---
title: "A4 (316) Stainless Steel Weld Studs (CD and Drawn-Arc)"
description: "A4 (316) Stainless Steel Weld Studs (CD and Drawn-Arc) (ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80): superior, including marine and chloride"
url: https://engineeringhardware.com/guide/material/a4-stainless-steel-weld-studs-iso-13918/
source: Engineering Hardware & Fasteners
---

# A4 (316) Stainless Steel Weld Studs (CD and Drawn-Arc)

Bolts · ISO 13918

Mechanical properties, corrosion behaviour and the full dimensional range for this grade.

A4 Stainless Steel Weld Studs (CD and Drawn-Arc) are supplied to ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80. Corrosion behaviour is superior, including marine and chloride environments, the material is largely non-magnetic, and the usable service range is approx. -200 °C to +400 °C, subject to the property class and the joint. In practice this grade is specified for marine, coastal and chemical applications.

- **Grade:** ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80
- **Corrosion resistance:** Superior, including marine and chloride environments
- **Magnetic response:** Largely non-magnetic
- **Service temperature:** approx. -200 °C to +400 °C, subject to the property class and the joint

Property values are typical for the grade. Certified mechanical test data is available on request for production orders.

![A4 (316) Stainless Steel Weld Studs (CD and Drawn-Arc) reference image](https://engineeringhardware.com/wp-content/uploads/2026/09/Weld-Studs.webp)

Weld Studs (CD and Drawn-Arc) manufactured in A4 Stainless Steel (ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80) are dimensioned to ISO 13918. The sections below give the mechanical and physical properties of the grade, its behavior in corrosive and elevated-temperature service, and the full size table.

## Why Choose A4 Stainless Steel for Weld Studs (CD and Drawn-Arc)

Specified for marine, coastal and chemical applications. For weld studs (cd and drawn-arc), this matters when superior, including marine and chloride environments is the primary requirement.

## Mechanical & Physical Properties

| Grade designation | ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80 |
| --- | --- |
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| Corrosion characteristic | Superior, including marine and chloride environments |

## Corrosion Behavior in Service

A4 (316) adds 2–3% molybdenum to the A2 (304) composition, which dramatically improves resistance to chloride-pitting corrosion. For Weld Studs (CD and Drawn-Arc) in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.

## Comparable Grades

For Weld Studs (CD and Drawn-Arc), the alternative stainless grade is A2 (304). The practical dividing line is chlorides: A2 (304) is fine until salt is involved, and A4 (316) exists for the cases where it is — coastal, marine and road-salt service. Neither reaches the strength of a plated class 8.8 or 10.9 fastener.

## Using Stainless Fasteners in Aluminum

The galvanic couple here runs the wrong way: aluminum is the less noble metal, so it corrodes and the fastener does not. What governs the rate is the ratio of areas — a large anode and a small cathode is a tolerable combination, the reverse concentrates the attack into thin material around the hole. An isolating washer plus sealant breaks the circuit; where that is impractical, match the fastener to the substrate.

## Sizes of Weld Studs (CD and Drawn-Arc) Available in A4 Stainless Steel

| Thread size | Length L before weld (mm) | Weld process | Burn-off (mm) | Minimum sheet thickness (mm) | Flange diameter (mm) | Material | Reference standard |
| --- | --- | --- | --- | --- | --- | --- | --- |
| M3 | 8 | CD (type PT) | 0.5 | 0.6 | — | Mild steel / A2 | ISO 13918 |
| M4 | 10 | CD (type PT) | 0.5 | 0.7 | — | Mild steel / A2 | ISO 13918 |
| M5 | 16 | CD (type PT) | 0.5 | 0.8 | — | Mild steel / A2 | ISO 13918 |
| M6 | 20 | CD (type PT) | 0.5 | 1.0 | — | Mild steel / A2 | ISO 13918 |
| M8 | 25 | Drawn-arc (type PD) | 4.0 | 2.0 | 13.0 | Mild steel | ISO 13918 |
| M10 | 30 | Drawn-arc (type PD) | 4.0 | 2.5 | 16.0 | Mild steel | ISO 13918 |
| M12 | 40 | Drawn-arc (type PD) | 5.0 | 3.0 | 19.0 | Mild steel | ISO 13918 |

Dimensions are independent of the material: every size above is available in A4 Stainless Steel.

