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DIN EN ISO 4957 1.2344 vs BS 970 (Part 1) 709M40

Related Material — 65% match based on chemical composition and mechanical property overlap.

DIN EN ISO 4957 1.2344 (DIN EN ISO 4957:2018-11) and BS 970 (Part 1) 709M40 (BS 970 (Part 1):1991) are both steel grades. DIN EN ISO 4957 1.2344 is classified under Tool & Die Steels, while BS 970 (Part 1) 709M40 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. DIN EN ISO 4957 1.2344 is typically used for die casting dies, extrusion dies, forging dies, hot shear blades, mandrels, pressure die casting tooling, while BS 970 (Part 1) 709M40 is commonly used for used for aircraft parts, heavy-duty gears, transmission shafts, connecting rods, crankshafts, and engineering fasteners.. DIN EN ISO 4957 1.2344 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 709M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, DIN EN ISO 4957 1.2344 vs BS 970 (Part 1) 709M40 is a 65.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 65%.

Frequently Compared With DIN EN ISO 4957 1.2344:
GB/T 1299 4Cr5MoSiV EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS AISI 52100 IS 1570 (Part 6) 133T3 IS 1570 (Part 6) 55T8 IS 1570 (Part 6) 50T8 IS 1570 (Part 6) 75T6 IS 1570 (Part 6) 70T6 IS 1570 (Part 6) 60T6 IS 1570 (Part 6) 65T6
Match Breakdown
CHEMISTRY MATCH
65.5%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property DIN EN ISO 4957 1.2344 BS 970 (Part 1) 709M40
Standard DIN EN ISO 4957:2018-11 BS 970 (Part 1):1991
Category Tool & Die Steels Alloy Steel
C (%) 0.37–0.43 0.36-0.44
Mn (%) 0.30–0.50 0.70-1.00
Si (%) 0.90–1.20 Not specified
Cr (%) 4.80–5.50 0.90-1.20
Mo (%) 1.20–1.50 0.25-0.35
V (%) 0.90–1.10 Not specified
S (%) ≤0.030 Not specified
P (%) ≤0.030 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property DIN EN ISO 4957 1.2344 BS 970 (Part 1) 709M40
Hardness (annealed) ≤229 HB Not specified
Hardness (hardened) 44–52 HRC Not specified
Tensile Strength 1200–1600 MPa Not specified
Elongation ≥8% Not specified
Typical Applications
DIN EN ISO 4957 1.2344
Die casting dies, extrusion dies, forging dies, hot shear blades, mandrels, pressure die casting tooling
BS 970 (Part 1) 709M40
Used for aircraft parts, heavy-duty gears, transmission shafts, connecting rods, crankshafts, and engineering fasteners.
Key Differences
Can DIN EN ISO 4957 1.2344 Be Substituted With BS 970 (Part 1) 709M40?
DIN EN ISO 4957 1.2344 and BS 970 (Part 1) 709M40 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
DIN EN ISO 4957 1.2344
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–3700 mm (118.11–145.67 in)
BS 970 (Part 1) 709M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–6800 mm (259.84–267.72 in)
On M-EX Right Now
DIN EN ISO 4957 1.2344
2 active listings and RFQs →
BS 970 (Part 1) 709M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between DIN EN ISO 4957 1.2344 and BS 970 (Part 1) 709M40?
Different category: DIN EN ISO 4957 1.2344 is Tool & Die Steels, BS 970 (Part 1) 709M40 is Alloy Steel. DIN EN ISO 4957 1.2344 specifies Si, V, S, P which are not specified for BS 970 (Part 1) 709M40.
Can DIN EN ISO 4957 1.2344 be substituted with BS 970 (Part 1) 709M40?
DIN EN ISO 4957 1.2344 and BS 970 (Part 1) 709M40 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.