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BS 970 EN1A Leaded vs SAE J403 12L14

Strong Match — 85.7% match based on chemical composition and mechanical property overlap.

BS 970 EN1A Leaded (BS 970:1955) and SAE J403 12L14 (SAE J403:2014) are both steel grades. Both fall under the Free Machining Steel category. BS 970 EN1A Leaded is typically used for high speed automatic machining, precision parts, while SAE J403 12L14 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 EN1A Leaded is defined under British Standards (BS), originating from United Kingdom, while SAE J403 12L14 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN1A Leaded vs SAE J403 12L14 is a 85.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 85.7%.

Frequently Compared With BS 970 EN1A Leaded:
SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1126 SAE J403 1117 SAE J403 1126 SAE J403 1118 IS 1570 (Part 3) 10C8S10 IS 4432 10C8S10 SAE J403 1126 SAE J403 1118 SAE J403 1132
Match Breakdown
CHEMISTRY MATCH
85.7%
MECHANICAL MATCH
No shared data
OVERALL
85.7%
Specifications
Property BS 970 EN1A Leaded SAE J403 12L14
Standard BS 970:1955 SAE J403:2014
Category Free Machining Steel Free Machining Steel
C (%) 0.07–0.15 <=0.15
Mn (%) 0.80–1.20 0.85-1.15
S (%) 0.20–0.30 0.26-0.35
Pb (%) 0.15–0.35 0.15-0.35
P (%) Not specified 0.04-0.09
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 EN1A Leaded SAE J403 12L14
Tensile Strength 380–490 MPa Not specified
Elongation ≥20% Not specified
Hardness ≤152 HB Not specified
Typical Applications
BS 970 EN1A Leaded
High speed automatic machining, precision parts
SAE J403 12L14
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 EN1A Leaded Be Substituted With SAE J403 12L14?
BS 970 EN1A Leaded and SAE J403 12L14 overlap closely enough on chemistry and mechanical properties that SAE J403 12L14 is often considered as a substitute for BS 970 EN1A Leaded in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
BS 970 EN1A Leaded
Round Bar → (3 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 2700–3800 mm (106.3–149.61 in)
SAE J403 12L14
Hex Bar → (3 listings)
Across Flats: 25–25 mm (0.98–0.98 in)
Length: 3400–3700 mm (133.86–145.67 in)
On M-EX Right Now
BS 970 EN1A Leaded
3 active listings and RFQs →
SAE J403 12L14
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN1A Leaded and SAE J403 12L14?
SAE J403 12L14 specifies P which is not specified for BS 970 EN1A Leaded.
Can BS 970 EN1A Leaded be substituted with SAE J403 12L14?
BS 970 EN1A Leaded and SAE J403 12L14 overlap closely enough on chemistry and mechanical properties that SAE J403 12L14 is often considered as a substitute for BS 970 EN1A Leaded in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.