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1.2316 Steel Selection: 4-Step Grade Guide

Picking wrong mold steel wastes money and causes early mold breakdown. 1.2316 Steel Selection (3Cr17NiMo) performs well but is not universal. This 4-step method covers corrosion risk, working temperature, output volume and budget, letting you confirm whether 1.2316 fits your project and pick the proper variant within 5 minutes.

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1.2316 Steel Selection
1.2316 Steel Selection
1.2316 Steel Machining
1.2316 Steel Machining
1.2316 milling service
1.2316 milling service
1.2316 material milled surface
1.2316 material milled surface
DIN 1.2316
DIN 1.2316
1.2316 steel turned bar
1.2316 steel turned bar
1.2316 Special Steel
1.2316 Special Steel
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1.2316 steel milled surface

Step 1: Judge Corrosion Risk – Top Standard for 1.2316 Steel Selection

 
Corrosion risk is the first factor to consider 1.2316. You can choose 1.2316 if any of the four situations below exists:
 
  1. Molding chlorine-containing plastic such as PVC and CPVC. HCl gas releases under injection temperature, mixes with moisture to form acid environment, and ordinary mold steel will rust in 3 to 6 months.
  2. The workshop stays humid above 70% all year, like coastal factories or areas with long rainy seasons. Its stainless property avoids production stops caused by rust.
  3. Products for medical or food use need frequent cleaning and disinfection. Anti-corrosion steel prevents damage from cleaning liquids.
  4. Chlorine exists in release agents or cooling water. High chloride content in industrial water leads to long-term mold corrosion.
 
If none of these conditions appear, P20 (1.2311) or 718H (1.2738) are more cost-effective. Core rule for 1.2316 selection: Only use 1.2316 when corrosion exists; do not spend extra money without corrosion risks.
 

Step 2: Confirm Working Temperature – 1.2316 Steel Selection or Other Material

 

The safe long-term working temperature of 1.2316 steel is under 300°C. Its hardness, toughness and anti-corrosion performance stay stable below this value. Hardness drops above 300°C, and anti-rust ability weakens over 500°C due to chromium carbide separation.

 

Selection rule:

 
  • Mold working temperature ＜300°C: Continue evaluating 1.2316
  • Mold working temperature ＞300°C: Switch to H13 (1.2344) or other hot work mold steel
 
Common application judgment:
 
  • Injection mold: Mold temperature 20–150°C, fully within safe range
  • Low-pressure injection: Material temperature 200–300°C, mold temperature below 150°C, 1.2316 is usable
  • Hot pressing molding: Mold temperature 150–250°C, acceptable for 1.2316
  • Aluminum & zinc die casting: Mold temperature 500–700°C, far beyond 1.2316 limit, cannot be used
 

Step 3: Evaluate 1.2316 Steel Selection – Standard or ESR Grade?

 
This step decides between standard LF+VD 1.2316 and upgraded ESR version based on production quantity and surface finish needs:
 
  • Shots below 200,000: Standard pre-hardened steel (28–34 HRC) is enough, no ESR needed
  • 200,000–500,000 shots: Standard pre-hardened steel works, increase mold maintenance and surface inspection frequency
  • 500,000–1,000,000 shots: Choose ESR grade, harden to 40–44 HRC via quenching & tempering
  • Over 1,000,000 shots: ESR steel quenched to 44–48 HRC plus PVD coating (CrN, TiAlN) to extend service life
 

For transparent parts (PC, PMMA lens) or mirror surface products, pick ESR steel even with low output. ESR cuts impurities by 60–80% and brings better polishing effect that standard steel cannot match.

 

The core logic: Output and surface quality decide whether to pay extra for ESR steel.

Production ShotsRecommended GradeHardnessDelivery StateESR Required
＜200,000Standard LF+VD28-34 HRCPre-hardenedNo
200,000-500,000Standard LF+VD28-34 HRCPre-hardenedNo (More maintenance)
500,000-1,000,000ESR Grade40-44 HRCAnnealed (Self heat treatment)Yes
＞1,000,000ESR + Coating44-48 HRC + PVDAnnealed (Self heat treatment)Yes

 

Step 4: Budget & Lead Time Restrictions of 1.2316 Steel Selection

 
The last step considers actual cost and delivery cycle. Three grades of 1.2316 have different prices and lead times:
 
  1. Standard pre-hardened 1.2316: Base price, regular sizes in stock and deliverable in 1–3 days, the fastest and cheapest option
  2. ESR 1.2316: 30–50% more expensive than standard grade, lead time 1–3 weeks, 4–6 weeks for customized large blanks
  3. Annealed 1.2316: 10–15% cheaper than pre-hardened steel without pre-hardening heat treatment, delivery time depends on outsourced heat treatment schedule
 
Budget advice:
 
  • Small standard molds: Standard pre-hardened steel is suitable; processing cost takes most of the total budget
  • Medium precision molds: ESR grade is worthy. Material premium accounts for less than 5% of total mold cost, greatly lifting stability and service life
  • Large molds (high total cost): ESR or customized forged steel. Higher material cost brings long-term economic benefits for massive production

FAQ:

Q1: How to choose between P20 and 1.2316?

A: Pick 1.2316 with corrosion risks; choose P20 without corrosion. Do not buy expensive 1.2316 for PP/PE molds with no corrosion, P20 28-32 HRC pre-hardened steel fully meets demands.

A:

  • PVC mold → Standard pre-hardened 1.2316
  • Medical & food mold → ESR 1.2316
  • Transparent PC lens mold → ESR 1.2316
  • Common PP/PE mold → P20
  • Die casting mold → H13
  • Urgent delivery → Standard pre-hardened 1.2316 stock

A: Adjustment is possible, but better to make correct decisions before purchase. If you bought 1.2316 without corrosion needs, it can still work normally but costs more than P20. If you bought P20 with anti-rust demands, surface coating (chrome plating, nitriding) can only provide weak protection, worse than original 1.2316 steel. Spend 5 minutes on selection before buying to avoid later troubles.

Conclusion

Proper material selection guarantees half of mold success. If you have doubts on corrosion risk, production volume and ESR grade choice of 1.2316 steel selection, Keyspark Steel engineers offer quick project evaluation. With 20 years of special steel supply experience, we help you make reliable selection instead of only selling steel.

📧 Email: Sales@keysparksteel.com
📱 Mobile/WhatsApp: +86 150 2405 6480

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