thread fit, surface condition, quantity, and documents.
Panduan Pemilihan Permukaan Akhir
A4-70 stainless steel hex bolts are usually exported in plain stainless or passivated finish. Passivation supports a cleaner stainless surface by helping remove free iron contamination. Pickling and passivation may be requested when stronger surface cleaning is required. Lubrication or anti-seize preparation may be discussed where thread galling is a concern.
| Selesai | Penggunaan Khas | Catatan Pembeli |
|---|---|---|
| tahan karat polos | General machinery, indoor assemblies, replacement parts | Common and economical for standard stainless bolt orders. |
| Pasif | Outdoor, coastal, marine air, chemical equipment | Often requested for cleaner surface and improved stainless performance. |
| Acar dan dipasivasi | Persyaratan pembersihan permukaan tahan karat yang lebih menuntut | Confirm appearance expectations and acceptance criteria in advance. |
| Dilumasi | Assemblies with galling risk or repeated tightening | Perilaku torsi berubah ketika pelumasan digunakan. |
| Pelapis baja karbon | Baut DIN 933 berlapis seng, baut DIN 933 oksida hitam, baut DIN 933 galvanis hot dip | These are generally selected for carbon steel fasteners, not standard A4 stainless bolts. |
For broader coating comparisons, see XZ Fastener’s panduan penyelesaian pengikat.
Manufaktur dan Kontrol Kualitas
Export supply begins with a confirmed size list, standard, material grade, finish, packing method, destination requirement, and document requirement. Depending on diameter and length, A4-70 stainless steel hex bolts can be produced by cold heading, hot forging, machining, thread rolling, or thread cutting.
Order review
XZ Fastener checks the standard, size, thread, finish, tolerance, quantity, shipping marks, and inspection requirements before confirming production. Buyers can also browse broader produk pengikat for matching nuts, washers, threaded rods, anchors, and screws.
Pengendalian produksi
Common control points include head dimensions, across-flat size, thread length, thread gauge fit, surface appearance, burr control, grade separation, and packing quantity.
Export preparation
Carton labels, pallet marks, packing lists, and requested inspection documents are prepared according to order requirement. For special sizes or drawing-based parts, pengencang khusus can be reviewed before quotation.
Aplikasi
A4-70 stainless steel hex bolts are widely exported for projects and stock programs where corrosion resistance, standard metric dimensions, and wrench-friendly assembly are important.
- Peralatan kelautan dan fasilitas pesisir
- Peralatan pemrosesan kimia
- Rakitan baja dan aluminium luar ruangan
- Sistem pengolahan air limbah
- Perangkat keras pendukung pompa, katup, dan pipa
- Struktur pendukung makanan dan minuman
- Solar mounting and exposed frames
- Perawatan mesin dan penggantian suku cadang
For submerged seawater, high-temperature equipment, strong chloride chemicals, or critical load-bearing assemblies, engineering confirmation is recommended before selecting A4-70.
Cara Mendapatkan Penawaran Lebih Cepat
A clear inquiry helps XZ Fastener quote the correct A4-70 stainless steel hex bolts and export packing without repeated clarification. Please provide:
- Size list, such as M6 x 20, M8 x 30, M10 x 50, M12 x 80.
- Standar, seperti DIN 933, ISO 4017, DIN 931, ISO 4014, atau nomor gambar.
- Bahan dan kualitasnya, seperti baja tahan karat A4-70, A4-80, A2-70, atau 316.
- Persyaratan akhir, seperti polos, dipasivasi, diasamkan dan dipasivasi, atau dilumasi.
- Kuantitas untuk setiap ukuran dan jadwal pengiriman yang diharapkan.
- Packaging requirement, including bulk carton, small box, pallet, label, barcode, or private packing.
- Inspection requirements, such as material certificate, dimensional report, visual inspection, or third-party inspection.
- Destination port, delivery term, and any shipping mark requirements.
Untuk penyelidikan terstruktur, gunakan meminta penawaran halaman atau hubungi XZ Fastener dengan gambar, foto, atau spreadsheet.
FAQ
Is A4-70 suitable for marine environments?
A4-70 is commonly selected for marine air, coastal equipment, and outdoor chloride exposure because it belongs to the 316-family stainless group. For submerged seawater or highly aggressive chemical exposure, the application should be checked before order confirmation.
Apa perbedaan antara DIN 933 dan ISO 4017?
Both are commonly used for full thread hex bolts, but they are different standards with dimensional details that should be confirmed in the purchase order. Buyers should state the required standard clearly instead of only writing “hex bolt.”
Dapatkah baut hex baja tahan karat A4-70 menggantikan baut hex baja karbon Grade 8.8?
Not automatically. A4-70 stainless bolts are selected mainly for corrosion resistance, while Grade 8.8 carbon steel hex bolts are selected for higher strength. Joint load, environment, and assembly requirement should be reviewed before substitution.
Can XZ Fastener export matching nuts and washers with the bolts?
Yes. Matching stainless hex nuts, flat washers, spring washers, and assembled packing can be supplied according to the bolt standard, thread, material, and project requirement.
What export packing options are available?
Bolts can be packed in bulk cartons, small boxes, plastic bags, palletized cartons, or buyer-specified packing with labels, barcodes, and shipping marks according to order requirement.
Dokumen apa yang bisa diminta sebelum pengiriman?
Buyers may request material test certificates, dimensional inspection reports, packing lists, visual inspection records, and other documents according to order requirement. Document needs should be confirmed before production.
Can custom A4-70 hex bolts be supplied from drawings?
Custom length, special thread pitch, modified head dimensions, special marking, and non-standard packaging can be reviewed from drawings, samples, photos, quantity, and application details.
Kirim Permintaan Baut heksagonal Stainless A4-70 Anda
Send your size list, finish, quantity, packaging method, and inspection requirements. Include the standard or drawing number, destination port, delivery term, and whether matching nuts and washers are needed. XZ Fastener will review the details and prepare a quotation according to your order requirement.
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