Custom manufacturing · Made to drawing

## Need this bolt in a grade that is not listed?

A4 Stainless Steel is one of the grades the catalog describes. A non-standard bolt is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by cold heading or hot forging.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

[Custom bolt manufacturing](https://engineeringhardware.com/custom/bolts/)[Send a drawing](https://engineeringhardware.com/custom/bolts/#rfq)

## Technical Drawing

Dimensioned line drawing of M3 Weld Studs (CD and Drawn-Arc) to ISO 13918. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Length L before weld (mm):** 8
- **Weld process:** CD (type PT)
- **Burn-off (mm):** 0.5
- **Minimum sheet thickness (mm):** 0.6
- **Flange diameter (mm):** —
- **Material:** Mild steel / A2

## Dimensions & Specifications (ISO 13918)

| Thread size | Length L before weld (mm) | Weld process | Burn-off (mm) | Minimum sheet thickness (mm) | Flange diameter (mm) | Material | Reference standard |
| --- | --- | --- | --- | --- | --- | --- | --- |
| M3 | 8 | CD (type PT) | 0.5 | 0.6 | — | Mild steel / A2 | ISO 13918 |
| M4 | 10 | CD (type PT) | 0.5 | 0.7 | — | Mild steel / A2 | ISO 13918 |
| M5 | 16 | CD (type PT) | 0.5 | 0.8 | — | Mild steel / A2 | ISO 13918 |
| M6 | 20 | CD (type PT) | 0.5 | 1.0 | — | Mild steel / A2 | ISO 13918 |
| M8 | 25 | Drawn-arc (type PD) | 4.0 | 2.0 | 13.0 | Mild steel | ISO 13918 |
| M10 | 30 | Drawn-arc (type PD) | 4.0 | 2.5 | 16.0 | Mild steel | ISO 13918 |
| M12 | 40 | Drawn-arc (type PD) | 5.0 | 3.0 | 19.0 | Mild steel | ISO 13918 |

Product catalog

## Related Weld Studs products

[![Stainless Steel Weld Stud Bolt, B-Type No Step Spot Weld Screw for Sheet Metal](https://img.engineeringhardware.com/Stainless-Steel-Weld-Stud-Bolt-B-Type-No-Step-Spot-Weld-Screw-for-Sheet-Metal.webp)](https://engineeringhardware.com/product/stainless-steel-weld-stud-bolt-b-type-no-step-spot-weld-screw-for-sheet-metal/)

Weld & Shear Studs

### [Stainless Steel Weld Stud Bolt, B-Type No Step Spot Weld Screw for Sheet Metal](https://engineeringhardware.com/product/stainless-steel-weld-stud-bolt-b-type-no-step-spot-weld-screw-for-sheet-metal/)

Weld Stud / Stud Bolt · DIN, GB

**US$0.0504 – 0.084**MOQ 500 pieces

[![304 Stainless Steel Weld Stud It Type Internal Thread Spot Welding Nut Stud M3 M4 M5 M6 M8](https://img.engineeringhardware.com/304-Stainless-Steel-Weld-Stud-It-Type-Internal-Thread-Spot-Welding-Nut-Stud-M3-M4-M5-M6-M8.webp)](https://engineeringhardware.com/product/304-stainless-steel-weld-stud-it-type-internal-thread-spot-welding-nut-stud-m3-m4-m5/)

Weld & Shear Studs

### [304 Stainless Steel Weld Stud It Type Internal Thread Spot Welding Nut Stud M3 M4 M5 M6 M8](https://engineeringhardware.com/product/304-stainless-steel-weld-stud-it-type-internal-thread-spot-welding-nut-stud-m3-m4-m5/)

