Critical temperatures from carbon
API · /heattreat-api
Steel Heat-Treat API
healthy
4,806 Subscribers
Steel heat-treatment maths as an API, computed locally and deterministically — the temperatures and hardness numbers a bladesmith, machinist or metallurgist works to. The critical-temp endpoint gives the critical and process temperatures from carbon content: the lower critical A1 is 727 °C and the upper critical A3 ≈ 910 − 203·√(%C), so a 0.4 %-carbon steel has an A3 around 782 °C and hardens about 817 °C (austenitize 30–50 °C above A3, then quench), while a hypereutectoid steel austenitizes just above A1. The tempering endpoint maps temper oxide colours to temperature both ways — light straw at about 204 °C for hard cutting edges, purple around 282, blue around 304 for springs — with the typical use at each, the colour you watch on bright steel as you draw the hardness back. The hardness endpoint converts between Rockwell C, Brinell and tensile strength (SAE J417 / ASTM E140): HRC 50 is roughly 481 Brinell and about 1,660 MPa tensile, since tensile ≈ 3.45 × Brinell. Everything is computed locally and deterministically, so it is instant and private. Ideal for bladesmithing and metalworking apps, machine-shop and heat-treat tools, materials-engineering calculators, and trade study aids. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Plain-carbon-steel estimates — alloy steels and a tested chart differ.
api.oanor.com/heattreat-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 103 ms
- Server probes · 24h
- Subscribers
- 4,806
- active
- Total calls
- 4
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 460 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 460 calls/month
- 2 req/sec
- Critical temp + tempering + hardness
- No credit card
Starter
€5.45 /month
- 12,200 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- 12,200 calls/month
- 6 req/sec
- A3 from carbon, HRC/HB
- Email support
Pro
€17.60 /month
- 79,000 calls / month
- 15 requests / second
- Hard cap (429 above quota, no overage)
- 79,000 calls/month
- 15 req/sec
- Heat-treat & shop pipelines
- Priority support
Mega
€52.40 /month
- 258,000 calls / month
- 36 requests / second
- Hard cap (429 above quota, no overage)
- 258,000 calls/month
- 36 req/sec
- Platform scale
- Dedicated SLA
Built by
Related APIs
Other APIs with overlapping tags.
Metal Weight API
Metal stock weight and cost as an API, computed locally and deterministically. The weight endpoint computes the mass of a length of metal stock from its shape, dimensions and material: round bar, square bar, flat bar or plate, sheet, hexagonal bar, round tube or pipe and rectangular (box) tube. It works out the cross-sectional area, multiplies by the length and the material density, and returns the weight per piece and the total for a quantity — in kilograms, pounds, grams and tonnes — along with the volume. Material density is looked up from a built-in table of metals (steel, stainless, aluminium, copper, brass, bronze, lead, zinc, titanium, nickel, gold, silver and more) or you can pass an explicit density. The cost endpoint multiplies that weight by a price per kilogram, pound or tonne to give the material cost per piece and in total. The materials endpoint lists the densities. Dimensions accept millimetres, centimetres, metres, inches or feet. Everything is computed locally and deterministically, so it is instant and private. Ideal for metal fabrication and machine-shop tools, engineering and CAD apps, scrap and stock quoting, and shipping-weight estimates. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is metal stock weight from geometry and density; for beam reactions and deflection use a beam API and for live metal spot prices use a commodities API.
api.oanor.com/metalweight-api
Screw Auger API
Screw-conveyor and grain-auger maths as an API, computed locally and deterministically — the capacity, speed and throughput numbers a farmer, millwright or material-handling engineer sizes an auger with. The capacity endpoint gives the volumetric throughput from the screw geometry: the annular flight volume per turn ((π/4)(diameter² − shaft²) × pitch) × rpm × 60 × the trough loading, so a 9-inch full-pitch screw on a 2.5-inch shaft at 40 rpm and 45 % loading moves about 330 cubic feet — 265 bushels — an hour. The speed endpoint inverts it, the rpm needed for a target capacity, so you don't overspeed a small auger and grind the grain. The bushels endpoint converts a volumetric rate to bushels and tons per hour (1 bushel = 1.2445 ft³, tons = bushels × test weight ÷ 2000), so 330 ft³/hr of 56-lb corn is 265 bushels or 7.4 tons an hour — the number you match to the dryer or the truck. Everything is computed locally and deterministically, so it is instant and private. Ideal for grain-handling and ag-equipment apps, material-handling and conveyor-design tools, farm-build calculators, and engineering aids. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Estimates — incline and material change real throughput. For belt conveyors use a conveyor API.
