A4-70 فولاذ مقاوم للصدأ مسامير سداسية مصدر
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 فولاذ مقاوم للصدأ مسامير سداسية with packing, labeling, inspection, and export document requirements confirmed before shipment.
قياسي
DIN 933 / ISO 4017 خيط كامل؛ DIN 931 / ISO 4014 اختياري
القوة
A4-70; A4-80 متاح عند الطلب
مادة
A4 / 316-العائلة الأوستنيتي فولاذ مقاوم للصدأ
إنهاء
عادي، تخميل، مخلل، تخميل، مشحم
التطبيق
Marine fittings, outdoor structures, machinery, chemical equipment
ما يجب أن يعرفه المشترون قبل شراء مسامير سداسية من الفولاذ المقاوم للصدأ مقاس 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 A2 وA4 مسامير سداسية الرأس 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.
أوصاف الشراء الشائعة
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 فولاذ مقاوم للصدأ ISO 4017 متري مسامير سداسية الرأس، A4-70، مع صواميل وغسالات متطابقة.
- 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 مجموعة DIN 933 ذات خيط كامل مسمار سداسي.
If stainless and carbon steel bolts are combined in one order, each line item should state material, grade, finish, standard, and packing requirement separately.
جدول المواصفات التفصيلية
| البند | المواصفات | تصدير ملاحظات الشراء |
|---|---|---|
| اسم المنتج | A4-70 فولاذ مقاوم للصدأ مسامير سداسية | Can be supplied as bolts only or with matching stainless nuts and washers. |
| المعايير | DIN 933، ISO 4017، DIN 931، ISO 4014، الأجزاء القائمة على الرسم | Confirm whether full thread or partial thread is required. |
| نطاق القطر | Common metric sizes such as M3-M36; larger sizes according to order review | Availability depends on standard, length, and production method. |
| الطول | أطوال قياسية أو أطوال مخصصة حسب الرسومات | استخدم هذا دليل طول موضوع الترباس when checking full thread and half thread requirements. |
| الموضوع | متري قلاوظ خشن. الملعب الجيد متاح عند الطلب | Provide pitch if the item is not standard coarse thread. |
| مادة | A4 / 316-العائلة الأوستنيتي فولاذ مقاوم للصدأ | يمكن مناقشة المستندات المادية قبل تأكيد الطلب. |
| فئة الملكية | A4-70 ضمن مرجع ISO 3506 | A4-80 can be reviewed when higher stainless strength is needed. |
| إنهاء | عادي، تخميل، مخلل، تخميل، مصقول، مشحم | يجب أن يتطابق التشطيب مع التعرض للتآكل وطريقة التجميع. |
| التفتيش | الأبعاد ومقاييس الخيوط والمظهر المرئي ومستندات المواد والتقارير الميكانيكية عند الطلب | State third-party inspection or special reports before production. |
| تعبئة الصادرات | Bulk cartons, small boxes, pallet packing, labels, barcodes, shipping marks | يمكن ترتيب التعبئة وفقًا للوجهة ومتطلبات الطلب. |
شرح المواد والصف
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 السحابات A2 مقابل A4 فولاذ مقاوم للصدأ 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.
دليل اختيار تشطيب السطح
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.
| إنهاء | الاستخدام النموذجي | ملاحظة المشتري |
|---|---|---|
| عادي غير القابل للصدأ | General machinery, indoor assemblies, replacement parts | Common and economical for standard stainless bolt orders. |
| تخميلها | Outdoor, coastal, marine air, chemical equipment | Often requested for cleaner surface and improved stainless performance. |
| مخلل ومخمول | متطلبات تنظيف الأسطح غير القابل للصدأ أكثر تطلبًا | Confirm appearance expectations and acceptance criteria in advance. |
| مشحم | Assemblies with galling risk or repeated tightening | يتغير سلوك عزم الدوران عند استخدام التشحيم. |
| الطلاءات فولاذ كربوني | مطلي بالزنك DIN 933 مسامير، أكسيد أسود DIN 933 مسامير، مجلفن بالغمس الساخن DIN 933 مسامير | These are generally selected for carbon steel fasteners, not standard A4 stainless bolts. |
For broader coating comparisons, see XZ Fastener’s دليل النهاية السحابة.
التصنيع ومراقبة الجودة
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.
مراجعة الطلب
XZ Fastener checks the standard, size, thread, finish, tolerance, quantity, shipping marks, and inspection requirements before confirming production. Buyers can also browse broader منتجات السحابة لمطابقة الصواميل والغسالات وقضبان ملولبة والمثبتات والمسامير.
مراقبة الإنتاج
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, السحابات المخصصة can be reviewed before quotation.
التطبيقات
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.
- المعدات البحرية والمرافق الساحلية
- معدات المعالجة الكيميائية
- تركيبات خارجية من الصلب والألومنيوم
- أنظمة معالجة مياه الصرف الصحي
- أجهزة دعم المضخة والصمام والأنابيب
- هياكل دعم الأغذية والمشروبات
- Solar mounting and exposed frames
- صيانة الآلات وقطع الغيار
For submerged seawater, high-temperature equipment, strong chloride chemicals, or critical load-bearing assemblies, engineering confirmation is recommended before selecting A4-70.
كيفية الحصول على عرض أسعار أسرع
A clear inquiry helps XZ Fastener quote the correct A4-70 stainless steel hex bolts and export packing without repeated clarification. Please provide:
- قائمة الحجم، مثل M6 x 20، M8 x 30، M10 x 50، M12 x 80.
- قياسي، مثل DIN 933، أو ISO 4017، أو DIN 931، أو ISO 4014، أو رقم الرسم.
- المواد والدرجة، مثل A4-70، أو A4-80، أو A2-70، أو 316 فولاذ مقاوم للصدأ.
- متطلبات الانتهاء، مثل عادي، تخميلها، مخلل وتخميلها، أو مشحم.
- الكمية لكل حجم وجدول التسليم المتوقع.
- Packaging requirement, including bulk carton, small box, pallet, label, barcode, or private packing.
- متطلبات الفحص، مثل شهادة المواد أو تقرير الأبعاد أو الفحص البصري أو التفتيش من طرف ثالث.
- Destination port, delivery term, and any shipping mark requirements.
للحصول على استفسار منظم، استخدم طلب عرض أسعار صفحة أو اتصل بـ XZ Fastener بالرسومات أو الصور أو جداول البيانات.
الأسئلة الشائعة
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.
ما الفرق بين DIN 933 وISO 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.”
هل يمكن لـ A4-70 فولاذ مقاوم للصدأ مسامير سداسية استبدال الدرجة 8.8 فولاذ كربوني مسامير سداسية؟
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.
ما هي خيارات التعبئة التصدير المتاحة؟
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.
ما هي المستندات التي يمكن طلبها قبل الشحن؟
يمكن للمشترين طلب شهادات اختبار المواد وتقارير فحص الأبعاد وقوائم التعبئة وسجلات الفحص البصري وغيرها من المستندات وفقًا لمتطلبات الطلب. يجب تأكيد احتياجات الوثيقة قبل الإنتاج.
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.
أرسل استفسارك A4-70 ستانلس مسمار سداسي
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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