Stainless Steel · A

**US$0.012 – 2.40**MOQ 100 pieces

[![M16 Shear Stud Weld Connector Weld Stud ISO 13918 Aws D1.1](https://img.engineeringhardware.com/M16-Shear-Stud-Weld-Connector-Weld-Stud-ISO-13918-Aws-D1-1.webp)](https://engineeringhardware.com/product/m16-shear-stud-weld-connector-weld-stud-iso-13918-aws-d1-1/)

Weld & Shear Studs

### [M16 Shear Stud Weld Connector Weld Stud ISO 13918 Aws D1.1](https://engineeringhardware.com/product/m16-shear-stud-weld-connector-weld-stud-iso-13918-aws-d1-1/)

Cheese Head · DIN, ANSI, GB, JIS, BSW, GOST

**US$0.12 – 2.40**MOQ 1,000 pieces

[![Factory Direct Sales Carbon Steel Stainless Steel Plated Welding Stud Welding Nut Post Spot Stud Welding Thread Blind Hole Rivet Sleeve Nuts Spot Stud](https://img.engineeringhardware.com/Factory-Direct-Sales-Carbon-Steel-Stainless-Steel-Plated-Welding-Stud-Welding-Nut-Post-Spot-Stud-Welding-Thread-Blind-Hole-Rivet-Sleeve-Nuts-Spot-Stud.webp)](https://engineeringhardware.com/product/factory-direct-sales-carbon-steel-stainless-steel-plated-welding-stud-welding-nut/)

Weld & Shear Studs

### [Factory Direct Sales Carbon Steel Stainless Steel Plated Welding Stud Welding Nut Post Spot Stud Welding Thread Blind Hole Rivet Sleeve Nuts Spot Stud](https://engineeringhardware.com/product/factory-direct-sales-carbon-steel-stainless-steel-plated-welding-stud-welding-nut/)

Customized · DIN, ANSI, GB, JIS, GOST, BSW

**US$0.012 – 0.12**MOQ 1,000 pieces

[![Movable Weld Stud Fixing Cable Ties with Push Mount 156-00669 Screw Mount Cable Ties](https://img.engineeringhardware.com/Movable-Weld-Stud-Fixing-Cable-Ties-with-Push-Mount-156-00669-Screw-Mount-Cable-Ties.webp)](https://engineeringhardware.com/product/movable-weld-stud-fixing-cable-ties-with-push-mount-156-00669-screw-mount-cable-ties/)

Weld & Shear Studs

### [Movable Weld Stud Fixing Cable Ties with Push Mount 156-00669 Screw Mount Cable Ties](https://engineeringhardware.com/product/movable-weld-stud-fixing-cable-ties-with-push-mount-156-00669-screw-mount-cable-ties/)

Self-Locking · Nylon

**US$0.12 – 12.00**MOQ 500 pieces

[![Solder Point Bolt Metric Thread Capacitor Discharge Self-Clinching Welding Screw Nails Spot Weld Studs](https://img.engineeringhardware.com/Solder-Point-Bolt-Metric-Thread-Capacitor-Discharge-Self-Clinching-Welding-Screw-Nails-Spot-Weld-Studs.webp)](https://engineeringhardware.com/product/solder-point-bolt-metric-thread-capacitor-discharge-self-clinching-welding-screw-2/)

Weld & Shear Studs

### [Solder Point Bolt Metric Thread Capacitor Discharge Self-Clinching Welding Screw Nails Spot Weld Studs](https://engineeringhardware.com/product/solder-point-bolt-metric-thread-capacitor-discharge-self-clinching-welding-screw-2/)

Stainless Steel · A

**US$0.096 – 0.12**MOQ 5,000 pieces

[View all Weld & Shear Studs →](https://engineeringhardware.com/fastener-products/threaded-rods-studs/weld-shear-studs/) [Full product catalog](https://engineeringhardware.com/products/)

## Materials & Grades

Select a material class to see the grades we supply it in. Each designation is listed with its ISO/EN, AISI/SAE, JIS and GB equivalents.

