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S7 1.2355
Qilu
Product Description
Hot forged S7 round bar and blocks, supplied annealed or QT to 50-56 HRC, with heat treatment and ultrasonic testing done in our own workshop.
Equivalent to: AISI S7 · DIN 1.2355 / 50CrMoV13-15
AISI S7 1.2355 50CrMoV13-15 Impact Resstance Tool Steel Forg
AISI S7 1.2355 50CrMoV13-15 Impact Resstance Tool Steel Forg
AISI S7 1.2355 50CrMoV13-15 Impact Resstance Tool Steel Forg
Supply form — Round bar, flats and blocks
Process — Hot forged / hot rolled
Condition — Annealed (≤ 229 HB), or QT to 50-56 HRC
Diameter range — 10-400 mm
Standard — ASTM A681
Certificate — EN 10204 3.1 standard, 3.2 on request
Lead time — 15-30 days
S7 is the shock-resisting tool steel of ASTM A681. With 3 % chromium and 1.3 % molybdenum at moderate carbon (0.45-0.55 %), it is designed to take repeated impact without chipping — the standard grade for chisels, punches, shear blades, and rivet and bolt tools that must survive shock loading.
| Element | C | Mn | Si | Cr | Mo | V |
|---|---|---|---|---|---|---|
| ASTM A681 S7 | 0.45-0.55 | 0.20-0.80 | 0.20-1.00 | 3.00-3.50 | 1.30-1.80 | 0.20-0.30 |
Typical values. S7 is run at high hardness but its key property is impact toughness.
| Property | Annealed | QT (typical) |
|---|---|---|
| Hardness | ≤ 229 HB | 50-56 HRC |
| Tensile strength, Rm (MPa) | — | 1600-1800 |
| Impact, KV (J) | — | ≥ 30 |
| Toughness | — | Excellent (shock-resisting) |
| Standard | Designation |
|---|---|
| ASTM (USA) | S7 |
| DIN / EN (Germany/Europe) | 1.2355 / 50CrMoV13-15 |
| Werkstoff Nr. | 1.2355 |
| Related | ~50CrMoV13-15 |
Punching — punches, piercers, chisels
Shearing — hot and cold shear blades
Impact tools — rivet sets, bolt cutters, scaling hammers
Tooling — bolt and rivet tooling, swaging dies
S7 is hardened from 925-980 °C in oil or air and tempered at 200-250 °C (for max hardness) or 400-450 °C (for toughness). The grade is optimised for impact toughness, so the tempering temperature is chosen by the working shock load — we tune it to your spec and verify with Charpy testing.
Most suppliers in this business are traders who subcontract everything. We run our own processes, which means shorter cycles and one point of accountability when something needs fixing.
Heat treatment shop — quenching, tempering and vacuum heat treatment to your target hardness, with furnace charts recorded per batch
Machining shop — rough turning, peeling, milling and cutting to length, so your bar or block arrives ready for finish machining
Testing — ultrasonic per ASTM A388 / EN 10228-3, hardness mapping across the section, microstructure on request
Certification — EN 10204 3.1 as standard, 3.2 available with third-party witness (ABS, BV, CCS, GL)
Export packing — bundled, end-capped and rust-protected for sea freight
Tools that must survive repeated impact: punches, chisels, shear blades, rivet and bolt tooling, swaging dies. S7 is designed for shock resistance first; for wear resistance choose D2 or A2. See our D2 page.
Yes. We quench and temper to your target hardness, with hardness verified and Charpy impact tested on request.
EN 10204 3.1 mill certificate as standard. 3.2 with third-party witness on request.
Send us your grade, dimensions, quantity, required hardness and destination port. You will get a quotation with the full technical proposal within 24 hours.
Email: enquiry@qilumetal.com | Web: www.qilumetal.com