api.oanor.com/auger-api
Radiant Floor API
Radiant-floor and hydronic heating maths as an API, computed locally and deterministically — the output, tubing and flow numbers an installer or DIYer designs a warm floor with. The output endpoint gives the heat a warm floor puts out: about 2 BTU/hr per square foot for every °F the floor surface is above the room, so an 85 °F floor in a 70 °F room delivers roughly 30 BTU/hr/ft² — about 9,000 BTU/hr over 300 ft², the comfort ceiling since the floor is held at ~85 °F. The tubing endpoint gives the tube and loops for an area at a spacing: field tubing = area × 12 ÷ spacing, so 300 ft² at 9-inch spacing needs 400 feet of tube, split into loops kept under ~300 feet (two 200-foot loops) so the pump can push them. The flow endpoint gives the loop flow rate for a heat load, GPM = load ÷ (500 × ΔT) where 500 is water's constant and ΔT is the supply-to-return drop — 9,000 BTU/hr at a 20 °F ΔT wants 0.9 GPM. Everything is computed locally and deterministically, so it is instant and private. Ideal for radiant-heating and plumbing apps, hydronic-design and PEX-layout tools, HVAC contractor calculators, and DIY-build sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Estimates — verify with a full heat-loss calc. For building load use an HVAC API; for pipe velocity use a flow-rate API.
api.oanor.com/radiant-api
Ladder Safety API
Ladder-safety maths as an API, computed locally and deterministically — the angle, reach and load numbers that keep a ladder from sliding out or buckling. The angle endpoint applies the 4:1 rule: the base goes out one foot for every four feet of working length, which lands the ladder at about 75.5° — a 24-foot ladder sits 6 feet from the wall and reaches roughly 23 feet up, steep enough not to tip back and shallow enough not to slide. The extension endpoint gives the usable length and reach of a two-section extension ladder, which loses the overlap the sections share (3 feet up to 36, 4 to 48, 5 beyond), and the working height at the safe angle — remembering the ladder must extend 3 feet above a roof edge you step onto. The duty-rating endpoint turns a total load — your weight plus tools and materials, not just bodyweight — into the right duty class, from Type III household (200 lb) through I industrial (250) to IAA professional (375). Everything is computed locally and deterministically, so it is instant and private. Ideal for construction-safety and trades apps, jobsite and rental tools, OSHA training aids, and home-improvement sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Educational — always follow the manufacturer's labels and OSHA/ANSI rules.
api.oanor.com/ladder-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Steel Heat-Treat API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Steel Heat-Treat API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Steel Heat-Treat API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Steel Heat-Treat API cost?
Steel Heat-Treat API has a free tier with 100 calls / month. Paid plans start at €5.45 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Steel Heat-Treat API GDPR-compliant?
All requests to Steel Heat-Treat API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/heattreat-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/heattreat-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/heattreat-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/heattreat-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
Sign in to rate.
No reviews yet.
Discussion
Ask questions, share usage tips, get answers from the provider and other developers. Public — anyone can read.
Sign in to start a thread or reply.
Sign inNew thread
📌 Pinned
🔒 Locked
·
·
·
-
Provider answer
🔒 This thread is locked — no new replies.
-
·
- No threads yet — start the discussion.
Support
Private 1:1 support with the provider — billing questions, integration issues, account problems. Only you and the provider team can see these threads.
Sign in to open a support ticket.
Sign inOpen new ticket
Describe what you need help with. The provider team gets an email and replies on the ticket page.
-
·
Urgent - No tickets yet for this API.