Stainless Steel38 Carbon Steel66 Alloy Steel41 Bearing Steel5 Spring Steel25 Aluminum and Aluminum Alloys21 Brass17 Bronze11 Copper8 Titanium and Titanium Alloys18 Nickel and Nickel Alloys22 Iron-Nickel and High-Temperature Alloys10 Tool Steel and Specialty Hardened Steel9 Structural and Construction Steel9

### Stainless Steel

#### Austenitic Stainless Steel

- A1 AISI 303 · SAE 303 · SUS303 · EN 1.4305 · X8CrNiS18-9
- A2 AISI 304 · SAE 304 · SUS304 · EN 1.4301 · X5CrNi18-10 · 06Cr19Ni10
- 304L AISI 304L · SUS304L · EN 1.4307 · X2CrNi18-9 · 022Cr19Ni10
- 302 AISI 302 · SUS302 · EN 1.4310
- 305 AISI 305 · SUS305 · EN 1.4303
- A4 AISI 316 · SAE 316 · SUS316 · EN 1.4401 · X5CrNiMo17-12-2 · 06Cr17Ni12Mo2
- 316L AISI 316L · SUS316L · EN 1.4404 · X2CrNiMo17-12-2 · 022Cr17Ni12Mo2
- 321 AISI 321 · SUS321 · EN 1.4541 · X6CrNiTi18-10
- 310 / 310S AISI 310 · AISI 310S · SUS310S · EN 1.4845
- 302HQ AISI 302HQ
- A3
- A5
- 347 AISI 347 · SUS347 · EN 1.4550 · X6CrNiNb18-10
- 309 / 309S AISI 309 · AISI 309S · SUS309S

#### Martensitic Stainless Steel

- AISI 410 SUS410 · EN 1.4006 · X12Cr13 · 12Cr13
- AISI 420 SUS420J1 · SUS420J2 · EN 1.4021 · EN 1.4028 · 20Cr13 · 30Cr13
- AISI 431 SUS431 · EN 1.4057 · X17CrNi16-2
- C1
- C3
- C4
- AISI 440A
- AISI 440B
- AISI 440C SUS440C · EN 1.4125

#### Ferritic Stainless Steel

- AISI 430 SUS430 · EN 1.4016 · X6Cr17 · 10Cr17
- F1
- AISI 434
- AISI 444

#### Precipitation-Hardening Stainless Steel

- 17-4 PH AISI 630 · UNS S17400 · SUS630 · EN 1.4542 · X5CrNiCuNb16-4
- 15-5 PH UNS S15500
- 17-7 PH UNS S17700

#### Duplex and Super Duplex Stainless Steel

- Duplex 2205 UNS S31803 · UNS S32205 · EN 1.4462
- Super Duplex 2507 UNS S32750 · EN 1.4410
- D2
- D4
- D6
- D8
- Lean Duplex 2101 UNS S32101
- Super Duplex S32760 UNS S32760 · EN 1.4501

### Carbon Steel

#### Low-Carbon Steel

- SAE 1006
- SAE 1008
- SAE 1010
- SAE 1018
- SAE 1020
- Q195
- Q235
- SAE 1012
- SAE 1015
- Q215
- ML08
- ML08Al
- ML10
- ML15
- ML20
- SWRCH6A
- SWRCH8A
- SWRCH10A
- SWRCH12A
- SWRCH15A
- SWRCH18A

#### Medium-Carbon Steel

- SAE 1035
- SAE 1045
- S45C
- C45
- SAE 1030
- SAE 1040
- SAE 1050
- 30
- 35
- 40
- 45
- 50
- S35C
- S40C
- S50C
- C35
- C40

#### High-Carbon Steel

- SAE 1060
- SAE 1070
- 65Mn
- SAE 1065
- SAE 1075
- SAE 1080
- SAE 1085
- SAE 1090
- SAE 1095
- 60
- 65
- 70
- 75
- 80
- 85

#### Cold-Heading Steel

- SWRCH22A
- 10B21
- SWRCH22K
- SWRCH25K
- SWRCH30K
- SWRCH35K
- SWRCH40K
- ML20Mn
- ML25
- ML30
- ML35
- ML40
- 15B25

### Alloy Steel

#### Chromium Steel

- 40Cr
- 45Cr
- AISI 5140
- SAE 5140
- AISI 5120
- SAE 5120
- SCr420
- SCr440

#### Chromium-Molybdenum Steel

- 35CrMo
- 42CrMo
- AISI 4140
- SCM435
- SCM440
- 42CrMo4
- 30CrMo
- AISI 4130
- SAE 4130
- SAE 4140
- AISI 4142
- AISI 4145
- SCM415
- SCM420
- SCM445
- EN 1.7220
- EN 1.7225
- 25CrMo4
- 34CrMo4

#### Nickel-Chromium-Molybdenum Steel

- AISI 4340
- SAE 4340
- 40CrNiMo
- SNCM439
- EN 1.6511
- 36CrNiMo4

#### Boron Alloy Steel

- 10B22
- 10B21
- 15B21
- 15B25
- 20MnTiB
- 20Mn2B
- 35VB
- 40MnB

### Bearing Steel

#### Bearing Steel

- GCr15
- AISI 52100 SAE 52100 · UNS G52986
- SUJ2
- 100Cr6 EN 1.3505
- GCr15SiMn

### Spring Steel

#### Carbon Spring Steel

- SAE 1065
- SAE 1070
- SAE 1075
- SAE 1080
- SAE 1095
- 65
- 70
- 75
- 80
- 65Mn

#### Silicon-Manganese Spring Steel

- 60Si2Mn
- 60Si2MnA
- SUP6
- SUP7

#### Chromium-Vanadium Spring Steel

- 50CrVA
- SAE 6150
- AISI 6150
- SUP10

#### Stainless Spring Steel

- AISI 301
- SUS301
- EN 1.4310
- AISI 302
- AISI 304
- AISI 316
- 17-7 PH

### Aluminum and Aluminum Alloys

#### Commercially Pure Aluminum

- 1050
- 1060
- 1070
- 1100

#### 2xxx Series Aluminum

- 2024
- 2011
- 2014
- 2017

#### 5xxx Series Aluminum

- 5052
- 5083
- 5754

#### 6xxx Series Aluminum

- 6061
- 6061-T6
- 6063
- 6082
- 6082-T6

#### 7xxx Series Aluminum

- 7075
- 7075-T6
- 7005
- 7050
- 7075-T73

### Brass

#### Free-Cutting Brass

- C36000
- H62
- HPb59-1
- C3601
- C3602
- C3604
- CuZn36Pb3
- CuZn39Pb3
- EN CW614N
- EN CW617N
- H65

#### Lead-Free Brass

- C69300
- C27450
- CW510L
- CW511L

#### Naval Brass

- C46400
- CuZn39Sn1

### Bronze

#### Silicon Bronze

- C65500
- C65100
- C65600

#### Phosphor Bronze

- C51000
- C52100
- CuSn6
- CuSn8

#### Aluminum Bronze

- C95400
- C95500
- C63000
- CuAl10Ni5Fe4

### Copper

#### Copper

- C11000
- T2
- C10100
- C10200
- C12200
- T1
- TU1
- TU2

### Titanium and Titanium Alloys

#### Commercially Pure Titanium

- Grade 2
- Grade 1
- Grade 3
- Grade 4
- TA1
- TA2
- TA3

#### Alpha-Beta Titanium Alloys

- Grade 5
- Ti-6Al-4V
- TC4
- UNS R56400

#### Low-Interstitial Grade

- Grade 23
- Ti-6Al-4V ELI
- UNS R56407

#### Other Titanium Fastener Alloys

- Ti-6Al-6V-2Sn
- Ti-6Al-2Sn-4Zr-2Mo
- Beta-C titanium
- Ti-10V-2Fe-3Al

### Nickel and Nickel Alloys

#### Commercially Pure Nickel

- Nickel 200
- UNS N02200
- Nickel 201
- UNS N02201

#### Inconel Alloys

- Inconel 625 UNS N06625
- Inconel 718 UNS N07718
- Inconel 600 UNS N06600
- Inconel 601 UNS N06601
- Inconel 686 UNS N06686
- Inconel X-750 UNS N07750

#### Monel Alloys

- Monel 400 UNS N04400
- Monel K-500 UNS N05500

#### Hastelloy Alloys

- Hastelloy C-276 UNS N10276
- Hastelloy C-22 UNS N06022
- Hastelloy B-2 UNS N10665
- Hastelloy B-3 UNS N10675
- Hastelloy X UNS N06002

#### Other Nickel Alloys

- Alloy 20 UNS N08020
- Alloy 625
- Alloy 718
- Alloy 825 UNS N08825
- Alloy 925 UNS N09925

### Iron-Nickel and High-Temperature Alloys

#### A286

- A-286
- UNS S66286
- EN 1.4980

#### Invar

- Invar 36
- Alloy 36
- UNS K93600
- FeNi36

#### Alloy 42

- Alloy 42
- UNS K94100
- FeNi42

### Tool Steel and Specialty Hardened Steel

#### Tool Steel and Specialty Hardened Steel

- AISI D2
- AISI H13
- SKD11
- Cr12MoV
- AISI O1
- AISI A2
- AISI S7
- SKD61
- 9CrSi

### Structural and Construction Steel

#### Structural and Construction Steel

- ASTM A36
- Q235B
- Q355B
- S355JR
- Q235C
- Q355C
- S235JR
- S275JR
- S355J2

## Applications & Industries

Where Weld Studs are used, and what decides the specification in each case. Stocked from M3 to M12.

### Industries that specify Weld Studs

- **Sheet-metal fabrication:** Threads added to a panel with no hole and no mark on the show face.
- **Automotive & appliance:** High-volume stud welding on the production line.
- **Insulation & cladding:** Pins and studs welded to duct and vessel walls.
- **Shipbuilding & structural:** Drawn-arc studs on plate and section.
- **Pressure equipment & flanges:** Studs and nuts on flanged joints, where both ends are tightened and the assembly is inspected.
- **Plant & machine installation:** Anchoring and levelling machines onto bases and frames.

### Typical applications

- quote the length BEFORE welding — the stud burns off as it welds
- putting a thread on a panel in about a second, from one side
- assemblies where a hole would break a seal or a coating
- made-to-length assemblies cut and threaded on site
- clamping a joint from both ends where a headed bolt will not fit
- suspending services from a soffit on threaded rod

### Service conditions to specify against

- **Marine and coastal:** Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
- **High load:** Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.

### Where to use something else

- Not for a joint that must be tightened from one side only — there is no head to hold.

[Full application guide: where Weld Studs are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/weld-studs-iso-13918/)

Inside the plant

## Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift.
2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g.
3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1.
4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227.

## Frequently Asked Questions

### Can A4 Stainless Steel Weld Studs (CD and Drawn-Arc) gall during installation?

Yes — stainless on stainless is prone to thread galling under load, especially at smaller sizes. Use an anti-galling lubricant or wax thread compound, and slow the tightening rate where possible.

### Is A4 Stainless Steel food-grade?

A4 (316) is the standard food-contact stainless grade in most jurisdictions, particularly where chloride exposure (brines, dairy CIP) is present.

### Can A4 Stainless Steel Weld Studs (CD and Drawn-Arc) be used with aluminum?

Yes, but stainless drives mild galvanic corrosion of aluminum in wet service — isolate with a coating, sleeve or paint, or accept the trade-off if the joint is dry and indoor.

### What's the service temperature limit for A4 Stainless Steel?

The practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint.

### How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.

## Related Pages

[View the full Weld Studs (CD and Drawn-Arc) page](https://engineeringhardware.com/fastener/weld-studs-iso-13918/)

### More Weld Studs (CD and Drawn-Arc) Guides